Slaughtering sewage treatment equipment

        From the slaughterhouse wastewater pens, leaching, slaughtering and other plant floor washing, scalding, dissection, non-staple food processing, washing oil, it has a large amount of water, water is not uniform, high concentration, impurities and suspended solids, goodbiodegradability.

        The two main methods of slaughterhouse wastewater pretreatment for flotation and filtration (pore size 1 ~ 5mm), mainly used in the wastewater treatment station of air quantity is small, the disadvantages are complicated equipment, difficult management, high operation cost, poor sanitation; pretreatment, sieve is mainly used for slaughterhouse wastewater in the waste water consumption management convenient, stable operation. Organic matter in slaughterhouse wastewater is the main protein and fat, this kind of material is a large molecule long chain organic compounds to be aerobic bacteria generally used directly in the biodegradation process, generally by the action of enzymes is decomposed into amino acids, carbohydrates and other organic molecules by aerobic bacteria before using therefore, it is very necessary in the slaughterhouse wastewater treatment process equipment in the setting of hydrolysis acidification.

A lot of slaughterhouse wastewater treatment, natural ecological treatment, biological treatment, chemical treatment are applied, all kinds of technology has its advantages and limitations, should according to the characteristics of water quality, treatment and discharge requirements best slaughterhouse sewage treatment equipment and process selection and comprehensive consideration of economic and management factors, and pay attention to different slaughter wastewater treatment process the combined use of. For example, the main structure can be anaerobic, aerobic treatment, supplemented by natural ecological treatment, so as to ensure the quality of water, but also to save energy, reduce operating costs. At present many small water slaughter wastewater treatment station, in the current environmental protection investment under the condition of less, should be more efficient, energy saving, intensive, large-scale, easy management direction to reduce processing costs to choose the slaughterhouse wastewater treatment equipment and process. Strengthen the maintenance and management of the slaughterhouse wastewater treatment station to ensure the normal operation of the wastewater treatment plant.

        There is a large amount of pig manure wastewater, offal waste and animal oil, so the concentration of organic matter, nitrogen and phosphorus in sewage water is very high. The system used in this project is a combination of anaerobic, anoxic and aerobic biological process, which can achieve the purpose of removing COD, BOD, N, P at the same time. It is equipped with the pre-treatment device (solid-liquid separation, sand, oil separation) and biological purification treatment, so as to meet the environmental discharge standards.

        The process is as follows:

        High concentration wastewater from a slaughterhouse sewage sump by ditch inflow, and the coarse and fine two grid interception sundries in sewage. Then, the sewage pump is lifted to the hydraulic screen, and the solid-liquid separation is carried out, and then flows into the anaerobic reactor. In order to improve the efficiency of anaerobic digestion, the anaerobic reactor was divided into three grids. The first two grids were upflow anaerobic digestion tank, and the third grid was anaerobic filter. The anaerobic effluent was mixed with the dilute sewage in the intermediate water tank to regulate the ratio of BOD to COD, which was increased from 0.27 to 0.35. The mixed sewage enters the anoxic tank, and the three-dimensional elastic filler is arranged in the anoxic tank to increase the biomass in the anoxic tank and improve the removal rate. The upper part of the anoxic tank is provided with an oxygen tank for aerobic treatment. Finally, the treated water enters the biological purification tank and is discharged into the river around the city after further purification. Process flow see figure below.

        Main technical parameters:

        In order to realize the low cost, low energy consumption, low operation cost and high removal rate of the target, in addition to aerobic solid-liquid separation and spray device is provided with a small power sewage pump, the rest were built in the underground, the use of hydraulic drop water, artesian artesian water. The reasonable combination of anaerobic, anoxic and aerobic biological treatment of three levels, the main technical parameters:

        (1) pool: 25m, residence time of 12 hours, underground.

        (2) hydraulic screen 4.8m stainless steel sieve plate, ground.

        (3) sand tank: 4m, half floor.

        (4) anaerobic digester: 100M, residence time of 4 days, underground. Anaerobic filter: 50m, residence time of 2 days, underground.

        (5) intermediate pool: 5m, residence time of 5 hours, underground.

        (6) anoxic pool: 100M, residence time of 4 days, underground.

        (7) spray oxygen tank: 25m, residence time of 12 hours, ground.

        (8) water and biological purification tank: 300m, stay for 8 days.