Distributed and structured town sewage pelletization treatment process and pelletization reactor

Abstract

The invention discloses a distributed and structured town sewage treatment pelletization reactor which comprises a reactor body, a BDR gas stripping backflow device, a titanium alloy aerator, an ultraviolet disinfection device, an ultrasonic solid-liquid separation device, an ORP oxidoreduction potentiostat, a biological enzyme adding device, an oilless silent air compressor and the like. The reactor body forms an anaerobic granular sludge-aerobic granular sludge-biological enzyme ternary coupling recycling water purification pelletization treatment process. The pelletization reactor is a biological compositing tank, and after anaerobic-aerobic-biological enzyme ternary coupling composting, discharged sludge contains rich enzymes, nitrogen, phosphorus, potassium and other nutrients and can be directly used as high-quality green organic fertilizer. Large-proportion BDR gas stripping backflow is adopted, the very small organic matter concentration gradient in the pelletization reactor is guaranteed, the unevenness of inflow water is eliminated, the problems about town sewage quality and water yield load impacts are solved, and the investment cost per ton of water is greatly reduced. The invention further discloses the distributed and structured town sewage pelletization treatment process.

Description

technical field [0001] The invention relates to the field of environmental protection and to the technical field of village and town sewage treatment, in particular to a distributed and structured village and town sewage pelletization treatment process and pellet reactor technology. Background technique [0002] my country is a large agricultural country, and nearly 90% of the country's total area is rural areas. According to estimates, the annual sewage discharge of villages and towns is as high as 30 million m 3 , BOD discharged into the environment is about 5.3 million tons / day, COD is about 8.6 million tons / day, total nitrogen is about 960,000 tons / day, and total phosphorus is about 140,000 tons / day, which is one of the main reasons for the deterioration of the water environment . [0003] The long-term urban-rural dual structure has led to an extreme imbalance between urban and rural areas in terms of sewage treatment. Statistics show that 96% of the villages have no...

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Problems solved by technology

[0006] The traditional activated sludge method is difficult to separate from the water because the bacteria micelles composed of microorganisms are in a loose state, resulting in suspended fine particles in the effluent and affecting the water quality. At the same time, the remaining activated sludge produced has a high moisture content and a large volume. serious pollution

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