Small slaughterhouse wastewater treatment equipment

Process flow of small-scale slaughter wastewater treatment equipment:
The sewage from the slaughterhouse is treated with a grid (net) to remove hair, skin, floating slag, and large suspended particles from the sewage, and then flows into the oil separation tank. After removing most of the oil and mud, it enters the regulating tank, where the water quality and quantity are adjusted to ensure the normal operation of subsequent treatment facilities. The water from the regulating tank is pumped up to the laminar flow air flotation sedimentation integrated machine. The suspended solids (SS) in the water are removed in advance, with a removal rate of over 90%. The effluent enters the integrated sewage treatment equipment, which consists of a hydrolysis acidification tank, a secondary contact oxidation tank, and a sedimentation tank. The sewage is treated in the hydrolysis acidification tank
Performing acidification treatment, converting high molecular weight organic matter into low molecular weight organic matter through anaerobic bacteria; After being hydrolyzed and acidified in the tank, it flows into the contact oxidation tank for biochemical reaction before entering the sedimentation tank. The effluent is filtered and disinfected to meet the discharge standards
Application analysis:
Considering the water quality characteristics of slaughter wastewater and comparing the advantages and disadvantages of various treatment methods, it is concluded that the most economical and effective treatment technology for slaughter wastewater at present is mainly based on biological methods, supplemented by necessary physical, chemical and other methods for pretreatment. For example, the secondary SBR process route mainly using biological treatment method has better treatment effect. In northern regions, especially in economically underdeveloped areas, considering factors such as low temperatures, small land requirements, and low operating costs, deep well aeration method is the preferred method.
Anaerobic biological treatment has low cost, but cannot effectively remove ammonia nitrogen. Therefore, in situations where high effluent quality is required, aerobic treatment or chemical methods are usually used to remove ammonia nitrogen after anaerobic treatment in order to meet water quality discharge requirements. Aerobic methods can not only achieve high CODcr removal rates, but also remove nitrogen and phosphorus, but the cost is high. Therefore, for high concentration slaughter wastewater, anaerobic biological treatment is usually first used, followed by aerobic treatment. By combining the advantages of anaerobic and aerobic biological methods, high CODcr removal rates can be achieved while removing nitrogen and phosphorus, and reducing costs.
The small-scale slaughter wastewater treatment equipment adopts biological methods, and the issue of recycling can be considered. After certain treatment, activated sludge can be used as animal feed [24], and can also recover protein and fat from slaughter wastewater. The product can be used as animal feed and can also produce biogas and harmless fertilizers. The goal of developing energy, turning waste into treasure, and promoting the development of agriculture and animal husbandry is a sustainable development project with ecological balance and virtuous cycle. The experience in treating slaughter wastewater has good reference value for the treatment of urban and livestock manure pollution.