Biffa operates over 90MW of generation capacity at 34 operational sites throughout the UK that utilise landfill gas to generate electricity, including:
- 34 generation locations
- 42 independent grid connections
- 94 gas engines
- 3 direct factory feeds to Biffa customers
We have developed this portolio significantly over the past 25 years and have delivered a number of novel accomplishments during this period:
Gas to Energy Innovations
- One of the first operators to treat landfill gas to improve performance
- A pioneer amongst LFG operators in the UK to add 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 UK generator of electricity from landfill gas, producing output of 530GWh last financial year. This represented approximately 10% of total electricity generated from landfill gas in the UK.
The key performance highlights of our portfolio include:
- Scale; 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 proven track record; and
- Strong relationship with regulatory authorities.
Biffa utilises a detailed technical gas resource assessment modelling programme (‘Gassim 2’) to analyse and estimate the quantity of landfill gas that exists in any particular landfill site. Also, 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 reflect diversion targets set by the EU Landfill Directive;
- Waste degradation rates based on forecast waste filling period and moisture content;
- Site gas collection efficiency modified to reflect any anticipated changes in site management practices; and
- Impact on gas recovery of planned capital expenditure.
We have identified and are implementing a number of bespoke gas treatment opportunities where, in particular, silicon compounds have begun to feature as significant contaminants in the gas fuel feed 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 down time;
- Extend oil life; and
- 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 the sites. Surplus generation is sold into the wholesale market.