Rural domestic sewage treatment system

Abstract

The invention relates to a rural domestic sewage treatment system which comprises a sewage collection pipe network, a sewage regulating tank and a sewage comprehensive reaction sedimentation tank. The sewage collection pipe network is laid with a natural village as a unit, sewage is collected to the sewage regulating tank outside the village, and the sewage comprehensive reaction sedimentation tank comprises an anaerobic zone, an anoxic zone, a facultative zone, an aeration zone, a settling zone and a sand filtration zone which are separated by an oval outer wall, an arc-shaped flow-separating wall and a round inner wall. The anaerobic zone is located in an innermost part of the sewage comprehensive reaction sedimentation tank and on the inner side of the round inner wall. The anoxic zone is located between the round inner wall and the arc-shaped flow-separating wall. A sewage stirring and flow driving device is arranged below the water surface of the anoxic zone. The facultative zone is located between the round inner wall and the oval outer wall. The aeration zone is located between the arc-shaped flow-separating wall and the oval outer wall. The settling zone is located on the outer side of the oval outer wall and at the tail end of the aeration zone. The sand filtration zone is located on the outer side of the oval outer wall.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a rural domestic sewage treatment system. Background technique [0002] In recent years, my country's rural areas have gradually become richer, especially in the eastern and southeastern rural areas where the economy is relatively developed. The urbanization process is accelerating, people's living standards are constantly improving, and rural water consumption is gradually increasing. The increase. Due to the relatively backward construction of sewage treatment facilities, a large amount of untreated domestic sewage is directly discharged into rural rivers and ponds, and finally enters lakes, rivers and other receiving water bodies, which aggravates the eutrophication of the water environment and collects rural domestic sewage Processing is imminent. [0003] The current rural sewage treatment mainly has the following problems: ① Most of the sewage treatment uses integ...

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Problems solved by technology

[0003] The current rural sewage treatment mainly has the following problems: ① Most of the sewage treatment uses integrated sewage treatment facilities for each household, and the construction, operation and maintenance costs are relatively high; ② The construction of biogas digesters and their pipelines requires a certain capital cost; ③ The sewage volume of each household is small, and the gas production of the matching biogas tank is small, which cannot meet the living needs of a family of about four people. The built biogas tank has become a decoration, lacking maintenance and management; ④ biogas tank or sewage The treatment facilities occupy the homestead; ⑤The supernatant of biogas tanks and septic tanks or the treated sewage have no way out, causing secondary pollution

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