Because the waste water from meat food processing contains oil, because the specific gravity of oil is smaller than that of water, it is easy to separate the oil from the water by air flotation, and it is more reasonable to treat the separated water food and wastewater by biochemical treatment. It is best to use the diversion aeration biofilter for biochemical treatment. The diversion aeration biofilter enables sewage to be aerated twice, precipitated twice and filtered twice in the same treatment tank, which solves the technological process that other sewage treatment needs four tanks to complete, especially under the condition of continuous water inflow, intermittent aeration and activated sludge reflux are realized, and the whole operation is not idle. Its advantages are more prominent than traditional treatment methods, and the treatment effect is particularly remarkable. In August 2119, it was listed as an "innovative project" by the Ministry of Science and Technology; In February 2119, the product was listed as "Catalogue of Environmental Protection Technologies Encouraged by the State" by the Ministry of Environmental Protection. In May, 2111, it was recognized as a "national key new product" by the Ministry of Science and Technology, the Ministry of Environmental Protection, the Ministry of Commerce and the General Administration of Quality Supervision, Inspection and Quarantine. In July, 2112, it was listed as "environmental protection technology encouraged by the state" by the Ministry of Environmental Protection.

diversion biological aerated filter+microbial generator. The diversion biological aerated filter (BAF) fully draws lessons from eight design methods, such as BAF method, contact oxidation method, biofilm method, intermittent aeration method, artificial rapid filtration method, sedimentation separation method, nitrification and denitrification method, and water supply rapid filtration method, and combines the two-stage or three-stage sewage treatment process to develop a new sewage treatment process and technology. The diversion biological aerated filter has been used in Beijing, Shandong, Hebei, Guizhou, Shanxi, Sichuan, Inner Mongolia, Heilongjiang, Jiangsu, Jilin, Henan, Hubei, Tianjin, Xinjiang and other places in China, involving sewage treatment in the fields of life, hospital, chemical industry, slaughter, food, flax, alcohol, pharmacy, mustard tuber and so on. A large number of applications have proved that the CODcr of effluent quality is generally below 21mg/L, and the lowest is 5.95 mg/L; BOD5 is generally below 11mg/L, with a minimum of 3.51 mg/L; SS is generally below 21mg/L, and the lowest is 6.55 mg/l.