METHOD FOR CLEANING ANIMAL FARM EFFLUENTS AND PRODUCTION OF BIOMASS Russian patent published in 1994 - IPC

FIELD: agriculture. SUBSTANCE: method involves subjecting manure to the first stage of anaerobic fermentation, dividing it into liquid and thick fractions, dispatching thick fraction to hydrolysis, directing thick fraction of hydrolyzate into bioreactor for growing of yeast, separating the yeast suspension, subjecting condensed yeast to plasmolysis, thus producing protein-vitamin feed additive. Liquid fraction produced in the first fermentation stage and liquid fraction produced after separation of yeast are directed to the second fermentation stage. The resulting biogas is cleaned of ammonia and separated into methane and carbon dioxide. The liquid fraction, carbon dioxide and ammonia water produced during cleaning of biogas are used for growing first microalgae then macroalgae. Biomass of algae is separated and used as feed additive. Thick residues produced during anaerobic and aerobic fermentation are subjected to spasmolysis and also used as feed additive. EFFECT: higher efficiency. 1 dwg