Combined rural sewage treatment process and system

Abstract

The invention relates to a combined rural sewage treatment process and system. The process comprises the following steps: 1) efficient anaerobic treatment of wastewater; 2) multi-filler biological filtration; and 3) artificial wetland purification. In the system, an outlet of a grating well is connected with an inlet of an efficient anaerobic pond through a grit basin; the outlet of the efficient anaerobic pond is communicated with a spraying system on the upper part of a multi-filler biological trickling filter through a pump; the outlet of the multi-filler biological trickling filter is communicated with an artificial wetland through a secondary sedimentation tank; and the artificial wetland discharges standard purified water. By the process, most of the CODcr, BOD5, NH3-N and the like in the wastewater are removed, wherein the removal rate of CODcr can reach 80-85%, the removal rate of BOD5 can reach 90-95%, and the removal rate of NH3-N can reach 70-80%.

Description

technical field [0001] The invention relates to a process and system for treating domestic sewage in small towns, in particular to a compound rural sewage treatment process and system, belonging to the technical field of environmental engineering water treatment. Background technique [0002] With the rapid development of small towns and villages in our country, the continuous expansion of built-up area, the rapid expansion of township enterprises, and the continuous population density have exacerbated the environmental pollution problems of small towns and villages: the sewage discharge of small towns and villages has continued to increase, but Most of them do not have effective treatment facilities, and are often discharged into the surrounding water system randomly. This not only causes the environmental pollution of small towns and villages to become increasingly serious, but also becomes an important source of pollution for the regional water environment, resulting in a ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of small towns and villages in our country, the continuous expansion of built-up area, the rapid expansion of township enterprises, and the continuous population density have exacerbated the environmental pollution problems of small towns and villages: the sewage discharge of small towns and villages has continued to increase, but Most of them do not have effective treatment facilities, and are often discharged into the surrounding water system randomly. This not only causes the environmental pollution of small towns and villages to become increasingly serious, but also becomes an important source of pollution for the regional water environment, resulting in a considerable number of small towns, villages and towns. The water system around the villages and towns has lost the ability to degrade pollution, and even black and odorous water bodies appear to varying degrees

A large amount of untreated wastewater discharge also causes surface and groundwater pollution, so there is an urgent need to research and develop new simple, energy-saving and efficient wastewater treatment technologies

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