Non-powered domestic sewage treatment plant

Abstract

The invention discloses a non-powered domestic sewage treatment plant, comprising a reaction tank consisting of steel plates or glass reinforced plastics or plastic plates or brick-concrete constructions, wherein, the reaction tank is divided into an air water reinforced contact zone, a biological reaction zone, and a biofiltration zone; the air water reinforced contact zone is provided with a perforating water distributor, a perforating inclined plate, an air-supply pipe, a vent window, and an air suction duct; the biological reaction zone is filled with biological filling material; and the biofiltration zone is provided with one or more sets of slots, self-forming dynamic membrane filtration frames which can move up and down are inserted in the slots, and the water exit of the biofiltration zone is provided with a water outlet valve. The invention has the advantages of simple structure, small land occupation area, low investment, good processing effect, no need of power, no need of electric power, no need of operation cost, no need of person operation and management, and the like, and is suitable for villages and small towns, especially meeting the usage of domestic sewage treatment in remote mountain areas with relative backward economy and no guarantee of power supply.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an unpowered domestic sewage treatment device suitable for decentralized treatment of domestic sewage in small towns and rural areas. Background technique [0002] With the rapid development of society and economy, the ecological environment has also been destroyed, and natural water pollution and eutrophication have become increasingly serious, especially in some remote areas and small towns and rural areas with poor economic conditions. Sewage is not easy to be treated in a centralized manner. In addition, the living standards of these small towns and villages are relatively backward. The sewage of most residents and village farmers is discharged directly without any treatment or after simple treatment in septic tanks, which makes the natural environment even worse. The pollution of domestic sewage in small towns and rural areas has become an important problem that mus...

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Problems solved by technology

[0006] Constructed wetland sewage treatment methods have been widely used in small towns and rural areas due to their simple process structure, low investment, convenient operation and management, and low operating costs. Incomplete, low pollutant load, unstable operation, poor hydraulic performance and other shortcomings, affected by the environmental climate and seasons, the treatment effect is not ideal, it is difficult to meet the expected water quality requirements, and it may even become another new pollution source

[0007] For this reason, the inventor of this patent proposed a patent for a self-generated dynamic membrane bioreaction sewage treatment device on March 21, 2011, the patent application number: 201110067579. However, the sewage aerobic reaction process in this process device adopts the blast aeration method, which needs to be equipped with a power source and a certain operating cost. The remote rural mountainous areas with relatively backward conditions cannot be used normally, which also hinders its promotion and development

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