A multi-media ecological treatment system and method for rural domestic sewage in cold and dry areas

Abstract

The invention discloses a system and a method for multi-media ecological treatment of rural domestic sewage in cold and arid regions. The system comprises a sewage regulating and deoiling unit (1), a multi-media soil layer system low temperature-resistant strengthening treatment unit (2), a subsurface-surface flow wetland gradient treatment unit (3), a water resource regulation and storage unit (4), a ferment recycling unit (5) and a wind-solar complementary micro-power and heat supply unit (6); the sewage regulating and deoiling unit is sequentially connected with the multi-media soil layer system low temperature-resistant strengthening treatment unit, the subsurface-surface flow wetland gradient treatment unit and the water resource regulation and storage unit; the wind-solar complementary micro-power and heat supply unit is respectively connected with the sewage regulating and deoiling unit and the multi-media soil layer system low temperature-resistant strengthening treatment unit; and the ferment recycling unit is respectively connected with the sewage regulating and deoiling unit, the multi-media soil layer system low temperature-resistant strengthening treatment unit and the subsurface-surface flow wetland gradient treatment unit.

Description

technical field [0001] The invention belongs to the technical field of recycling domestic sewage in rural areas, and in particular relates to a multi-media ecological treatment system and method for rural domestic sewage in cold and dry areas. Background technique [0002] In recent years, with the continuous improvement of my country's economic development and people's living standards, the problem of rural water environment pollution has gradually become an important factor restricting the construction of new urbanization. In the development of domestic sewage treatment in rural areas, the promotion of centralized sewage treatment technology is also hindered by the high cost of pipe network construction and operation caused by the scattered population in some remote areas; Most of the land is located in ecologically fragile areas. During the peak period of tourism development in the form of farmhouses, a large amount of oily wastewater is produced, which increases the diff...

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Problems solved by technology

However, the microbial activity of the multi-media soil layer sewage treatment system is reduced in the low temperature and anoxic environment in winter, and the treatment efficiency is also reduced accordingly; at the same time, the system is directly applied to oily sewage, which will easily cause system blockage, resulting in serious system paralysis

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