Pig farm sewage purification process
With the rural livestock and poultry breeding industry from individual free-range to intensive farming, the waste generated by livestock and poultry farming has become one of the main sources of environmental pollution in rural areas of China. The following describes the sewage treatment process of the pig farm. Meat slaughtering and processing enterprises emit a certain amount of wastewater during production, mainly from the process of rinsing, rinsing, slaughtering and floor washing, scalding, dissection, repairing, non-staple food processing, washing oil and grease processing. The production wastewater is rich in oil and a large number of biodegradable organic matter and pathogenic bacteria. If discharged directly without treatment, it will seriously pollute the water environment. Treatment of 2 000 m3/d of slaughter wastewater was carried out by a treatment process consisting of hydrolysis acidification / three-stage biological contact oxidation . After debugging and running, it has achieved good processing results. The hydrolysis acidification tank and the tertiary contact oxidation pond are the core of the treatment process. The hydrolysis acidification tank is agitated with a suitable air, and the tank is suspended and a certain amount of activated sludge is cultured. The contact oxidation tank adopts a three-stage push-flow type to remove organic pollutants step by step, and the total contact residence time is 12 . 7 h , the total hydraulic retention time is 15 . 3 h . The air volume distribution is set to 55% of the primary contact oxidation tank, 25% of the secondary contact oxidation tank , and 20% of the tertiary contact oxidation tank . The fillers suspended in each biological pool are all three-dimensional elastic fillers. The special wire drawing and silk yarn making process are used to insert and fasten the yarn on the corrosion-resistant and high-strength center rope. The elastic filler is excellent in material selection and process formulation. Moderately, the filaments are uniformly arranged in a radiant state, and a single suspension-type elastic three-dimensional filler is prepared. The elastic three-dimensional filler can be uniformly stretched in a three-dimensional manner in an effective area, so that the gas, water and biofilm are thoroughly mixed. Infiltration contact exchange. In addition, the elastic hanging film is quick and easy to remove the film, and the running yarn can play an excellent cutting action on the air bubble, so that the large bubble is cut into small bubbles, and the gas-liquid contact area is increased to promote the transmission of oxygen, thereby improving the treatment effect. . to sum up: The slaughter wastewater can effectively remove most of the suspended solids, animal and vegetable oils and other pollutants through the pretreatment measures such as grid, oil separation and air flotation, and remove some organic substances to ensure the normal operation of the subsequent treatment section and reduce the burden of biological treatment. The biological treatment adopts a process mainly consisting of hydrolysis acidification / three-stage biological contact oxidation, high organic matter treatment load, impact load resistance, and stable effluent water quality. The whole process design is sound and reasonable, and the process continuity is strong. After commissioning, the treatment system has long-term operation under high COD concentration, which can maintain good treatment effect. The removal rates of COD , BOD5 and SS are above 95% , and the effluent quality is better than the discharge standard. Elastic filler product features: 1. Elastic yarns with flexibility and moderate rigidity are arranged in a stereoscopic uniform radiation state. The multi-layered air bubbles are effectively cut, and the gas, water and biofilm are fully contacted and exchanged, which leads to turbulent flow and improves. The oxygen transfer rate and oxygenation power efficiency promote the metabolism of microbes and enhance the treatment efficiency of wastewater. 2 , elastic yarn strips have large variability, no blockage, no agglomeration, large specific surface area, low power consumption, long life and low cost. Guangzhou Luyi Environmental Protection Equipment Co., Ltd. Body building products : Body care products, 4-Aminobenzamidine Dihydrochloride,Bulk Fluorogesterone Acetate Powder,Bulk Fluocinolone Acetonide Powder,Clomiphene Citrate Powder,
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