Method and system for decentralized collection and treatment of rural domestic wastewater

Abstract

The invention discloses a method and a system for decentralized collection and treatment of rural domestic wastewater, which belongs to the field of wastewater treatment. The system comprises a decentralized rural domestic wastewater collection system and a decentralized rural domestic wastewater treatment system, wherein different areas are divided for decentralized rural domestic wastewater collection according to rural specific topographical characteristics, and original main canals and branch canals are utilized to collect wastewater into a wastewater pool for storage; the wastewater in the wastewater pool is periodically treated by the decentralized rural domestic wastewater treatment system, and is lifted to a fixed mode or vehicle-mounted mode integrated unit (comprising a primary sedimentation tank, a sand filter, an anaerobic tank, a contact oxidation tank and an inclined tube sedimentation tank) by a lift pump reserved in the wastewater pool, a large quantity of organic matters in the wastewater, such as ammonia nitrogen, total nitrogen and total phosphorus, are removed, effluent water automatically flows into a secondary horizontal subsurface flow artificial wetland system, trace nitrogen and phosphorus elements in the wastewater are further absorbed, and the artificial wetland system increases local beauty and has the characteristic of environment purification. The method has the characteristics of high impact load resistance, high treatment capability, short technological process, small land area occupied by the used systems and good treatment effect.

Description

technical field [0001] The invention relates to a method and system suitable for decentralized collection and treatment of rural domestic sewage, belonging to the field of wastewater treatment. Background technique [0002] With the development of rural areas and the improvement of living standards, the amount of domestic sewage in rural areas continues to increase, and the rural environment is declining. The focus of environmental pollution has gradually shifted from cities to towns and rural areas. Most rural areas are polluted by non-point sources, and sewage is discharged in an unorganized manner. , there is basically no pipe network collection system, no sewage treatment facilities, and the wanton discharge of sewage has brought great health hazards to the lives of local residents and seriously restricted the sustainable development of agriculture and rural economy. [0003] The rural population is widely scattered, relatively unconcentrated, and the population is small...

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Problems solved by technology

[0002] With the development of rural areas and the improvement of living standards, the amount of domestic sewage in rural areas continues to increase, and the rural environment is declining. The focus of environmental pollution has gradually shifted from cities to towns and rural areas. Most rural areas are polluted by non-point sources, and sewage is discharged in an unorganized manner. , there is basically no pipe network collection system, no sewage treatment facilities, and the wanton discharge of sewage has brought great health hazards to the lives of local residents and seriously restricted the sustainable development of agriculture and rural economies.

[0003] The rural population is widely scattered, relatively unconcentrated, and the population is small. Due to the constraints of natural conditions and terrain, sewage is extremely difficult to collect. Most rural domestic sewage is discharged to rivers or farmland along ditches. There is no supporting pipe network for collection, or it is collected through simple The septic tank treatment is directly discharged, which makes it difficult to collect domestic sewage in rural areas and seriously pollutes the surrounding environment.

[0004] Most rural domestic sewage in the country does not have sewage treatment facilities. At present, it is mainly discharged into rivers and farmland in an unorganized manner. The environmental capacity of rural areas is gradually declining. Therefore, according to the characteristics of rural domestic sewage collection, pipeline network construction, high cost, and centralized treatment, There is an urgent need for a method and system for decentralized collection and decentralized treatment of rural domestic sewage

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