FIELD: agriculture.
SUBSTANCE: fertilizer contains nutritive substances for plants. Organic substances contained in liquid fertilizer composition are mineralized by at least 95% of amount of organic substances in wastes before being fermented in methane tank with resulting production of humus. Method involves feeding into outer chamber of coaxial methane tank liquefied and ground organic substances of wastes and providing sequential anaerobic fermentation thereof; heating and mixing mass under fermentation process with gas-and-liquid mixture; discharging resulting mass for producing fertilizer; withdrawing biogas from outer and inner chambers; introducing biogas contained in heated gas-and-liquid mixture from outer chamber into inner chamber in the form of dissipated jet streams for mixing of fermentable mass therein; providing first phase of anaerobic fermentation of liquefied and ground organic waste substances in outer chamber in acid medium at pH less than 7.0 until complete decomposition of all delivered and settled fermented organic waste substances of different densities is provided by active symbiosis of splitting (hydrolyzing) microorganisms accompanied with destruction thereby of complex compounds into simpler compounds and formation of fatty acids and weak biogas (carbon dioxide, hydrogen and hydrogen sulfide); introducing the latter into inner chamber for providing second phase of anaerobic fermentation in alkaline medium at pH exceeding 7.2 with following producing of fuel biogas by means of methanogenic bacteria. Apparatus has hermetically sealed reservoir, bottom and cupola with concentric partition having shape similar in plan to that of reservoir and adapted for dividing it into outer and inner chambers, branch pipes for supplying liquefied organic wastes and discharge of fermented sediments, means for mixing and heating fermented wastes and branch pipes for discharge of biogas from outer and inner chambers. Branch pipe for discharge of biogas from outer chamber is connected through gas line with suction pipe of injector, to pressure pipe of which is joined heat exchanger with heater.
EFFECT: improved quality of liquid mineralized organic fertilizer.
6 cl, 2 dwg
