Cationic polyacrylamide for cattle slaughtering wastewater treatment
Cattle slaughtering wastewater treatment industry brief introduction
With the continuous improvement of Chinese urban and rural residents' income level and living standard, consumption concept is gradually changing, and people's diet structure is changing from subsistence to scientific and healthy. Beef and mutton are more and more favored by consumers for their delicate, delicious, nutritious, low cholesterol content, so that the production prospects of beef and mutton are optimistic.
Cattle slaughtering and meat processing usually is synchronized, at the same time the slaughtering and meat processing wastewater effluent, including equipment cleaning wastewater, ground cleaning wastewater, slaughter offal cleaning wastewater and ketone body cleaning wastewater, thawing, clean cooking with meat processing wastewater, sewage system requires dealing with rear can into the water pipe network.
Characteristics of wastewater: The slaughtering wastewater discharged by the slaughtering factory contains a large amount of pollutants such as blood, grease, cow hair, visceral debris, undigested food and feces. Cattle slaughter wastewater high suspended solids content, variety, a high content of organic matter and suspended particles diameter sizes, can be good biochemical high concentrations of organic matter is not easy to degrade, processing is difficult, cattle slaughtering the nutrients in sewage is mainly nitrogen, phosphorus, nitrogen mainly exists in the form of organic matter or ammonium salt, and phosphorus mainly exists in the form of phosphate.
To sum up, the analysis shows that:
(1) The wastewater is mainly polluted by COD, BOD, ammonia nitrogen, SS and animal and vegetable oils;
(2) it belongs to typical organic and biochemical wastewater;
(3) Wastewater types: slaughtering wastewater and processing wastewater
In view of the characteristics of the wastewater from slaughtering cattle, it is mainly treated by pretreatment and biochemical treatment in two stages.
Cattle slaughtering wastewater treatment process
According to the design of 500m3 wastewater treatment project, considering the quality characteristics of cattle slaughtering wastewater and comparing the advantages and disadvantages of various treatment methods, the current economic and effective conventional treatment route of cattle slaughtering wastewater is as follows: The comprehensive treatment technology of "grid + collecting tank + hydraulic screen + regulating tank + primary sedimentation tank +A2O+ secondary sedimentation tank + three sedimentation tank" ensures that the wastewater can meet the design effluent requirements.