METHOD OF PURIFYING WASTE WATER FROM THE CATTLE-BREEDING FARMS Russian patent published in 1996 - IPC

FIELD: cattle-breeding. SUBSTANCE: at the big swine-breeding farms where the manure is removed by the water washing off and the pourings so formed undergo the two-stage biological purification in the aeration tanks, said pourings are alkalized to settle phosphates using cultivated microorganisms. The pourings are then neutralized at the ammonia blowing stage. EFFECT: eliminated solid deposits in the pourings. 1 dwg