METHOD AND PLANT FOR ANAEROBIC PROCESSING OF LIQUID ORGANIC WASTES Russian patent published in 2019 - IPC C02F9/14 C02F11/04 C02F3/28 F24C7/02 H05B6/64 B02C13/12 

FIELD: technological processes.

SUBSTANCE: invention relates to recycling concentrated organic substrates and can be used in agro-industrial enterprises and in housing and communal services. Method of anaerobic processing of liquid organic wastes includes their finely dispersed milling to fineness of not more than 0.1 mm, partial hydrolysis of organic substances, introduction of iron microparticles into the substrate formed by abrasion of steel needles in the vortex layer apparatus, heating of the substrate to temperature of 55 °C apparatus for microwave heating. Substrate from the UHF heating apparatus is directed into the vortex layer apparatus along a single circulation circuit of the substrate. Heat carrier with temperature of 60–70°C vortex layer heat exchanger-cooler is directed into heat exchanger-heater of UHF heating apparatus along heat carrier circulation circuit to accelerate heating of substrate. Then heated substrate with moisture content of 90–96 % and content of organic substance of not less than 20 kg/m³ is fed into an anaerobic digester for anaerobic fermentation. Plant for anaerobic treatment of liquid organic wastes contains methane tank 1, vortex layer apparatus 3, UHF heating apparatus 2. Apparatus for microwave heating 2 is equipped with heat exchanger-heater 5. Vortex bed 3 is equipped with heat exchanger-cooler 12. Apparatus for microwave heating 2 is hydraulically connected via pipeline 13 to reactor of vortex bed apparatus 3 through substrate circulation pump 8 and three-way valve 9 to form a single circulation circuit over substrate. Vortex layer apparatus 3 heat exchanger 12 is connected via pipeline 14 to heat exchanger-heater 5 of microwave heating device 2 via heat carrier circulation pump 7 to form a circulation circuit via heat carrier. Mortar tank 1 is connected to a single circulation loop through substrate by pipeline 15 via three-way valve 9.

EFFECT: invention increases efficiency of the process of anaerobic processing of organic wastes, improves rheological properties of the substrate and accessibility of nutrients for microorganisms, increase degree of decomposition of organic matter and output of end product – biogas, reduce period of starting methane, increase rate of formation and final output of methane, providing more complete decomposition of the substrate, reducing the volume of the bioreactor, reducing temperature fluctuations and improving stability of the process of anaerobic processing of organic wastes, and accelerating heating of the substrate.

2 cl, 1 dwg