Method and system for ecological management of rural domestic sewage

Abstract

The invention relates to a method for ecological management of rural domestic sewage. The method includes that the domestic sewage of each household is collected to low-lying places of a residential area by the aid of a pipe network according to local conditions, a rural domestic sewage treatment system composing of a first-level grille tank, a third to sixth-level front adjustment and biological matrix purification tanks, a seventh to sixteenth-level myriophyllum elatinoides ecological wetlands and first to second-level terminal intensive treatment tanks is established. The pollutant content of COD (chemical oxygen demand), ammonia nitrogen and total phosphorus in discharged water in the terminal wetlands is controlled under the first-level control index value according to 'standards for urban living sewage discharge in the People's Republic of China' (GB18918-2002) issued and implemented by the state environmental protection administration in 2002; in addition, myriophyllum elatinoides harvested in the ecological wetlands is made into fodder to feed chickens, ducks, gooses, pigs, cows, sheep, fish and the like, and certain economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of environmental technology, and particularly relates to a method and system for ecological treatment of rural domestic sewage, which is especially suitable for subtropical rural natural villages, water catchment areas or small watersheds, and uses idle land (wasteland) at the corners of villages to treat daily sewage, realizing Improve the water quality of small ponds and streams in rural areas. Background technique [0002] With the improvement of rural farmers' living standards and living environment, the popularization and application of rural toilets, shower rooms, washing machines and other living facilities, the random discharge of rural domestic sewage has caused COD, ammonia nitrogen, total nitrogen, Total phosphorus pollutants exceed the standard seriously, leading to increasingly prominent rural water environment problems. Village and town domestic sewage, scattered breeding wastewater and agricultural pro...

AI Technical Summary

Problems solved by technology

(3) The traditional in-situ sewage treatment system (septic tank) is less effective in removing nitrogen, phosphorus compounds and pathogenic organisms, and is only used as a pretreatment device to prepare for further treatment

It can be seen that the construction of rapid infiltration and oxidation pond technology based on natural systems has lower operating costs, followed by contact oxidation and aerated biofilters based on biofilm methods, while SBR, oxidation ditch and traditional systems based on artificial systems The construction cost of the activated sludge method is relatively high, and it needs to consume a certain amount of electric energy and chemicals such as flocculants. Special personnel must be arranged for management and maintenance, and the operating cost is also relatively high.

From the analysis of treatment effect, impact resistance performance, operation management, energy saving, floor space, etc., it can be seen that the above-mentioned technologies have certain technical problems, and the economic investment burden of engineering and operation still exceeds the user's ability to bear

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