Method for sewage treatment in compound tower-type ecological filtering pool

A sewage treatment method and technology of ecological filter, which are applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. higher question

Inactive Publication Date: 2012-06-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Rural domestic sewage is treated differently from urban domestic sewage. Urban residents live in a concentrated manner, which is conducive to the establishment of a complete sewage pipe network to collect sewage for centralized treatment. However, rural residents are relatively scattered, and the investment in building a large-scale sewage pipe network is relatively large, and the long-distance Sewage transportation is more serious, and the sewage collection rate is not high, so it is not suitable to adopt the method of urban sewage treatment for centralized treatment
The vast rural areas in my country mainly adopt decentralized small-scale domestic sewage ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Use sewage pipes to collect domestic sewage from farmers in a rural area in Jiangsu (about 100 households, 350 people, the collection rate is 90%, and the sewage production is about 30 tons / day), and flow into the grid well by gravity, and pass through the thick and fine grids respectively grid to remove suspended matter.

[0024] Domestic sewage water quality: COD=150~350 mg / L, TN=10~30mg / L, TP=3~8 mg / L.

[0025] (2) The sewage treated by the grid flows into the acidification hydrolysis tank by itself. The hydraulic retention time of the sewage in the acidification hydrolysis tank is 24 hours. The supernatant overflows into the catchment area and is pumped into the composite tower by the submersible sewage pump controlled by the liquid level In the treatment pool of the type ecological filter treatment stage.

[0026] The acidification hydrolysis tank is based on the ordinary three-format septic tank, and an anoxic zone is added behind the first grid to reduce the...

Embodiment 2

[0041] (1) Use sewage pipes to collect domestic and production sewage from farmers in a rural area of ​​Yunnan (about 150 households, 500 people, about 200 dairy cows (dry method), the collection rate is 80%, and the sewage production is about 50 tons / day) , self-flow into the grid well, and remove suspended matter through the thick and thin grids respectively.

[0042] Domestic sewage water quality: COD=400~750 mg / L, TN=10~100mg / L, TP=1~15 mg / L.

[0043] (2) The sewage treated by the grid flows into the facultative filter by itself. The hydraulic retention time of the sewage in the facultative filter is 72 h. The supernatant overflows into the catchment area and is pumped into In the treatment pool of the compound tower ecological filter treatment stage.

[0044] On the basis of ordinary facultative filters, various areas are added and refined, which are divided into pre-sedimentation area, anoxic area, anaerobic area, aerobic area and catchment area. Calcium-containing mat...

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Abstract

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method for sewage treatment in a compound tower-type ecological filtering pool. The method disclosed by the invention comprises the following steps of: collecting the domestic sewage of residents by a sewage tube network, removing suspended substances in the sewage via thick and thin grids, and pre-treating the sewage; pumping the sewage in the compound tower-type ecological filtering pool formed by connecting a one-stage high-level water distribution anaerobic filtering pool and a multi-stage earthworm trickling filtering pool in series via a sewage pump; automatically flowing, collecting and distributing the sewage via the action of gravity; and achieving the purpose of purifying the sewage via the synergistic effect of microorganisms, filter material, animals (earthworms) and plants in the filtering pool. The method for sewage treatment in a compound tower-type ecological filtering pool disclosed by the invention combines with traditional sewage treatment process and land treatment method, has the advantages of being good in water yielding effect, simple in operation and management, small in floor area, low in construction cost and the like, and has good economic effects and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to a method for treating dispersed sewage by using an ecological filter. Background technique [0002] The outbreak of cyanobacteria in the lake water body leads to the decrease of the transparency of the lake, the degradation of the ecosystem structure and function, the water quality and water shortage, and causes serious economic losses. The main reason is the input of nutrients such as N and P from the rivers entering the lake. Domestic sewage (including urban and rural domestic sewage), aquaculture wastewater, agricultural non-point sources and soil erosion in the watershed are the main forms of lake exogenous pollution, bringing a large amount of N and P nutrients into the lake. In the watersheds of different regions, the input ratios of various forms of N and P are different. For example, studies have shown that in the Taihu Lake ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 郑正聂耳罗兴章杨晓英李因梁王东
Owner FUDAN UNIV
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