Tag: sustainability

What is bioenergy with carbon capture and storage (BECCS)?

18 May 2021

Carbon capture

What is bioenergy with carbon capture and storage (BECCS)? 

Bioenergy with carbon capture and storage (BECCS) is the process of capturing and permanently storing carbon dioxide (CO2) from biomass (organic matter) energy generation.

Why is BECCS important for decarbonisation? 

When sustainable bioenergy is paired with carbon capture and storage it becomes a source of negative emissions, as CO2 is permanently removed from the carbon cycle.

Experts believe that negative emissions technologies (NETs) are crucial to helping countries meet the long-term goals set out in the Paris Climate Agreement. As BECCS is the most scalable of these technologies this decade, it has a key role to play in combating climate change.

How is the bioenergy for BECCS generated?

Most bioenergy is produced by combusting biomass as a fuel in boilers or furnaces to produce high-pressure steam that drives electricity-generating turbines. Alternatively, bioenergy generation can use a wide range of organic materials, including crops specifically planted and grown for the purpose, as well as residues from agriculture, forestry and wood products industries. Energy-dense forms of biomass, such as compressed wood pellets, enable bioenergy to be generated on a much larger scale. Fuels like wood pellets can also be used as a substitute for coal in existing power stations.

How is the carbon captured?

BECCS uses a post-combustion carbon capture process, where solvents isolate CO2 from the flue gases produced when the biomass is combusted. The captured CO2 is pressurised and turned into a liquid-like substance so it can then be transported by pipeline.

How is the carbon stored?

Captured CO2 can be safely and permanently injected into naturally occurring porous rock formations, for example unused natural gas reservoirs, coal beds that can’t be mined, or saline aquifers (water permeable rocks saturated with salt water). This process is known as sequestration.

Over time, the sequestered CO2 may react with the minerals, locking it chemically into the surrounding rock through a process called mineral storage.

BECCS fast facts

Is BECCS sustainable?

 Bioenergy can be generated from a range of biomass sources ranging from agricultural by-products to forestry residues to organic municipal waste. During their lifetime plants absorb CO2 from the atmosphere, this balances out the CO2that is released when the biomass is combusted.

What’s crucial is that the biomass is sustainably sourced, be it from agriculture or forest waste. Responsibly managed sources of biomass are those which naturally regenerate or are replanted and regrown, where there’s a increase of carbon stored in the land and where the natural environment is protected from harm.

Biomass wood pellets used as bioenergy in the UK, for example, are only sustainable when the forests they are sourced from continue to grow. Sourcing decisions must be based on science and not adversely affect the long-term potential of forests to store and sequester carbon.

Biomass pellets can also create a sustainable market for forestry products, which serves to encourage reforestation and afforestation – leading to even more CO2 being absorbed from the atmosphere.

Go deeper:

  • The triple benefits for the environment and economy of deploying BECCS in the UK.
  • How BECCS can offer essential grid stability as the electricity system moves to low- and zero-carbon sources.
  • Producing biomass from sustainable forests is key to ensuring BECCS can deliver negative emissions.
  • 5 innovative projects where carbon capture is already underway around the world
  • 7 places on the path to negative emissions through BECCS

Evaluating regrowth post-harvest with accurate data and satellite imagery

13 May 2021

Sustainable bioenergy

  • Drax has been using effective post-harvest evaluations, which includes remote sensing technology and satellite imagery

  • Alongside sustainable forest management, monitoring can help support rapid regrowth after harvesting

  • Evidence shows healthy managed forests with no signs of deforestation or degradation

As part of Drax’s world-leading programme of demonstrating biomass sustainability, including ongoing work on catchment area analysis (CAA), responsible sourcing policy and healthy forest landscapes (HFL). We have also been trialling the use of high-resolution satellite imagery to monitor forest conditions on specific harvesting sites in the years after harvesting has taken place, in addition to the catchment area level monitoring of trends and data. Post-harvest evaluations (PHE) are an essential part of an ongoing sustainability monitoring process, ensuring that the future forest resource is protected and maintained and that landowners restore forests after harvesting to prevent deforestation or degradation.

The most effective form of PHE is for an experienced local forester to walk and survey the harvesting site to check that new trees are growing and that the health and quality of the young replacement forest is maintained.

Rapid regrowth

The images below show some of the sites surrounding Drax’s Amite Bioenergy pellet plant in Mississippi, with trees at various stages of regrowth in the years after harvesting.

A full site inspection can therefore enable a forester to determine whether the quantity and distribution of healthy trees is sufficient to make a productive forest, equivalent to the area that was harvested. It can also identify if there are any health problems, pest damage or management issues such as  weed growth or water-logging that should be resolved.

Typically, this will be the responsibility of the forest owner or their forest manager and is a regular part of ongoing forest management activity. This degree of survey and assessment is not practical or cost-effective where a third-party consumer of wood fibre purchases a small proportion (typically 20-25 tonnes per acre) of the low-grade fibre produced at a harvest as a one-off transaction for its wood pellet plant..  It is time consuming to walk every acre of restocked forest and it is not always possible to get an owner’s permission to access their land.

Forests from space

Therefore, an alternative methodology is required to make an assessment about the condition of forest lands that have been harvested to supply biomass, without the need to physically inspect each site.  One option is to use remote sensing and satellite imagery to view each harvested site in the years after biomass sourcing, this helps to monitor restocking and new tree growth.

Drax has been testing the remote sensing approach using Maxar’s commercial satellite imagery.  Maxar has four satellites on orbit that collect more than three million square kilometres of high-resolution imagery every day. Drax accesses this imagery through Maxar’s subscription service SecureWatch.

To test the viability of this methodology, Drax has been looking at harvesting sites in Mississippi that supplied biomass to the Amite Bioenergy pellet plant in 2015 and in 2017.  As part of the sustainability checks that are carried out prior to purchasing wood fibre, Drax collects information on each harvesting tract. This includes the location of the site, the type of harvest, the owner’s long-term management intentions and species and volume details.

This data can then be used at a later date to revisit the site and monitor the condition of the area. Third-party auditors, for instance Through Sustainable Biomass Program (SBP) certification, do visit harvesting sites, however this is typically during the year of harvest rather than after restocking. Maxar has historical imagery of this region from 2010, which is prior to any harvesting for wood pellets.  The image below shows a harvesting site near the pellet plant at Gloster, Mississippi, before any harvesting has taken place.

March 2010 (100m)

Satellite image © 2021 Maxar Technologies.

The image below shows the same site in 2017 immediately following harvesting.

December 2017 (100m)

Satellite image © 2021 Maxar Technologies.

If we look again at this same site three years after harvesting, we can see the rows of trees that have been planted and the quality of the regrowth. This series of images demonstrates that this harvested area has remained a forest, has not been subject to deforestation and that the regrowth appears to be healthy at this stage.

August 2020 (50m)

Satellite image © 2021 Maxar Technologies.

Another site in the Amite catchment area is shown below. The image shows a mature forest prior to harvesting, the site has been previously thinned as can be seen from the thinned rows that are evident in the imagery.

May 2010 (200m)

Satellite image © 2021 Maxar Technologies.

Looking at the same site in the year after harvesting, the clear cut area can be seen clearly. Some green vegetation cover can also be seen on the harvested area, but this is weed growth rather than replanted trees. Some areas of mature trees have been left at the time of harvesting, and are visible as a grey colour in the 2010 image. These are likely to be streamside management zones that have been left to maintain biodiversity and to protect water quality, with the grey winter colouring suggesting that they are hardwoods.

September 2018 (200m)

Satellite image © 2021 Maxar Technologies.

Three years after the harvest, in a zoomed in view from the previous image, clear rows of replanted trees can be seen in the imagery.  This demonstrates that the owner has successfully restocked the forest area and that the newly planted forest appears healthy and well established.

August 2020 (50m)

Satellite image © 2021 Maxar Technologies.

While examining different harvesting sites in satellite imagery, Drax noted that not every site had evidence of tree growth, particularly within the first three years after harvesting. Deliberate conversion of land to non-forest use, such as for conversion to pasture, agricultural crops or urban development, is likely to be evident fairly soon after harvesting.

Preparing for planting

Some forest owners like to leave a harvested site unplanted for a couple of years to allow ground vegetation and weed growth to establish, this can then be treated to ensure that trees can be planted and that the weed growth does not impede the establishment of the new forest, this process can mean that trees are not visible in satellite imagery for three to four years after harvesting.

The image below shows a site three years after harvesting with no evidence of tree growth.  Given that no conversion of land use is evident and that the site appears to be clear of weed growth, this is likely to be an example of where the owners have waited to clear the site of weeds prior to replanting.  This site can be monitored in future imagery from the Maxar satellites to ensure that forest regrowth does take place.

November 2020 (100m)

Satellite image © 2021 Maxar Technologies.

Drax will continue to use Maxar’s SecureWatch platform to monitor the regrowth of harvesting sites and will publish more detailed results and analysis when this process has been developed further.  The platform allows ongoing comparison of a site over time and could prove a more efficient method of analysis than ground survey.  In conjunction with the CAA and HFL work, PHE can add remote sensing as a valuable monitoring and evidence-gathering tool to demonstrate robust biomass sustainability standards and a positive environmental impact.

Go deeper: 

Discover the steps we take to ensure our wood pellet supply chain is better for our forests, our planet and our future here, how to plant more trees and better manage them, our responsible sourcing policy for biomass from sustainable forests and a guide to sustainable forest management of the Southern Working Forest.

Global collaboration
is key to tackling
the climate crisis

Will Gardiner, Chief Executive Officer, Drax Group

22 April 2021

Opinion

Leaders from 40 countries are meeting today, albeit virtually, as part of President Joe Biden’s Leaders’ Summit on Climate. The event provides an opportunity for world leaders to reaffirm global efforts in the fight against climate change, set a clear pathway to net zero emissions, while creating jobs and ensuring a just transition.

Since taking office President Biden has made bold climate commitments and brought the United States back into the Paris Agreement. Ahead of the two-day summit, he announced an ambitious 2030 emissions target and new Nationally Determined Contributions. The US joins other countries that have announced significant reduction goals. For example, the EU committed to reduce its emissions by at least 55%, also South Korea, Japan and China have all set net-zero targets by mid-century.

Here in the UK, Prime Minister Boris Johnson this week outlined new climate commitments that will be enshrined in law. The ambitious new targets will see carbon emissions cut by 78% by 2035, almost 15 years earlier than previously planned. If delivered, this commitment which is in-line with the recommendations of the Climate Change Committee’s sixth carbon budget will put the UK at the forefront of climate action, and for the first time the targets include international aviation and shipping.

What makes climate change so difficult to tackle is that it requires collaboration from many different parties on a global scale never seen before. As a UK-North American sustainable energy company, with communities on both sides of the Atlantic, at Drax we are keenly aware of the need for thinking that transcends borders, creating a global opportunity for businesses and governments to work together towards a shared climate goal. That’s why we joined other businesses and investors in an open letter supporting the US government’s ambitious climate actions.

Collaboration between countries and industries

It’s widely recognised that negative emissions technologies will be key to global efforts to combat climate change.

At Drax we’re pioneering the negative emissions technology bioenergy with carbon capture and storage (BECCS) at our power station in North Yorkshire, which when up and running in 2027 will capture millions of tonnes of carbon dioxide (CO2) per year, sending it for secure storage, permanently locking it away deep under the North Sea.

Experts on both sides of the Atlantic consider BECCS essential for reaching net zero. The UK’s Climate Change Committee says it will play a major role in removing CO2 emissions that will remain in the UK economy after 2050 from industries such as aviation and agriculture that will be difficult to fully decarbonise. Meanwhile, a report published last year by New York’s Columbia University revealed that rapid development of BECCS is needed within the next 10 years in order to curb climate change and a recent report from Baringa, commissioned by Drax, showed it will be a lot more expensive for the UK to reach its legally binding fifth carbon budget between 2028 and 2031 without BECCS.

A shared economic opportunity

Globally as many as 65 million well-paid jobs could be created through investment in clean energy systems. In the UK, BECCS and negative emissions are not just essential in preventing the impact of climate change but will also be a key component of a post-Covid economy.

Government and private investments in clean energy technologies can create thousands of well-paid jobs, new careers, education opportunities and upskill workforces. Developing BECCS at Drax Power Station, for example, would support around 17,000 jobs during the peak of construction in 2028, including roles in construction, local supply chains and the wider economy. It would also act as an anchor project for the Zero Carbon Humber initiative, which aims to create the world’s first net zero industrial cluster. Developing a carbon capture, usage, and storage (CCUS) and hydrogen industrial cluster could spearhead the creation and support of tens of thousands of jobs across the Humber region and more than 200,000 around the UK in 2039.

Under the Humber Bridge

Additional jobs would be supported and created throughout our international supply chain. This includes the rail, shipping and forestry industries that are integral to rural communities in the US South and Western Canada.

A global company

As a British-North American company, Drax embodies the positive impact that clean energy investments have. We directly employ 3,400 people in the US, Canada, and the UK, and indirectly support thousands of families through our supply chains on both sides of the Atlantic. Drax is strongly committed to supporting the communities where we operate by investing in local initiatives to support the environment, jobs, education, and skills.

From the working forests of the US South and Western Canada to the Yorkshire and Humber region, and Scotland, we have a world-leading ambition to be carbon negative by 2030. At Drax, we believe the challenge of climate change is an opportunity to improve the environment we live in. We have reduced our greenhouse gas emissions by over 80% and transformed into Europe’s largest decarbonisation project. Drax Power Station is the most advanced BECCS project in the world and we stand ready to invest in this cutting-edge carbon capture and removal technology. We can then share our expertise with the rest of the world – a world where major economies are committing to a net zero future and benefiting from a green economic recovery.

If we are to reach the targets set in Paris, global leaders must lock in this opportunity and make this the decade of delivery.

The world’s leading sustainable biomass generation and supply business

Will Gardiner, Chief Executive Officer, Drax Group

13 April 2021

Opinion

Today we completed a transformational deal – our acquisition of Canadian biomass pellet producer Pinnacle Renewable Energy.

I’m very excited about this important acquisition and welcoming our new colleagues to the Drax family – together we will build on what we have already achieved, having become the biggest decarbonisation project in Europe and the UK’s largest single site renewable power generator as a result of us using sustainable biomass instead of coal.

The deal positions Drax as the world’s leading sustainable biomass generation and supply business – making us a truly international business, trading biomass from North America to Europe and Asia. It also advances our strategy to increase our self supply, reduces our biomass production costs and creates a long-term future for sustainable biomass – a renewable energy source that the UN’s IPCC says will be needed to achieve global climate targets.

It’s also an important milestone in Drax’s ambition to become a carbon negative company by 2030 and play an important role in tackling the global climate crisis with our pioneering negative emissions technology BECCS.

That’s because increasing our annual production capacity of sustainable biomass while also reducing costs helps pave the way for our plans to use bioenergy with carbon capture and storage (BECCS) at Drax.

Negative emissions from BECCS are vital to address the global climate emergency while also providing the renewable electricity needed for a net zero economy, supporting jobs and clean growth in a post-Covid recovery.

Inside a Pinnacle pellet mill

Inside a Pinnacle pellet mill

We already know Pinnacle well – it is one of our key suppliers and the company is a natural fit with Drax.

Our new colleagues have a wealth of operational and commercial expertise so I’m looking forward to seeing what we can achieve together.

We will benefit from Pinnacle’s scale, operational efficiency and low-cost fibre sourcing, that includes a high proportion of sawmill residues. In 2019, Pinnacle’s production cost was 20% lower than Drax’s.

Completing this deal will increase our annual production capacity to 4.9 million tonnes of sustainable biomass pellets at 17 plants in locations across Western Canada and the US South – up from 1.6Mt now.

It also expands our access to three major North American fibre baskets and four export facilities, giving us a large and geographically diversified asset base, which enhances our sourcing flexibility and security of supply.

This positions us well to take advantage of the global growth opportunities for sustainable biomass. The market for biomass wood pellets for renewable generation in Europe and Asia is expected to grow in the current decade, principally driven by demand in Asia.

Biomass wood pellet storage dome, Drax Power Station

Biomass wood pellet storage dome, Drax Power Station

We believe that with increasingly ambitious global decarbonisation targets, the need for negative emissions and improved understanding of the role that sustainably sourced biomass can play, will result in continued robust demand.

Pinnacle is already a key supplier of wood pellets to other markets with C$6.7 billion of long-term contracts with high quality Asian and European customers, including Drax, and a significant volume contracted beyond 2027.

Drax aims to leverage Pinnacle’s trading capability across its expanded portfolio. We believe that the enlarged supply chain will provide greater opportunities to optimise the supply of biomass from its own assets and third-party suppliers.

The transport and shipping requirements of the enlarged company will provide further opportunities to optimise delivery logistics, helping to reduce distance, time, carbon footprint and cost.

Train transporting biomass wood pellets arriving at Drax Power Station

Importantly – there will also be opportunities to share best practice and drive sustainability standards higher across the group.

We recognise that the forest landscape in British Columbia and Alberta is different to the commercially managed forests in the south eastern US where we currently operate.

In line with our world leading responsible sourcing policy, Drax will work closely with environmental groups, Indigenous First Nation communities and other stakeholders and invest to deliver good environmental, social and climate outcomes in Pinnacle’s sourcing areas.

We are determined to create a long-term future for sustainable biomass and deliver BECCS –  the negative emissions technology that will be needed around the world to meet global climate targets. The acquisition of Pinnacle takes us a big step forward in achieving our goals.

Read press release: Drax completes acquisition of Pinnacle Renewable Energy Inc.

 

What is renewable energy?

17 December 2020

Sustainable bioenergy

These differ to non-renewable energy sources such as coal, oil and natural gas, of which there is a finite amount available on Earth, meaning if used excessively they could eventually run out.

Renewable resources can provide energy for a variety of applications, including electricity generation, transportation and heating or cooling.

The difference between low-carbon, carbon neutral and renewable energy

Renewables such as wind, solar and hydropower are zero carbon sources of energy because they do not produce any carbon dioxide (CO2) when they generate power. Low-carbon sources might produce someCO2, but much less than fuels like coal.

Bioenergy that uses woody biomass from sustainably managed forests to generate electricity is carbon neutral because forests absorb CO2 from the atmosphere as they grow, meaning the amount of CO2 in the atmosphere remains level. Supply chains that bring bioenergy to power stations commonly use some fossil fuels in manufacturing and transportation. Therefore woody biomass is a low carbon fuel, when its whole lifecycle is considered.

Managing forests in a sustainable way that does not lead to deforestation allows bioenergy to serve as a renewable source of power. Responsible biomass sourcing also helps forests to absorb more carbon while displacing fossil fuel-based energy generation.

Nuclear is an example of a zero carbon source of electricity that is not renewable. It does not produce CO2,but it is dependent on uranium or plutonium, of which there is a finite amount available.

Managing forests in a sustainable way that does not lead to deforestation allows bioenergy to serve as a renewable source of power.

How much renewable energy is used around the world?

Humans have harnessed renewable energy for millions of years in the form of woody biomass to fuel fires, as well as wind to power ships and geothermal hot springs for bathing. Water wheels and windmills are other examples of humans utilising renewable resources, but since the industrial revolution fossil fuels, coal in particular, have been the main source of power.

However, as the effects of air pollution and CO2 produced from burning fossil fuels become increasingly apparent, renewable energy is gradually replacing sources which contribute to climate change.

In the year 2000 renewable energy accounted for 18% of global electricity generation, according to the IEA. By 2019, renewable sources made up 27% of the world’s electrical power.

Why renewable energy is essential to tackling climate change

The single biggest human contribution to climate change is greenhouse gas emissions, such as CO2, into the atmosphere. They create an insulating layer around the planet that causes temperatures on Earth to increase, making it less habitable.

Renewable sources of electricity can help to meet the world’s demand for power without contributing to global warming, unlike carbon-intensive fuels like coal, gas and oil.

Bioenergy can also be used to remove CO2 from the atmosphere while delivering renewable electricity through a process called bioenergy with carbon capture and storage (BECCS).

Forests absorb CO2 from the atmosphere, then when the biomass is used to generate electricity the same CO2 is captured and stored permanently underground – reducing the overall amount of CO2 in the atmosphere.

Humans have used renewable energy for millions for years, from wood for fires to wind powering boats to geothermal hot springs. 

What’s holding renewables back?

The world’s energy systems were built with fossil fuels in mind. This can make converting national grids difficult and installing new renewable energy sources expensive. However, as knowledge grows about how best to manufacture, build and operate renewable systems, the cost of deploying them at scale drops.

There are future changes needed. Renewables such as wind, solar and tidal power are known as intermittent renewables because they can’t generate electricity when there is no sun, wind or the tidal movement. For future energy systems to deliver enough power, large scale energy storage, as well as other flexible, reliable forms of generation will also be needed to meet demand and keep systems stable.

Renewable energy key facts:  

Go deeper

Burns Lake and Houston pellet plant catchment area analysis

25 November 2020

Sustainable bioenergy
British Columbia, near Barriere, North Thompson River, aspen trees, dead pine trees behind infected with pine bark beetle (aka mountain pine beetle)

The eigth report in a series of catchment area analyses for Drax looks at the fibre sourcing area surrounding two compressed wood pellet plants operated by Pinnacle.

This part of interior British Columbia (BC) is unique in the Drax supply chain. Forest type, character, history, utilisation, natural challenges, logistics, forest management and planning are all very different to the other regions from which Drax sources biomass. Recently devasted by insect pest and fire damage, Arborvitae Environmental Services has produced a fascinating overview of the key issues and challenges that are being experienced in this region.

Figure 1: Catchment area map of the region [Click to view/download]

A positive response to natural disasters

Like the entire BC Interior, the area has suffered a devastating attack of Mountain Pine Beetle (MPB) damage over the last 20 years which has completely dominated every forest management decision and action. Within the catchment area, the MPB killed an estimated 157 million cubic metres (m3) between 1999 and 2014, representing 42% of the estimated 377 million m3 of total standing timber in the catchment area in 1999.  In addition, severe wildfires in 2018 burned an estimated 7.1 million m3.

These natural events have had a devastating impact on the forest resource. Harvesting increased significantly to utilise the dead and dying timber as lumber in sawmills whilst it was still viable.

Net carbon emissions in Canada’s managed forest: All areas, 1990–2017; illustrates that the impact of fires and insect damage have been far more significant, by hectares affected, than forestry activity; Chart via Natural Government of Canada

The Pinnacle pellet mills at Burns Lake and Houston were established alongside the sawmills to utilise the sawmill residues as there were no other viable markets for this material. These sawmills draw fibre from a large distance, up to 300 miles away. Therefore, the size of the catchment area in this piece of analysis is determined by the sourcing practices of the sawmills rather than the economic viability of low grade roundwood transport to the pellet mill (see Figure 1).

Damage to pine trees by Mountain Pine Beetle (MPB)

Utilising forest residues

The two mills producing high-density biomass pellets have provided an essential outlet for residue material that would otherwise have no other market and until very recently were supplied almost entirely by mill residuals. As the quantity of dead and dying timber has reduced and sawmill production has declined, the pellet mills are beginning to utilise more low-grade roundwood and forest residues (that are otherwise heaped and burned at roadside following harvest) to supplement the sawmill co-products.

Primarily State owned managed forests

The total land area in the catchment for Burns Lake and Houston is 4.47 million hectares (ha) of which 3.75 million ha is classed as forest land, 94% of the catchment area is public land under provincial jurisdiction. The provincial forest service is responsible for all decisions on land use and forest management on public land, in consultation with communities and indigenous groups, determining which areas are suitable for timber production and which areas require protection. Approximately 34% of the catchment area is not available for commercial timber harvesting because it is either non-forested or it has low productivity, and other operational challenges, or it is protected for ecological and wildlife reasons.

The Chief Forester for the province sets the Annual Allowable Cut (AAC) which determines the quantity of timber that can be harvested each year. Ordinarily this will be based on the sustainable yield capacity of the working forest area, but in recent years the MPB damage has necessitated a significant increase in AAC to facilitate the salvage of areas that have been attacked and damaged (see Figure 2).

Figure 2: Changes in Annual Allowable Cut 1980 to 2018 (Source: Nadina District FLNRORD) [Click to view/download]

The catchment area is in the Montane Cordillera ecozone and the Canadian Forest Service reports that between 1980 and 2017, the area of forest in the ecozone declined from 31,181,000 ha to 31,094,000 ha, a decline of 87,000 ha or 0.28 % of the forest area. Deforestation in the catchment area was estimated at 300 ha per year. Most deforestation in the ecozone occurred because of conversion to agriculture, as well as other contributing factors, such as mining, urban expansion and road construction (including forest roads).

The forest area is dominated by coniferous species (see Figure 3) predominantly lodgepole pine, spruce and fir (90% of the total area), with hardwood species (primarily aspen) making up just 8% of the total area.

Figure 3: Species composition of forest land in the catchment area.

Managing beetle damaged areas

The annual harvest volume was at a peak in the early part of the last decade at over 12 million m3 in 2011. This has now declined by around 4.5 million m3 in 2019 (see Figure 4) as the beetle damaged areas are cleared and replanted. The AAC and harvesting levels are expected to be reduced in the future to allow the forest to regrow and recover.

Figure 4: Annual change in harvest volume of major species

Future increases in forest growth rates

Historically, the forest area has naturally regenerated with self-seeded stands reaching a climax of mature pine, spruce, and Abies fir mixtures.  As the forest matured, it would often be subject to natural fires or other disturbance which would cause the cycle to begin again. Following the increase in harvesting of beetle damaged areas, many forests are now replanted with mixtures of spruce and pine rather than naturally regenerated. This is likely to lead to an increase in forest growth rates in the future and a higher volume of timber availability once the areas reach maturity (see Figure 5).

Figure 5: Forecast of future volume production

Timber markets in the catchment area are limited in comparison to other regions like the US South.  The scale of the landscape and the inaccessible nature of many of the forest areas limit the viability of access to multiple markets. Sawmills produce the highest value end-product and these markets have driven the harvesting of forest tracts for many years. Concessions to harvest timber are licensed either by volume or for a specific area from the provincial forest service. This comes with a requirement to ensure that the forest regrows and is appropriately managed after harvesting.

There are no pulp mills within the catchment area and limited alternative markets for the lowest grades of roundwood or sawmill residuals other than the pellet mills; consequently, the pellet mills have a close relationship with the sawmills.

Wood price trends

Prices for standing timber on public land are determined by the provincial government using results from public timber sales and set according to the species and quality of timber produced (from the highest-grade logs through to forest residuals). The lack of market diversity and challenging logistics mean that there is little competition for mill residuals and low-grade fibre. The price differential in end-product value between sawtimber and wood pellets ensures that fibre suitable for sawmill utilisation does not get processed by the pellet mill. A very small volume of larger dimension material can end up in a low value market when there are quality issues that limit the value for sawtimber (e.g. rotten core, structural defects) but this represents a very small proportion of the supply volume. There is no evidence that pellet mills have displaced other markets within this catchment area.

Read the full report: Catchment Area Analysis: Pinnacle Renewable Energy’s Burns Lake & Houston Mills.

This is part of a series of catchment area analyses around the forest biomass pellet plants supplying Drax Power Station with renewable fuel. Others in the series can be found here. 

What is biomass?

21 August 2020

Sustainable bioenergy
Illustration of a working forest supplying biomass

What is biomass?

In ecological terms, biomass refers to any type of organic matter. When it comes to energy, biomass is any organic matter that can be used to generate energy, for example wood, forest residues or plant materials.

How is biomass used?  

Biomass used and combusted for energy can come in a number of different forms, ranging from compressed wood pellets – which are used in power stations that have upgraded from coal – to biogas and biofuels, a liquid fuel that can be used to replace fossil fuels in transport.

The term biomass also refers to any type of organic material used for energy in domestic settings, for example wood burned in wood stoves and wood pellets used in domestic biomass boilers.

Biomass is organic matter like wood, forest residues or plant material, that is used to generate energy.

Where does biomass come from?

Biomass can be produced from different sources including agricultural or forestry residues, dedicated energy crops or waste products such as uneaten food.

Drax Power Station uses compressed wood pellets sourced from sustainably managed working forests in the US, Canada, Europe and Brazil, and are largely made up of low-grade wood produced as a byproduct of the production and processing of higher value wood products, like lumber and furniture.

Biomass producers and users must meet a range of stringent measures for their biomass to be certified as sustainable and responsibly sourced.

Key biomass facts

Is biomass renewable?

 Biomass grown through sustainable means is classified as a renewable source of energy because of the process of its growth. As biomass comes from organic, living matter, it grows naturally, absorbing carbon dioxide (CO2) from the atmosphere in the process.

It means when biomass is combusted as a source of energy – for example for heat or electricity production – the CO2 released is offset by the amount of CO2 it absorbed from the atmosphere while it was growing.

Fast facts

  • In 2019 biomass accounted for 6% of Great Britain’s electricity generation, more than 1/6 of the total generation of all renewable sources
  • There is about 550 gigatonnes of biomass carbon on Earth in total. Humans make up around 1/10,000th of that mass.
  • Modern biomass was first developed as an alternative for oil after its price spiked as a result of the 1973 Yom Kippur War
  • The International Energy Agency (IEA) estimates bioenergy accounts for roughly 1/10th of the world’s total energy supply

Biomass is a renewable, sustainable form of energy used around the world.

How long has biomass been used as a source of energy?

Biomass has been used as a source of energy for as long as humans have been creating fire. Early humans using wood, plants or animal dung to make fire were all creating biomass energy.

Today biomass in the form of wood and wood products remains a widely used energy source for many countries around the world – both for domestic consumption and at grid scale through power stations, where it’s often used to replace fossil fuels with much higher lifecycle carbon emissions.

Drax Power Station has been using compressed wood pellets (a form of biomass) since 2003, when it began research and development work co-firing it with coal. It fully converted its first full generating unit to run only on compressed wood pellets in 2013, lowering the carbon footprint of the electricity it produced by more than 80% across the renewable fuel’s lifecycle. Today the power station runs mostly on sustainable biomass.

Go deeper

Read next: What is reforestation and afforestation?

What is climate change?

Sustainable business
Climate change

What is climate change?

Climate change refers to the change in weather patterns and global temperature of the earth over long periods of time. In a modern context, climate change describes the rise of global temperatures that has been occurring since the Industrial Revolution in the 1800s.

What causes climate change?

While there have been natural fluctuations in the earth’s climate over previous millennia, scientists have found that current-day temperatures are rising quicker than ever due to the excessive amount of carbon dioxide (CO2) and other greenhouse gasses being released into the atmosphere.

Key climate crisis facts

An excess of CO2 in the atmosphere accentuates something called the ‘greenhouse effect’. As CO2 traps heat in the earth’s atmosphere, it warms the planet and causes a rise in average global temperature. International efforts, such as the Paris Climate Accords, are dedicated to ensuring temperatures do not rise 2 degrees Celsius above pre-industrial levels, which could lead to catastrophic conditions on the planet.

In the modern context, climate change describes the rise of global temperatures occurring since the Industrial Revolution in the 1800s.

How do humans contribute to climate change?  

Industries such as transport, agriculture, energy and manufacturing have traditionally relied on the use of coal, oil and other fossil fuels. These fuels, when combusted or used, emit large amounts of CO2 into the atmosphere, further advancing the greenhouse effect and contributing to climate change.

Human reliance and consumption of these products mean today CO2 levels are the highest they’ve been in 800,000 years.

Why are rising temperatures harmful to the planet?

Our planet has a history of experiencing periods of extreme weather conditions – for example the last Ice Age, which finished 12,000 years ago. However, the rapid rise in temperatures seen today is harmful because a hotter planet completely affects our natural environment.

A steep rise in global temperature can melt ice sheets and cause higher sea levels which can, in turn, contribute to more extreme storms and even threaten entire islands and coastal communities. As the planet warms, extreme weather events, such as bushfires could become more common, which can destroy homes, impact agriculture and degrade air quality, while entire ecosystems, habitats and animal and insect species could also be threatened by climate change. 

What can be done to mitigate the effects of climate change?

Reducing CO2 emissions is a key way of slowing down the pace of climate change. To do so, industries across the global economy must decarbonise to become less dependent on fossil fuels, such as coal and petrol, and adopt new lower carbon energy sources.

Decarbonisation will rely on a number of factors, including a technological response that sees the development and implementation of carbon neutral and carbon negative ways of creating heat, electricity and fuels, including the use of innovations such as carbon capture and storage (CCS).

There is also a need for a policy and governmental response that promotes investment in new cleaner technologies and disincentivises dirtier industries through mechanisms like the carbon tax. Countries and economies will need to work collaboratively to achieve common, climate-oriented goals that will also enable smaller scale action to be taken by individuals around the world. 

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The science making new discoveries in forests

22 July 2020

Sustainable bioenergy
Weyerhaeuser tree nursery in the US South

Scientific research isn’t all test tubes and lab coats – sometimes it’s bark and soil. It might be a world away from the image of a sterile laboratory, but the world of forestry is one that has seen significant scientific progress since the 18th century, when it first emerged as an area of study.

The development of environmental sciences and ecology, as well as advances in biology and chemistry mean there are still new discoveries being made – from trees’ ability to ‘talk’ to each other through underground fungi networks, to forests’ positive impact on mental health.

Fostering greater awareness and understanding of fragile forest ecosystems such as the cypress swamps of the Atchafalaya Basin in Louisiana, forestry has also allowed for the improvement of working forests — landscapes planted to grow wood for products and services that often avoid the use of fossil fuel-based alternatives.

Cypress forests in the Atchafalaya Basin in Louisiana are an example of a forest landscape where the suitable management practice is protection, preservation and monitoring

Cypress forests in the Atchafalaya Basin in Louisiana are an example of a forest landscape where the suitable management practice is protection, preservation and monitoring

By enhancing the genetic stock, tree breeding ensures seedlings and plants are better adapted to their environment (soil, water, temperature, nutrient level, etc.). Science can now help trees to grow more quickly, storing more carbon. It can also give trees better form — straighter trees can produce more saw-timber which can, in turn, lock more carbon in buildings made predominantly or partially of the natural, renewable product that wood is.

But more than just uncovering surprising insights into the ins and outs of our natural world, forestry science is contributing to a far bigger goal: tackling climate change.

The science of forests

When the scientific study of forests first emerged in 18th century Germany, it was with the aim of sustainability in mind. Industries were concerned forests wouldn’t be able to provide enough timber to meet demand, so research began into how to manage them responsibly.

Forestry today encompasses much more than just providing saw logs and the research going into it remains driven by the same goal: to ensure sustainability. Its breadth, however, has grown.

The UK Forestry Commission’s research and innovation strategy highlights the scope it should cover: “It must be forward-looking to anticipate long-term challenges, strategic to inform emerging policy issues, and technical to support new and more efficient forestry practices.”

Pine trees grown for planting in the forests of the US South where more carbon is stored and more wood inventory is grown each year than fibre is extracted for wood products such as biomass pellets

Being able to deliver on this breadth has relied on rapid advances in technology – including taking forestry research into space.

The technology teaching us about trees

As in almost every industry, one of the major drivers of change in forestry is data, and the ability to collect data from forests is getting more advanced.

At ground level, techniques like ‘sonic tomography’ allow foresters and researchers to ‘see’ inside trees using sound waves, measuring size, decay and overall health. This, in turn, offers a bigger picture of forests’ wellbeing.

At the other end of the scale, satellites and mapping technology are playing a major role in advancing a macro view of the world’s forests – particularly in how they change over time. As well as a potent tool in monitoring and helping fight deforestation, satellite images have revealed there is nine per cent more forest on earth than previously thought.

Space satellite with antenna and solar panels in space against the background of the earth. Image furnished by NASA.

The European Space Agency’s Earth Explorer programme will go a step further and use radar from satellites to penetrate the forest canopy, measuring tree trunks and branches rather than just the area covered by forest. Determining the volume of wood in forests around the planet will effectively enable researchers to ‘weigh’ the world’s forest biomass.

The masses of data these advances in tech are providing, is playing a major role in how we manage our forests, including how we can use them to fight global warming.

Taking on the climate crisis

Forests are one of the key defences against climate change – so much so they’re included in the Paris Agreement. Trees’ abilities to absorb carbon dioxide (CO2) has long been established knowledge. Thanks to what climate scientists call IAMs or integrated assessment models, we  now know how much they can extract from the atmosphere and how long they can continue to do so, as CO2 levels rise.

One optimistic hypothesis says trees will take in more CO2, as the levels rise. To test this, researchers in the UK are blasting controlled sections of a forest  with CO2 to increase its density by 40%, representing expected global levels by 2050. By tracking how trees react they hope to highlight the role they can play as carbon sinks.

Science also suggests they could not only help slow climate change, but actively fight it. The research considers that as well as absorbing CO2, trees are reported to emit gases that reflect sunlight back into space, ultimately contributing to global cooling.

However, planting more trees isn’t necessarily the only answer. In places experiencing drought such as the western US, thinning forests can reduce competition and allow healthier trees capable of absorbing more oxygen to flourish.

The increasing body of research on forests’ impact on climate change could prove vital in shaping both the forestry industry and national governments’ approaches forests. However, as a science, forestry could be considered to be in its infancy. At this crucial time for the planet’s future, forestry is becoming one of the most important environmental sciences, but a lot more attention, investment and research and development are required if we are able to fully understand and manage the world’s forest resources. We have barely scratched the surface.