Functional advantages of sewage treatment equipment in slaughterhouses:
1. The complete set of equipment can be buried below the frozen layer or placed on the ground. The surface above the equipment can be used as greening or other land. There is no need for building, heating or insulation.
2. The two-stage biological contact oxidation treatment process adopts push-flow biological contact oxidation, and its treatment effect is better than the *mixed or two-stage series*mixed biological contact oxidation tank. It is smaller than the activated sludge tank, has strong adaptability to water quality, good impact load resistance, stable effluent water quality, and will not cause sludge expansion. The pool uses a new type of elastic three-dimensional filler with a large specific surface area, making it easy for microorganisms to hang and remove the film. Under the same organic matter load conditions, it has a high removal rate of organic matter and can increase the solubility of oxygen in the air in water.
3. The biochemical tank adopts the biological contact oxidation method. The volume load of the filler is relatively low. The microorganisms are in their own oxidation stage and the amount of mud produced is small. It only takes more than three months (90 days) to discharge the mud (using a fecal truck to pump or Dehydrated into mud cakes for export).
4. In addition to conventional high-altitude exhaust, the deodorization method of this underground domestic sewage treatment equipment is also equipped with soil deodorization measures.
5. The entire equipment processing system is equipped with a fully automatic electrical control system, which is safe and reliable in operation. Generally, it does not require special personnel to manage, and only needs to maintain and maintain the equipment in a timely manner.
The analysis of the treatment process of sewage treatment equipment in slaughterhouses is as follows:
1. Pretreatment: The pretreatment of slaughtering wastewater is the key to the effective operation of the entire system. The solid suspended matter in slaughtering wastewater is as high as 600-700mg/L. This type of suspended matter is a perishable organic matter and should be intercepted before entering the treatment system to prevent subsequent blockage of pipelines and equipment and extend the service life of slaughtering sewage treatment equipment. It can avoid the corrosion of suspended solid organic matter into dissolved organic matter, causing the concentration of CODcr and BOD5 in wastewater to increase.
2. Anaerobic part: The organic matter in slaughtering wastewater is mainly protein and fat, which is difficult to be directly utilized by general aerobic bacteria. In the biodegradation process, it is generally decomposed into small molecular organic matter such as amino acids and carbohydrates through the action of enzymes. Then it can be directly used by aerobic bacteria. The concentration of pollutants in wastewater is relatively high. Directly using aerobic processes to remove all organic matter will consume a large amount of electricity and will inevitably increase the operating costs of the system.
3. Aerobic part: The SBR process is an intermittent activated sludge system. Its basic feature is to achieve the removal of different organic matter at different times in the same reaction tank. The operation of a single SBR pool includes five basic processes: water inlet, reaction, sedimentation, water outlet and idle, and the cycle operates over and over again. This process does not require additional secondary sedimentation tanks and sludge return equipment. The process flow is simple and the treatment effect is good.