Anoxic tank and sewage treatment system comprising same

Abstract

The invention relates to an anoxic pond and a sewage treatment system comprising the anoxic pond, the anoxic pond comprises an anoxic pond and a waterwheel driven biological rotating disc communicated with the anoxic pond through a lifting drainage pipe, the anoxic pond is arranged on a pond body and is provided with a water inlet pipe and the lifting drainage pipe, and a partition plate is arranged in the middle of the pond body. The tank body is divided into an upper regulating tank and a lower anoxic treatment tank by the partition plate, one end of the partition plate is provided with a water passage communicated with the regulating tank and the anoxic treatment tank, the water inlet pipe is arranged at the upper part of the regulating tank, and one end, far away from the water passage, of the bottom of the anoxic treatment tank is provided with a pump pit; a water suction pump is arranged in the pump pit, and the lifting drainage pipe is communicated with the water suction pump. The device is small in occupied area, easy and convenient to operate, few in power equipment, low in energy consumption and high in sewage treatment efficiency, stable operation of the equipment can still be guaranteed through multi-point backflow arrangement under the condition that the sewage treatment volume is small, and the device is suitable for treatment of rural domestic sewage.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an anoxic tank and a sewage treatment system including the same. Background technique [0002] Due to the scattered distribution of rural domestic sewage, villages or settlements are often used as basic units for decentralized treatment. At present, the treatment equipment used in rural domestic sewage still follows the "anaerobic-anoxic-aerobic" activated sludge biological treatment mode in urban sewage treatment, which is proportionally scaled down according to urban domestic sewage treatment equipment. However, due to The total amount of domestic sewage in rural villages is small, so even after the equipment is scaled down, it is difficult to maintain the continuous operation of the activated sludge treatment process, resulting in unstable operation of anoxic denitrification and deodorization. In addition, due to the low concentration of pollutants in rural sewage,...

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Problems solved by technology

At present, the treatment equipment used in rural domestic sewage still uses the "anaerobic-anoxic-aerobic" activated sludge biological treatment mode in urban sewage treatment, which is proportionally reduced according to the urban domestic sewage treatment equipment. However, due to The total amount of domestic sewage in rural villages is small, so even after the equipment is scaled down, it is difficult to maintain the continuous operation of the activated sludge treatment process, resulting in unstable operation of anoxic denitrification and deodorization, and there is still an area occupied by the equipment Large scale, complex construction, multiple power equipment, high energy consumption, complex maintenance and many other problems. In addition, due to the low concentration of rural sewage pollutants, the "anaerobic-anoxic-aerobic" activated sludge biological system of urban sewage is still used There are bound to be problems such as high energy consumption and easy collapse of the sludge system.

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