Treatment method for rural sewage

Abstract

The invention discloses a treatment method for rural sewage and belongs to the technical field of treatment of domestic sewage. The treatment method comprises the following steps: the rural sewage isintroduced into a grille well, impurities are removed, and effluent of a secondary sedimentation tank enters a constructed wetland, wherein the constructed wetland comprises a soil and vinegar residuecompound layer; the effluent of the constructed wetland enters an ecological filter tank; an ecological filter bed comprises a soil layer for earthworms to do activities, a wood residue layer, cobblestones and biological ceramsites from top to bottom in sequence; a water inlet pipeline is arranged between the soil layer and the wood residue layer; household garbage and sludge are transferred andtreated by the earthworms to obtain fertilizer suitable for crops to grow; effluent of a draining pipeline of the ecological filter tank is used for irrigating the crops. The sewage treatment method disclosed by the invention treats the rural sewage by combining an activated sludge method, a constructed wetland method and an earthworm ecological filter tank method; wastes in the sewage treatment are prepared into biofertilizer by the earthworms; purified water is used for irrigating so as to save water and fertilizer and change the wastes into valuables.

Description

technical field [0001] The invention relates to the technical field of domestic sewage treatment, in particular to a treatment method for rural sewage. Background technique [0002] Rural life is becoming more and more urbanized. Domestic sewage mainly comes from toilet flushing water, kitchen washing water, washing machine drainage, shower drainage and other drainage. Due to scattered areas, large population, and difficult collection of rural sewage, rural sewage becomes water. The main components of pollution, there are a large amount of organic matter and inorganic salts such as nitrogen and phosphorus in rural sewage, which are prone to produce odorous substances under the action of anaerobic bacteria. The development of my country's sewage treatment industry is relatively late. With the rapid development of the national economy , People's living standards have improved significantly, and the demand for sewage treatment has increased. In my country, the water pollution cau...

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Problems solved by technology

[0003] At present, the rural sewage treatment methods mainly include high-efficiency algae ponds, oxidation ponds, contact oxidation methods, etc. High-efficiency algae ponds have shorter residence time than traditional stable ponds, occupy a small area, are easy to construct, easy to maintain, less infrastructure investment, and low operating costs; The removal efficiency of ammonia nitrogen and pathogens is high, but it is easily affected by environmental factors such as temperature and ph; the removal efficiency of oxidation ponds is low, and it is easy to cause ecological damage to black and odorous water bodies. The effect of contact oxidation treatment is better, but the sewage treatment infrastructure costs and sewage treatment The operating cost is relatively high, so it is necessary to find a method suitable for rural sewage treatment, so that the effect of rural sewage treatment is stable, the operating cost is relatively low, and the comprehensive utilization of rural sewage can be maximized through reasonable sewage treatment methods

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