Patent ID: 6224646
Filing Date: 2001-05-01
Classification: C02F,C05F,Y02A,Y02P

Abstract:
A method of treating hog waste comprising:collecting hog waste containing suspended or dissolved solid content in a manure pit, said hog waste comprising manure, urine, feed, water, hooves and hair;promoting solubilization and odor reduction of the hog waste in the manure pit by distributing a mixture of enzymes and bacteria throughout the hog waste;pumping the hog waste containing suspended or dissolved solid content from the manure pit to a homogenization tank;homogenizing and mixing the hog waste under anoxic conditions byremoving waste from a bottom of the homogenization tank,operating a chopper pump to shred the removed waste; anddistributing the removed waste into the hog waste by returning the removed waste to the homogenization tank at a position above a top level of the hog waste in the homogenization tank; andremoving gases emitted from the hog waste during homogenization from the homogenization tank;pumping the homogenized waste from the homogenization tank into a reaction tank;reducing strength of the homogenized waste and odors from the homogenized waste and solubilizing and breaking down the homogenized waste into biomass material, CO.sub.2, nitrate and water byheating the waste to a temperature range of 40-70.degree. C. under anoxic conditions;incubating the waste at a temperature range of 40-70.degree. C. under anoxic conditions for a time period of 12-36 hours; andcirculating the homogenized waste while incubating the homogenized waste byoperating a pump to remove homogenized waste from a bottom of the reaction tank; anddistributing the removed waste into the hog waste by returning the removed waste to the reaction tank at a position above a top level of the homogenized waste in the reaction tank;pumping the treated waste from the reaction tank into a clarifier tank; andallowing the treated waste to separate into liquid material and solid material.