Rural domestic sewage treatment process

Abstract

The invention discloses a rural domestic sewage treatment process. In the rural domestic sewage treatment process, a fine grid is used in a pretreatment process to remove large particle pollutants in sewage; an underground anaerobic digester is adopted to carry out hydrolysis acidification treatment so as to provide good conditions for a subsequent aerobic process; a micro power aerobic filter bed organically combines a solar energy micro power technology with an aerobic filter bed technology; a system is supplied with aeration power by solar energy; and a grading packing layer is arranged in the filter bed so as to realize low consumption and high efficiency treatment of the sewage. The rural domestic sewage treatment process particularly comprises the following procedures that after passing through the fine grid, the sewage enters the anaerobic digester; an elastic packing or a flexible packing is arranged in the anaerobic digester; and yielding water flowing out from the anaerobic digester enters the micro power aerobic filter bed system to be treated, wherein CODcr (Chemical Oxygen Demand), NH3-N (index of the ammonia nitrogen content in the sewage) and TP (total phosphorus) of the yielding water can reach the primary standard B of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002). Due to the adoption of the rural domestic sewage treatment process, the treatment efficiency and the treatment degree of the domestic sewage can be improved. The rural domestic sewage treatment process is not limited by areas or air temperature and has small occupied area and low operation cost.

Description

technical field [0001] The invention relates to the field of environmental protection engineering, in particular to a process 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. Able to find more suitable high-efficiency and low-consumption sewage treatment processes and methods according to local conditions. [0003] At present, the rural domestic s...

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Problems solved by technology

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

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