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Method for treating rural domestic sewage

A domestic sewage and treatment method technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. low operating cost, reduced operating cost, and convenient management

Inactive Publication Date: 2012-07-11
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor treatment effect, large floor area and high operation cost in the existing rural domestic sewage, and provide a rural domestic sewage treatment method with high pollution control efficiency, low operation cost and good environmental benefits

Method used

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  • Method for treating rural domestic sewage
  • Method for treating rural domestic sewage

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Embodiment 1

[0018] Rural domestic sewage enters ditches with fine screens. The flow rate of water passing through the ditches is 0.5m / s, and the flow rate of water passing through the fine screens is 0.6m / s. The rural domestic sewage after treatment flows into the advection sedimentation tank. The advection sedimentation tank is divided into two groups, which are operated alternately and in parallel. The load is 0.35m3 / m2 h, and the sludge produced by the horizontal flow sedimentation tank is cleaned once a month, and the cleaned sludge is used as organic fertilizer; after the suspended solids contained in the sewage are removed by the horizontal flow sedimentation tank, the rural domestic sewage Enter the micro-dynamic aerobic filter bed, the bottom of the water inlet end of the micro-dynamic aerobic filter bed is equipped with uniform water distribution pipes, the water flow direction is vertical flow, and the bottom of the micro-dynamic aerobic filter bed is horizontally equipped with a...

Embodiment 2

[0020] Rural domestic sewage enters ditches with fine screens. The flow velocity of water passing through ditches is 0.7m / s, and the flow rate of water passing through fine screens is 0.8m / s. Manually clean the grid slag, and pre-treat with fine screens to remove coarse impurities. The rural domestic sewage after treatment flows into the advection sedimentation tank. The advection sedimentation tank is divided into two groups, which are operated alternately and in parallel. The load is 0.60m3 / m2 h, and the sludge produced by the advection sedimentation tank is cleaned once every two months. The cleaned sludge is used as organic fertilizer; Enter the micro-dynamic aerobic filter bed, the bottom of the water inlet end of the micro-dynamic aerobic filter bed is equipped with uniform water distribution pipes, the water flow direction is vertical flow, and the bottom of the micro-dynamic aerobic filter bed is horizontally equipped with an air distribution device, the air distributio...

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Abstract

The invention discloses a method for treating rural domestic sewage. By the method, a fine grid is used in a pretreatment process to remove large impurities in the sewage, and a horizontal flow sedimentation tank is used for removing suspended matters in the sewage for pretreatment, so that a good process condition is provided for a subsequent aerobic filter bed process; and a micro-power aerobic filter bed is formed by organically combining solar micro-power equipment with an aerobic filter bed, the aeration power of a system is provided by solar energy, and a gradation packing layer is arranged in the filter bed, so that the sewage can be efficiently treated at low power consumption. The method comprises the following steps of: allowing the sewage which flows through the fine grid to flow into the horizontal flow sedimentation tank; and allowing water which flows out of the horizontal flow sedimentation tank to flow into a micro-power aerobic filter bed system for treatment, wherein chemical oxygen demand (COD)Cr, NH3-N and TP of outflow water can reach a first-class B level of Pollutant Discharge Standard of Municipal Wastewater Treatment Plant (GB18918-2002). By the method, the treatment efficiency and the treatment degree of domestic sewage can be improved; and the method makes a small floor space occupied and is low in operation cost.

Description

technical field [0001] The invention relates to the field of environmental protection engineering, in particular to a method for treating domestic sewage in rural areas. Background technique [0002] The indiscriminate discharge of rural domestic sewage without treatment can cause serious pollution of surface water runoff, and can also pollute water source water quality, increase water supply risks and treatment costs in cities, and cause difficulties in rural domestic water use. But at the same time, due to the limitation of natural conditions, rural domestic sewage is scattered and difficult to collect, and it is difficult to lay a large-scale sewage collection pipe network, so that rural domestic sewage cannot be included in large-scale centralized sewage treatment plants for centralized treatment. Be able to find a more suitable rural domestic sewage treatment method according to local conditions. [0003] At present, the rural domestic sewage treatment process mostly a...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52
CPCY02W10/37
Inventor 胡智锋韦彦斐顾震宇
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE