METHANE ACCUMULATION TANK Russian patent published in 1998 - IPC

FIELD: organic waste disposal. SUBSTANCE: tank has casing separated by partitions into acidic, neutral, alkaline, and methane fermentation chambers interconnected through substrate-passage ports and having gas cavities in their top sections, stirring devices installed in chambers, biogas enrichment column separated by horizontal perforated partitions into biogas collector and sections filled with grainy immobilization charge, the column communicating with methane fermentation chamber through connecting pipes. Biogas-outlet pipe is attached to top part of column and has hydraulic gate connected through pipeline to bottom part of column. EFFECT: improved design of installation. 2 dwg