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Taihu Lake region village sewage treatment and Duantou creek water environment repair method

A technology for sewage treatment and water environment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as environmental pollution in villages and river banks, and achieve significant ecological and environmental benefits , easy to promote, simple to build effects

Inactive Publication Date: 2013-01-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of environmental pollution in villages and riversides around Taihu Lake and propose a treatment method with high efficiency and low energy consumption

Method used

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  • Taihu Lake region village sewage treatment and Duantou creek water environment repair method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Surrounding villages along the lake 48m 3 / d domestic sewage flows into the above treatment units in turn. The grid spacing is 40mm; the effective volume of the regulating pool is 10.00m 3 , the total residence time is 5.00h; the effective volume of the anaerobic tank is 16.00m 3 , the total residence time is 8.00h; the effective volume of the contact oxidation tank is 12.00m 3 , the total residence time is 6.00h; the effective volume of the sedimentation tank is 3.00m 3 , the total residence time is 1.50h; the effective volume of the sludge tank is 2.16m 3 , the total residence time is 5d; the water depth of the aerated fish pond is 1.0m, and the water area is 240.00m 2 , 108 silver carp, 18 silver carp, and 36 crucian carp are stocked in the fish pond; the long semi-axis of the purified floating island is 3.0m, the short semi-axis is 2.0m, and the total area of ​​the floating island is 48.00m 2. CODcr of sewage dropped from 183.00mg / L to 28.00mg / L, total nitroge...

Embodiment 2

[0027] Villages around the lake 65m 3 / d domestic sewage flows into the above treatment units in turn. The grid spacing is 40mm; the effective volume of the regulating pool is 12.95m 3 , the total residence time is 4.78h; the effective volume of the anaerobic tank is 20.18m 3 , the total residence time is 7.45h; the effective volume of the contact oxidation tank is 15.52.00m 3 , the total residence time is 5.73h; the effective volume of the sedimentation tank is 3.71m 3 , the total residence time is 1.37h; the effective volume of the sludge tank is 2.16m 3 , the total residence time is 5d; the water depth of the aerated fish pond is 1.0m, and the water area is 279.50m 2 , 126 silver carp, 21 silver carp, and 42 crucian carp are stocked in the fish pond; the long semi-axis of the purified floating island is 3.2m, the short semi-axis is 2.3m, and the total area of ​​the floating island is 55.90m 2 . CODcr of sewage dropped from 192.53mg / L to 26.30mg / L, total nitrogen dropp...

Embodiment 3

[0029] Surrounding villages along the lake 82m 3 / d domestic sewage flows into the above treatment units in turn. Among them, the grid spacing is 40mm; the effective volume of the regulating pool is 15.44m 3 , the total residence time is 4.52h; the effective volume of the anaerobic tank is 23.85m 3 , the total residence time is 6.98h; the effective volume of the contact oxidation tank is 19.00m 3 , the total residence time is 5.56h; ​​the effective volume of the sedimentation tank is 4.37m 3 , the total residence time is 1.28h; the effective volume of the sludge tank is 2.16m 3 , the total residence time is 5d; the water depth of the aerated fish pond is 1.2m, and the water area is 273.33m 2 , 123 silver carp, 20 silver carp, and 41 crucian carp are stocked in the fish pond; the long semi-axis of the purified floating island is 3.3m, the short semi-axis is 2.3m, and the total area of ​​the floating island is 54.67m 2 . CODcr of sewage dropped from 179.24mg / L to 26.28mg / L...

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Abstract

The invention belongs to the technical field of sewage treatment, in particular to a Taihu Lake region village sewage treatment and Duantou creek water environment repair method. The method comprises the following steps of: after sewage and rain are collected by a town rain header pipe, joining in a regulating reservoir after the sewage and the rain flow to a grid via an overflow flood discharge pipe; lifting to an A / O integration-type brick-built sewage treatment facility via a water pump; in the facility, enabling the sewage to be subjected to anaerobic tank and contact aerobic tank treatment, flowing into a sedimentation tank for solid and liquid separation; causing parts of supernate to flow back to the anaerobic tank for denitrification; lifting lower-layer sludge at a fixed time to a sludge tank; after carrying out aerobic digestion in the sludge tank, externally conveying precipitates or composting; after precipitate effluent is collected by a clear water tank, externally discharging to an aeration fishpond for biological strengthening treatment; and finally, overflowing and discharging via an overflow dam. With the method disclosed by the invention, village domestic sewage treatment, creek ecological environment recovery and aquatic product efficient culture are combined into a whole. The method has the advantages of simpleness in construction, small investment and obvious ecological environment benefit and is easy for popularizing, and no surrounding lands of a river are occupied.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to the sewage treatment of villages in the surrounding area of ​​Taihu Lake and the in-situ restoration of the water environment of Duantou Riverside. Background technique [0002] There are many rivers in the water network area of ​​Taihu Lake in southern Jiangsu. People are used to calling small rivers (or artificial small canals) related to agricultural production and people's daily life "rivers". In recent years, with the implementation of the national "village-to-village" transportation plan and the continuous expansion of the construction of new countryside, rural transportation has been greatly developed, and the riverside carrying transportation in the village has gradually lost its original shipping function. The measures of "filling the banks and building roads" caused most of the river banks to be filled or cut off in the middle, and became dead-end r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张文艺郑泽鑫占明飞李仁霞戴如娟
Owner CHANGZHOU UNIV
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