There is now little dispute amongst experts that our climate is changing and that this is due to the activities of humankind since the industrial revolution. As a property owner or occupier it hardly matters whether you agree with this assertion or not, much of the legislation relating to buildings will be influenced by climate change predictions and the need to reduce greenhouse gas emissions.
Received wisdom is that the increasing weight of legislation to improve the energy efficiency of buildings must be more expensive to occupiers than existing technologies. Biofuel CHP is an exception.
Biofuel CHP offers robust and reliable energy delivery, on demand and from renewable resources. It does not suffer from the vagaries of weather, unlike solar and wind technologies, and can produce both electricity and heat at low cost, unlike most biomass systems.
However, any combustion process produces emissions and these must be controlled to obtain the full environmental benefit from a Biofuel CHP plant. The emissions from compression ignition engines (diesels) that are usually the focus of legislation include the following: Oxides of Nitrogen (commonly called NOx); Oxides of Sulphur (SOx); Carbon Monoxide (CO); Total Hydrocarbons (HC) and; Particulate Matter (PM).
The quantity and components of exhaust emissions are greatly affected by the fuel used and most are significantly reduced by using vegetable oil fuel instead of fossil diesel. For example, the exhaust from a Biofuel CHP plant contains no SOx because the fuel has no sulphur content.
All emissions in the exhaust gas of a Biofuel CHP plant can be controlled by proper engine tuning and exhaust after-treatment methods.
A number of companies offer to convert engines to operate on biofuels, such as plant oils and waste cooking oils. However very few have considered the emissions produced by combusting these fuels or how to minimise them. We have carefully analysed how best to minimise emissions from our engines, at reasonable cost, and have developed an exhaust heat exchanger system which reduces the production of all regulated pollutants. | 
