The UK's Anaerobic Digestion & Biogas Specialists
 
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Farm Biogas Plants

Seven farm biogas plants have recently been built in Southwest Scotland as part of a Scottish Executive research programme into diffuse pollution of bathing waters. The large amount of rainfall in the area, together with high numbers of livestock, impermeable soils and short river lengths all contribute to the risk of faecal indicator organisms (FIO) ending up in the water courses. The biogas plants have been integrated into the farms waste management systems.

The slurry is being collected in the dairies where it is pumped into a large reception tank, before entering into the digester. For the farmers, this has not only enhanced their waste management system, but it has also given them two valuable by-products. The gas is burnt in a biogas boiler which heats the digesters with surplus energy used for domestic heating, or running a generator to produce electricity. Digestate, the other by-product, is used by the farmers as a bio-fertiliser. There is a lot of research to be carried out into the use of this liquid by-product, however it is clear that the readily available nutrients will save the farmers money by not having to import such large quantities of mineral fertiliser, and making a carbon saving.