Underground sewage treatment equipment

With the continuous deepening of my country's opening up to the outside world, my country's tourism and real estate industries are booming, and high-end hotels and villa communities have sprung up. However, high-end hotels and villa communities are often far away from urban sewage treatment plants, which brings inconvenience to the centralized treatment of domestic sewage. . In order to protect the environment and benefit future generations, Tongji University has successfully developed a series of sewage treatment equipment. This equipment adopts the world's most advanced biological treatment process and integrates the removal of wastewater, water, and wastewater into one unit. It is currently the most efficient sewage treatment equipment. It is widely used in high-end hotels. Domestic sewage treatment in villa communities and residential communities replaces septic tanks with very low removal rates and the treated water cannot meet the national comprehensive discharge standards. Field application shows that the series of sewage treatment equipment is a kind of equipment with very ideal treatment effect and easy management. Working Principle
The removal of organic pollutants and ammonia nitrogen by fiberglass underground sewage treatment equipment mainly relies on the biological treatment process in the equipment. The working principle is that in the first stage, due to the high concentration of organic matter in the sewage, the microorganisms are in a state of lack of air. At this time, the microorganisms are facultative microorganisms. They convert and decompose the organic ammonia in the sewage into organic carbon and use organic carbon as the electron donor to convert ˉˉ Convert to, but also utilize part of organic carbon sources and synthesize new cellular materials. Therefore, the stage pool not only has a certain organic matter removal function, reducing the organic load of the subsequent aerobic pool to facilitate nitrification, but also relies on the higher concentration of organic matter present in the raw water to complete denitrification and ultimately eliminate nitrogen eutrophication. pollute. At the first level, since the concentration of organic matter has been greatly reduced, there is still a certain amount of organic matter and a relatively high level. In order to further oxidize and decompose organic matter, and at the same time, nitrification can proceed smoothly when carbonization is completed, an aerobic biological contact oxidation tank with low organic load is set up at the stage. There are mainly aerobic microorganisms and aerobic bacteria (nitrifying bacteria) in the stage pool. Among them, aerobic microorganisms decompose organic matter and autotrophic bacteria (nitrifying bacteria) use the inorganic carbon produced by the decomposition of organic matter or nitrogen in the air as a nutrient source to convert the ˉ in the sewage into ˉˉ. The effluent part of the stage pool is returned to the stage pool. It provides electron acceptors for the stage pool and ultimately eliminates nitrogen pollution through denitrification.
1. Overview
Fiberglass underground sewage treatment equipment adopts the world's advanced biological treatment process, which integrates the removal of water, bacteria and water. It is widely used in high-end hotels, villa communities and residential areas. Domestic sewage and similar industrial organic sewage treatment have replaced septic tanks with very low removal rates and the treated effluent cannot meet the national comprehensive discharge standards. Field application shows that the series of sewage treatment equipment is a kind of equipment with very ideal treatment effect and easy management.
2. Scope of application
Treatment of domestic sewage in hotels, nursing homes, hospitals, schools, residential communities, villa communities, etc.
The treatment of production wastewater from aquatic products processing plants, livestock processing plants, fresh milk processing plants, etc.
3. Product Features
The fiberglass underground sewage treatment equipment can be buried below the surface, and the surface can be used as greening or square land. Therefore, the equipment does not occupy surface area, does not need to build a house, and does not require heating. Keep warm.
The series of sewage treatment plants consists of secondary pools, made of steel structure and shallowly buried. The steel structure pool adopts the first interpenetrating network anti-corrosion coating in China for anti-corrosion. It is a kind of rubber network and plastic network interpenetrating each other to form an interpenetrating network polymer. It is resistant to acid, alkali, salt, gasoline, kerosene, aging and abrasion resistance, and can bring rust and prevent rust. Generally, after the equipment is painted with this coating, its anti-corrosion life can reach more than 10 years.
The biological treatment process in the series of sewage treatment equipment adopts a push-flow biological contact oxidation tank. Its treatment is better than that of a complete mixed type or a two- or three-stage series complete mixed biological contact oxidation tank. And it is smaller than the activated sludge tank, has strong adaptability to water quality, good impact resistance, stable effluent water quality, and will not cause sludge expansion. At the same time, a new type of elastic three-dimensional filler is used in the biological contact oxidation tank. It has a large actual specific surface area and is easy for microorganisms to film and remove. Under the same organic load conditions, it has a higher removal rate of organic matter than other fillers and can improve the air quality. The solubility of oxygen in water. Since a biological contact oxidation tank is used in the biological treatment process, the volume load of the filler is relatively low, and the microorganisms are in their own oxidation stage, so the amount of mud produced is less. In addition, the moisture content of the sludge produced by the biological contact oxidation tank is much lower than that of the sludge produced by the activated sludge tank. Therefore, the amount of sludge produced after the sewage passes through a series of sewage treatment equipment is small, and generally only needs to be discharged once a day or so. In addition to adopting conventional blower silencer measures (such as vibration isolation pads, silencers, etc.), the
series sewage treatment equipment also installs new sound-absorbing materials on the inner wall of the blower room, so that the noise during operation of the equipment is lower than decibels, reducing the impact on the air blower. The influence of the surrounding environment.
The series of sewage treatment equipment is equipped with a fully automatic electrical control system and an equipment damage alarm system. The equipment has good reliability, so it generally does not require dedicated management and only requires monthly and quarterly maintenance and upkeep
4. Process flow
Description of sewage treatment process flow
This project adopts biofilm method anoxic and aerobic treatment process./That is, anoxic + aerobic biological contact oxidation method is a mature biological treatment process. It has the advantages of high volume load, fast biodegradation speed, small floor space, low infrastructure investment and operating costs. It can replace the ordinary activated sludge method used in the original urban sewage treatment, and is especially suitable for the treatment of medium and high concentration industrial wastewater. , and saves investment, takes up less space, and has high treatment efficiency. The process uses a combination of biological contact oxidation and precipitation, and the process is mature and reliable. The sludge is precipitated in the equipment, and part of the sludge is further oxidized and decomposed due to the action of dissolved oxygen , a part of the gas is lifted into the sand settling tank, and the system sludge only needs to be pumped regularly in the sand settling tank. The working procedures of the main control equipment such as the fan and submersible sewage pump in the system are input into the machine to achieve automatic operation to reduce operations workload, and can reduce unnecessary man-made damage.