Slaughtering wastewater is generally reddish-brown, with unpleasant fishy smell, containing a lot of pollutants such as blood, grease, hair, meat slices, bone chips, visceral debris, undigested food, feces, etc., and the content of solid suspended solids is high. Slaughtering wastewater has high organic content and good biodegradability, but high concentration of organic matter is not easy to degrade and it is difficult to treat. The nutrients in slaughter wastewater are mainly nitrogen and phosphorus, in which nitrogen mainly exists in the form of organic matter or ammonium salt, and phosphorus mainly exists in the form of phosphate.
1: coagulation method: 2: SBR method: 3: sequencing batch biofilm method: 4: aerobic biological treatment: 5: pressurized biological contact oxidation-coagulation sedimentation combined process: 6 two-stage high-speed upflow anaerobic sludge bed UASB method and dissolved air flotation-upflow anaerobic sludge bed method 7: hydrolytic acidification-biosorption regeneration-contact oxidation process 8: upflow anaerobic sludge bed filtration-