An integrated treatment system and process for rural domestic sewage

Abstract

The invention discloses an integrated treatment system for rural domestic sewage and a process of the system. The integrated treatment system comprises a tank body, and an inlet water adjusting unit, a treating unit and an effluent adjusting unit, which are sequentially communicated with one another in the tank body, wherein the treating unit comprises an anaerobic hydrolysis acidification treating chamber and a stacked ecological filter treating chamber; a zigzag sewage channel is arranged in the anaerobic hydrolysis acidification treating chamber; the inlet of the sewage channel is communicated with the inlet water adjusting unit; a filling material is arranged in the sewage channel; the stacked ecological filter treating chamber comprises an upper ecological filter and a lower ecological filter which are separate from each other; a water distribution pipe communicated with the outlet of the sewage channel is arranged at the top of the upper ecological filter; water collection gas-dispersion pipes with through holes are arranged in the upper ecological filter; the top of the water collection gas-dispersion pipes extend to positions above the upper ecological filter; the bottoms of the water collection gas-dispersion pipes are communicated with the lower ecological filter; the lower ecological filter is communicated with the effluent adjusting unit. According to the integrated treatment system provided by the invention, anaerobic hydrolysis acidification treatment and stacked ecological filter treatment processes are integrated, so that reaeration capacity of a soil seepage system is improved and a favorable condition is created for aerobic / anaerobic reaction.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an integrated treatment system and process for rural domestic sewage. Background technique [0002] In recent years, the treatment of urban domestic sewage has become more and more standardized, and it has been incorporated into centralized urban sewage treatment plants for unified treatment. Generally, urban sewage treatment plants mostly use activated sludge, biofilm, contact oxidation and other processes. Domestic sewage in rural areas generally has the characteristics of small water volume but large fluctuations. If the traditional sewage treatment process of urban sewage treatment plants is adopted, the investment cost is high, the process process is long, and it is easy to cause secondary pollution. [0003] According to the survey data, most of the rural areas in Zhejiang Province are relatively scattered. Some rural residents in mountainous and semi-mountainous a...

AI Technical Summary

Problems solved by technology

However, there have always been problems such as large area, low processing efficiency, and inconvenient operation and management.

[0007] 1. The reoxygenation capacity is limited. Constructed wetlands mainly rely on natural reoxygenation and the oxidation mechanism of wetland plant rhizosphere, and the oxidation capacity is limited. When the pollution load is high, even if the vertical flow-horizontal subsurface flow composite wetland is used, the oxygen content is still difficult to achieve. For the purpose of degrading organic matter and transforming ammonia nitrogen, a large amount of nitrate cannot be produced as a substrate for denitrification, resulting in unsmooth nitrification-denitrification pathways in the composite wetland system

[0008] 2. It is easy to block. When the pollution load of the influent is high, it is easy to cause the accumulation of pollutants in the wetland, resulting in a decrease in the permeability coefficient of the filler and poor circulation of sewage, resulting in the formation of a water layer on the surface of the wetland, which hinders the entry of oxygen in the air and reduces the The activity of aerobic microorganisms

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