Sewage treatment equipment

Abstract

The invention discloses sewage treatment equipment. The sewage treatment equipment comprises a regulating tank, a primary anaerobic tank, a secondary anaerobic tank, an aerobic tank, a sedimentation tank as well as a conveying device used for conveying sewage in the regulating tank to the bottom of the primary anaerobic tank, wherein the primary anaerobic tank and the secondary anaerobic tank arecommunicated, and the sewage in the primary anaerobic tank can only flow into the bottom of the secondary anaerobic tank unidirectionally; a second overflow port is formed in the top of the secondaryanaerobic tank and located above the aerobic tank, and a height difference exists between the second overflow port and the aerobic tank; the aerobic tank and the sedimentation tank are communicated, and the sewage in the aerobic tank can only flow into the sedimentation tank unidirectionally. An aerator is omitted, and electromechanical equipment of the whole system is only provided with a small lift pump, so that power consumption of sewage treatment is reduced greatly. The sewage is collected and treated nearby, a collecting pipe is short, treatment efficiency is high, and the actual demandof rural sewage treatment is met.

Description

technical field [0001] The invention belongs to sewage treatment technology, and in particular relates to sewage treatment equipment, which is especially suitable for domestic sewage treatment in rural households. Background technique [0002] In recent years, with the development of the economy, the discharge of domestic sewage in rural areas is increasing, but the construction of corresponding sewage treatment facilities cannot keep up with the speed of economic development. It is estimated that the total amount of domestic sewage produced in rural areas is about 9 billion tons every year, and it is increasing continuously, causing serious pollution of rivers, lakes and groundwater in rural areas, and eutrophication of water bodies is becoming more and more serious. [0003] The current decentralized sewage treatment system is mainly buried integrated treatment equipment, and the following problems generally exist: [0004] (1) The technical route is unreasonable and divo...

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Problems solved by technology

[0006] (2) The designed treatment scale is too large, and the actual amount of sewage collected is very small

Most villagers use well water, kitchens and toilets do not have perfect sinks and sewer pipes, and the washed water is sprinkled in the yard or on the roadside, so it is difficult to collect, which will affect the design scale of the sewage treatment station

However, in the actual design, the design units or designers did not consider the actual situation, resulting in the design scale of some rural domestic sewage treatment projects far exceeding the actual local sewage production, and the sewage treatment plants (stations) operate at ultra-low loads or even intermittently. Achieve good environmental and economic benefits

[0008] (3) Construction quality is unqualified

[0009] Most rural domestic sewage treatment projects are small in scale, and large-scale construction companies with high qualifications are not willing to participate. As a result, the actual construction team level of rural domestic sewage projects is uneven, the project quality is unqualified, and structures and equipment are seriously leaking. directly affect the operation of the project

[0010] (4) High power consumption, heavy operation and maintenance workload, difficult to ensure long-term effective operation

[0012] From the above analysis, it can be seen that although the current urban sewage treatment technology can meet the effluent standard, the cost of sewage treatment is relatively high, and it is not suitable for rural areas.

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