What are the technological characteristics of the

2022-07-26
  • Detail

What are the technological characteristics of food processing sewage treatment equipment

oil separator is a treatment structure that uses the difference between the specific gravity of oil and water to separate and remove suspended oil with large particles in sewage. The grease in the waste water is collected by the oil collecting pipe and then discharged. Suspended solids and other impurities settled in the oil separation tank accumulate in the sludge hopper at the bottom of the tank and are regularly pumped away by the environmental sanitation department. The wastewater after oil separation treatment overflows into the drainage channel and is discharged out of the pool for subsequent treatment

2. Sewage regulation

as the water quality and quantity of quick-frozen food processing wastewater fluctuate greatly, it is necessary to strengthen regulation to stabilize the water quality and quantity of sewage, so as to ensure the effect of subsequent biochemical treatment

3. Hydrolytic acidification reaction

as the organic concentration of this kind of sewage is not very high, according to the company's experience in the treatment of low concentration organic sewage, anaerobic digestion treatment can be avoided, and only hydrolytic acidification process can be used. The bacteria that play a role in the hydrolytic acidification process are hydrolytic bacteria and acid producing bacteria, both of which do not need dynamic aeration under anaerobic conditions, because the cleaning method: use a wrench to tighten the real fixing screw behind the oil pump, and the hydrolytic acidification tank can partially degrade the organic matter under the condition of no energy consumption, reducing the operating cost; At the same time, the acidolysis bacteria can transform the macromolecular refractory organic matter into the small molecule biodegradable organic matter, and improve the treatment effect of the subsequent aerobic treatment unit. The time required for aerobic biochemistry can be greatly shortened by adopting the auxiliary process of the national policy on hydrolytic acid; At the same time, the treated effluent quality is better, which not only saves investment, saves operation cost, but also improves environmental benefits

4. Aerobic contact oxidation reaction

biochemical treatment is mainly through aerobic treatment. When sufficient dissolved oxygen is provided in the sewage, most of the organic matter in the sewage is removed by the adsorption and degradation of aerobic microorganisms

the aerobic biological treatment methods of wastewater are mainly divided into activated sludge method and biofilm method, both of which are commonly used at home and abroad and the process is relatively mature. According to different biofilm attachments, biofilm process can be divided into biological rotating disc, biofilter and contact oxidation process. With the development of chemical industry, biological fillers are constantly updated. From the original plastic honeycomb fillers to soft fillers and then to semi soft fillers, contact oxidation method shows its advantages more and more. Because contact oxidation has abundant biological phases, especially in low concentration sewage treatment, contact oxidation gradually replaces activated sludge process

the contact oxidation method has the following characteristics:

1. It is rich in biofacies: there are abundant dissolved oxygen and organic matter in the contact oxidation tank, which accelerates the mass transfer process of organic matter under the effect of the violent mixing of air and water with mud. In fact, the membrane profit is not high. The renewal of water and biofilm is conducive to the biological proliferation of microorganisms, so the biofacies on the biofilm are very rich. There are bacteria, Jersey bacteria, filamentous fungi, protozoa and metazoa, forming a rich and stable food chain of organic matter - bacteria - protozoa and metazoa

2. Biomass with high concentration: the biological filler has a large specific surface area. Under the condition of uniform gas distribution and sufficient aeration intensity, the filler is covered with active biofilm, forming a huge main structure of biofilm, which is conducive to maintaining the purification function of biofilm. According to statistics, the biomass in the contact oxidation tank is about 3-7 times that of the activated sludge process

3. Simple process flow, reliable equipment operation and simple operation: the contact oxidation method has rich biofacies and high concentration of biomass, has high volume load in operation, and can adapt to the impact of high load, with less sludge generation. Because the settling performance of biofilm carrier is much better than that of activated sludge, it is not easy to cause sludge bulking when filamentous bacteria are attached to the membrane. It has certain dephosphorization and denitrification capacity and can ensure the effluent quality. Basically, there is no need for excess sludge to return, which is easy to manage, does not produce mosquitoes and flies, does not emit odor, is not easy to block, and operates smoothly. The filler has strong corrosion resistance, low cost, small volume, light weight, strong adaptability and good treatment effect

4. It has a strong ability to withstand the impact load of changes in sewage quality and quantity, and has a great buffer effect on pH and toxic substances

5. Sedimentation tank

sedimentation is used to remove suspended solids in water. The removal of SS in sewage mainly depends on sedimentation. The sedimentation tank is composed of five parts: inlet area, outlet area, sedimentation area, sludge storage area and buffer area. The function of the inlet and outlet areas is to keep the inflow and outflow of water flow uniform and stable, so as to improve the sedimentation efficiency. The sedimentation area is the main part of the tank. The sludge storage area is the place for storing sludge, which plays the role of storage, concentration and discharge. The buffer zone is between the sedimentation zone and, more importantly, the sludge storage zone. The function of the buffer zone is to prevent the water flow from taking away the sludge settled at the bottom of the tank

Copyright © 2011 JIN SHI