& Song Dynasty. Overview of slaughtering wastewater
Song Dynasty slaughtering wastewater mainly comes from: flushing water of livestock manure discharged from feedlots before slaughter, ground flushing water containing blood and livestock waste discharged from slaughterhouses, and high temperature containing a large amount of pig hair discharged during scalding. Sewage containing gastrointestinal contents discharged from water anatomy workshops, grease sewage discharged from oil refining workshops, etc. In addition, there is cooling water from the refrigeration machine room and domestic sewage discharged from workshop sanitary equipment, boilers, office buildings, etc.
Slaughter sewage contains a large amount of blood, fur, minced meat, viscera, undigested food, feces and other pollutants. The concentration of suspended solids is very high. The water is reddish brown and has an obvious fishy smell. It is a Typical organic wastewater. Generally, it does not contain heavy metals and toxic chemicals. Sewage is rich in protein and oil, and has a high salt content. Slaughter sewage is an organic sewage with high suspended solids that is easily biodegradable. The quality and quantity of sewage vary widely.
At present, the treatment of this type of sewage adopts biological treatment processes, including aerobic, anaerobic, facultative and aerobic treatment systems. However, no matter what biological treatment process is used, full attention must be paid to the pretreatment process. A linting machine, a grille, a grease trap, a regulating tank or a sedimentation tank should be set up to minimize the content of suspended solids and grease entering the biological treatment structure. Ensure the structure is functioning properly.
Introduction to the process flow of slaughtering sewage treatment:
The sewage from the slaughterhouse in Song Dynasty flows through the grille (mesh) to remove the hair, skin, scum and large suspended particles in the sewage, and then flows into the grease trap to remove Most of the grease and mud then enter the regulating tank. After the water quality and quantity are adjusted in the regulating tank, the normal operation of subsequent treatment facilities is ensured. The water that passes through the regulating tank is lifted by a pump to the advection air flotation and sedimentation machine. The suspended solids in the water are removed in advance, with a removal rate of more than %. The effluent enters the integrated sewage treatment equipment. The integrated sewage treatment equipment consists of (hydrolysis acidification tank, secondary contact oxidation tank, and sedimentation tank). The sewage is acidified in the hydrolysis acidification tank. , through anaerobic bacteria, macromolecular organic matter is converted into low molecular organic matter, which flows into the contact oxidation tank through hydrolysis and acidification tank for biochemical reaction, and then enters the sedimentation tank. The effluent is filtered, disinfected and discharged to meet the standards
Weifang slaughtering sewage treatment equipment is anti-corrosive, durable and of reliable quality