Method and system for advanced treatment of centralized rural domestic sewage

A technology for domestic sewage and advanced treatment, applied in the field of water treatment, can solve problems such as damage to the rural ecological environment, difficult control, intermittent discharge, etc. Effect

Inactive Publication Date: 2012-09-19
FUDAN UNIV
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Problems solved by technology

[0003] Compared with foreign countries, China's rural domestic sewage has the characteristics of large volume, wide area, high concentration of organic matter, large daily variation coefficient, intermittent discharge, and difficult control. Untreated domestic sewage is discharged indiscriminately and enters the confluence pipeline together with rainwater , discharged into the nearby rivers, polluting rivers and lakes, seriously damaging the rural ecological environment, directly threatening the health of farmers and hindering the development of rural economy

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  • Method and system for advanced treatment of centralized rural domestic sewage
  • Method and system for advanced treatment of centralized rural domestic sewage
  • Method and system for advanced treatment of centralized rural domestic sewage

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Embodiment Construction

[0035] The concentrated rural domestic sewage treatment in Wujin District is carried out in Hujiatou, Minfeng Village, Luoyang Town, Wujin District, Changzhou City, using the process of composite ecological filter + surface flow constructed wetland.

[0036] Composite tower biofilter:

[0037] The composite tower biofilter is composed of three-stage filters. The first-stage filter is a high-level water distribution anaerobic filter. The filter is equipped with a new type of anaerobic filter material. The anaerobic filter material is a granular filter material of different grades. In the process of sewage treatment, COD, SS and some nitrogen and phosphorus are further intercepted and removed through the use of filter material adsorption and microbial synergy. Intermittent water intake is conducive to the endogenous digestion of microorganisms in the ecological filter, reducing the amount of sludge produced, and the filter at this stage basically does not discharge sludge.

[0...

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Abstract

The invention belongs to the technical field of water treatment and particularly relates to a method and a system for advanced treatment of centralized rural domestic sewage. The treatment system comprises a hydrolytic acidification tank, a composite tower type ecological filter and a surface flow artificial wetland system. The treatment method comprises the following steps of: collecting sewage through a pipe network, allowing the sewage to enter the hydrolytic acidification tank which is a landfill tank, stabilizing and regulating the water quantity, and pumping the sewage into a high-position service reservoir by using a submersible electric pump with the head of more than 5m; distributing the domestic sewage of the hydrolytic acidification tank into the composite tower type ecological filter by strengthening water distribution measures, and removing organic pollutants, total nitrogen, ammonia nitrogen, total phosphorus and pathogenic microorganisms in the sewage; and allowing tail water and collected rainfall runoff to enter the artificial wetland system for advanced treatment. A good water environment landscape can be built for an artificial wetland; and the effluent reaches the first-grade A standard of discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002).

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method and system for advanced treatment of centralized rural domestic sewage. Background technique [0002] The main components of rural domestic sewage are organic metabolic waste, some animal and plant food residues, physiological excreta (feces, urine) and other substances, and also contain a large number of non-pathogenic microorganisms and a small amount of pathogenic microorganisms that can cause human infectious diseases . According to the data of the Ministry of Environmental Protection in 2010, the country produces more than 9 billion tons of domestic sewage annually in rural areas, accounting for about 1 / 3 of the total domestic sewage discharge in the country. In the report of the Ministry of Construction (2009) "Current Situation and Problems of Village Human Settlement Environment", in the survey of 74 villages in 43 counties of 9 representativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 郑正李纪华杨晓英王正芳杨文丽罗兴章聂耳杨沫史沫
Owner FUDAN UNIV
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