Special adoption of the technology to a small biogas plant for rural areas and small amount of feedstock in the range of 50 to 250 kwel. We digest various types of feedstock derived from agricultural waste, industrial waste, household waste and energy crops. The range of experience covers especialy fatty, protein rich and nitrogen rich feedstock – each of them needs a different digestion operation. The digestion of big amounts of fibrous materials in our used unique prozess has been done for many years.