Rural sewage treatment apparatus

Abstract

The invention provides a rural sewage treatment apparatus, comprising a regulating tank, an integrated sewage treatment device and reinforced wetland. The regulating tank comprises a regulating tank water inlet pipe and a regulating tank water outlet pipe and is used for regulating the water quality and water volume of sewage; the integrated sewage treatment device comprises an anoxic zone, an anaerobic zone, an aeration zone, a settling zone, an aeration system and a sludge backflow system, wherein the anoxic zone is arranged in the inner cavity of the anaerobic zone, the upper part of the anoxic zone is communicated with the inner cavity of the anaerobic zone, the bottom of the anoxic zone is provided with an anoxic zone water inlet pipe used for introduction of sewage, the anaerobic zone is located at the periphery of the anoxic zone, a flow baffle is arranged between the anaerobic zone and the aeration zone, the bottom of the aeration zone is provided with an aeration disc, a three-phase separator is arranged at the outlet of the settling zone, and an overflow weir is mounted at the upper part of the outlet of the settling zone; and the reinforced wetland is of a trapezoid tank structure and successively comprises, from top to bottom, an impervious layer, a gravel cushion layer, a filter material layer and a soil layer.

Description

technical field [0001] The invention relates to the technical field of sewage treatment environmental protection devices, in particular to a rural sewage treatment device. 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 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. The collection and treatment of rural sewage has already imminent. [0003] The current rural sewage treatment mainly has the following problems: ① Most of the sew...

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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

[0004] The domestic sewage integrated device proposed in the Chinese patent "A Micro-dynamic Treatment Device for Rural Domestic Sewage" (201120079408.4) adopts an inverted A 2 O Sewage treatment process technology, simple structure, low cost, suitable for domestic sewage treatment of every household in rural areas, but this patented device has the following defects: 1. The anoxic zone and anaerobic zone are set separately, and the floor area is large; 2. The biogas in the anaerobic zone is not recycled, which poses a safety hazard; 3. The biogas in the anaerobic zone is not recycled, which wastes resources; 4. The top of the anoxic zone and anaerobic zone is a horizontal structure, which is not conducive to the recovery of biogas; 5. Sedimentation The bottom of the zone is a horizontal structure, which is easy to deposit sludge on the bottom edge of the sedimentation zone, which is not conducive to cleaning; 6. The blower and sludge return pump are placed inside the integrated device, which is not easy to operate and maintain

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