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Biffa Gas to energy plant

Landfill Gas to Energy

Biffa operates over 90MW of generation capacity at 34 operational sites throughout the UK. To convert landfill gas to energy, we use:

  • 34 generation locations
  • 42 independent grid connections
  • 94 gas engines
  • 3 direct factory feeds to Biffa customers

We have developed this portfolio significantly over the past 25 years and have delivered several novel accomplishments during this period:

Landfill Gas to Energy Innovations

  • One of the firstoperators to treat landfill gas to improve performance
  • A pioneer amongstLFG operators in the UK in the practice of adding ORC to improve generation efficiency
  • Pioneered the transmission of LFG generated electricity by private wire under the RO
  • Amongst the first LFG operators to use a flexible PPA to sell power
  • Registered self-supply on-site and secured ROCs within 3 months of implementation of the RO

BLFG operates over 90MW of installed generation capacity at the 34 BLFG operated sites and is the second largest generator of electricity from landfill gas in the UK, producing an output of 530GWh in the last financial year. This represented approximately 10% of total electricity generated from UK landfill gas. The key performance highlights of our portfolio include:

  • A renewable energy infrastructure business with near term opportunity to materially increase generation output on an international platform
  • Secure access to long term gas resources
  • ‘Best-in-class’ operational performance
  • Experienced management and operational teams with a proven track record
  • Strong relationships with regulatory authorities

Landfill Gas to Energy Process

Biffa utilises a detailed technical gas resource assessment modelling programme (‘Gassim 2’) to analyse and estimate the quantity of the landfill gas that exists in any particular landfill site. It also measures the key operating parameters that govern the quantity of landfill gas that is ultimately captured and converted to electricity. Gassim 2 forecasts gas production at a particular site based on a number of determining factors, including:

  • Historical volume of waste
  • Forecast waste tonnages, taking into account future site expansions and contractions, and the impact of environmental legislation
  • Waste composition assumptions that reflect diversion targets set by the EU Landfill Directive
  • Waste degradation rates based on the forecast waste filling period and moisture content
  • Site gas collection efficiency modified to reflect any anticipated changes in site management practices
  • Impact on gas recovery of planned capital expenditure

Gas clean-up We have identified and are implementing bespoke gas treatment opportunities where silicon compounds, in particular, have begun to feature as significant contaminants in the gas fuel feed, and which have a negative impact on engine performance. The treatments target gas where the removal of certain compounds (silicon, VOC compounds) would:

  • Improve engine efficiency
  • Increase engine load factor by reducing maintenance and associated downtime
  • Extend oil life
  • Lead to an overall uplift in generated output

Contracts with Industrial Customers BLFG has entered into several agreements with third-party industrial customers relating to the purchase of electricity generated by BLFG at some of its generating sites. The agreements grant customers exclusive rights to the electricity generated at these sites. Surplus generation is sold into the wholesale market. For more information about landfill gas monitoring or producing energy from waste, get in touch with our friendly team today.