The major product made by biogas installation, is a biofertilizer — a slime remaining after full fermentation of initial raw material. It has no smell, does not contain harmful microorganisms and eggs of helminths.
The slime can be divided on two fractions: liquid and firm. Both that and another are fertilizer. The firm fraction is more convenient for packing up, storing and transporting. That is, division of a slime into fractions is meaningful, at great volumes and sales to remote customers.
Before utilization biofertilizing is planted with water at 20-60 with times. Norms of utilization of 500-1000 litres of undiluted fertilizing on hectare. From one cubic metre of volume of a reactor a day 40 litres of fertilizings turn out. It means, that from the smallest installation with a reactor 3 cubic metre from October till March will accumulate 7200 litres fertilizings which should be stored somewhere. They will suffice for fertilizing 7 — 15 hectares. Therefore the basic problem with biofertilizings is their storage and selling in the winter.
