Slaughter wastewater mainly comes from processes such as washing and rinsing of enclosures, washing of floors, scalding, dissection, processing of non-staple food, washing of oil, etc. Its water quality characteristics are:

① Generally reddish brown in color, with an unpleasant fishy odor, containing a large amount of blood stains, oily substances, hair, meat scraps, bone fragments, internal organs, undigested food, feces and other pollutants, with a high content of suspended solids.

② The organic matter content is high and the biodegradability is good. The high concentration of organic matter is not easy to degrade, making it difficult to treat. The nutrients in the wastewater are mainly nitrogen and phosphorus, with nitrogen mainly existing in the form of organic matter or ammonium salts, and phosphorus mainly existing in the form of phosphates.

Given the "three highs" characteristics of slaughter wastewater, it is difficult to achieve discharge standards using a single wastewater treatment technology. It is necessary to comprehensively adopt different treatment technologies to completely remove slaughter wastewater pollutants and ensure that all pollution indicators of the wastewater meet national standards for discharge. Daquan Water Treatment has a certain mature technology in the treatment of slaughter wastewater, accumulating a complete set and a large number of unit process technology experience. Its slaughter wastewater treatment equipment is specifically designed for the treatment of slaughter wastewater.

Principle of Slaughter Wastewater Treatment Equipment:

Due to the presence of a certain amount of large floating debris (blood stains, fur, impurities, etc.) in the slaughter wastewater, a grid is first used to intercept it to ensure the normal operation of subsequent equipment. This is because the slaughter wastewater contains large organic molecules such as blood stains and oils, which are difficult to degrade when directly introduced into the aerobic system. Therefore, the effluent from the grid enters the septic tank. The existing septic tank in the slaughterhouse can achieve certain treatment effects, but the current effluent concentration is still high and carries some oil. In order to reduce the load on subsequent treatment facilities, it is considered to add an oil separation tank at the front end to remove oil.

Due to working hours, the drainage cycle of a slaughterhouse is different from other sewage discharge cycles. It mainly discharges at night, so a large regulating pool must be set up to regulate the water quality and quantity to ensure the normal operation of the entire facility and reduce the impact load on subsequent facilities. The sewage is collected by the regulating pool and pumped into the subsequent treatment facilities.

After being treated by the front-end septic tank, the sewage still contains most of the large molecular organic pollutants, so it needs to be further degraded into small molecular substances to prepare for subsequent aerobic biochemistry. Considering the excessive levels of ammonia nitrogen and total phosphorus in the sewage, it is necessary to establish an aerobic anoxic alternating operation environment to achieve the effect of nitrification denitrification and phosphorus removal. Here, a hydrolysis acidification tank is set up to reflux the effluent from subsequent aerobic treatment to the hydrolysis acidification tank.

After passing through the hydrolysis and acidification tank, the sewage enters the aerobic tank, which is divided into two sections. Its advantage is that in different aerobic sections, microorganisms present spatial distribution according to the environment, which is targeted and has better removal effect. After being treated by various biochemical treatment facilities in the front-end, the organic pollution load is greatly degraded.