FIELD: agriculture.
SUBSTANCE: invention relates to processing of liquid manure with the solid phase content of 6-10% into a gaseous energy carrier - biogas with energy content of not less than 20 MJ/m3, asepticized stabilized products - enriched with nitrogen drain - effluent with ammonia nitrogen content of not less than 500 mg/l, and a solid fraction with high content of humus-forming substances (lignin, hemicellulose), nitrogen and phosphorus-biosludge. Initial manure is subjected to aerobic auto-thermal hydrolysis, anaerobic acidification and anaerobic processing into combustible biogas, biosludge and effluent, wherein the liquid-phase processing into the combustible biogas and effluent is carried out using attached methanogenic microflora. Solid-phase processing into combustible biogas and biosludge is carried out using weighted methanogenic microflora. Solid-phase processing is combined with suppressing the biosludge and contact clarification of supernatant. Aerobic auto-thermal hydrolysis and liquid-phase processing are carried out in the conditions of mutual heat exchange with arrangement of anaerobic acidification zone inside the liquid-phase processing zone at hydraulic circulation between the zones of aerobic auto-thermal hydrolysis and anaerobic acidification, as well as the zones of liquid-phase processing and contact clarification of supernatant. Effluent of the liquid-phase processing zone is used for thermal stabilization of the solid-phase processing zone and pre-heating of the manure. Device consists of an aerobic bioreactor, an anaerobic acidification bioreactor, a thickener, a liquid-phase and a solid-phase anaerobic bioreactors. Liquid-phase anaerobic bioreactor is equipped with a developed surface of heat exchange in the form of a finned tubes system located inside the loading, inner cavity of which is hydraulically connected with the aerobic bioreactor working space.
EFFECT: technical result is higher specific output of commercial biogas, improved consumer properties of the effluent and the biosludge.
2 cl, 3 dwg
