Treatment system for rural domestic sewage

Abstract

The invention discloses a treatment system for rural domestic sewage. The treatment system comprises a pretreatment system, an anaerobic biofilter and an artificial wetland system which are sequentially communicated through pipelines and is characterized in that the pretreatment system comprises a grating sand settling tank and an oil separator; the artificial wetland system comprises a pluralityof wetland units; the rural domestic sewage is concentrated into the grating sand settling tank so as to remove large-particle sundries and settled sand and then fed into the oil separator to performoil-water separation, the separated sewage is fed into the anaerobic biofilter to perform anaerobic treatment, and then the rural domestic sewage is fed into the artificial wetland system to perform percolation and discharged from the water outlet of the artificial wetland system to complete rural domestic sewage treatment. The treatment system which combines the artificial wetland, the biologicaltreatment technology and the multilayer percolation technology to effectively remove suspended matter, total phosphorus, total nitrogen and ammonia nitrogen in the sewage is low in energy consumption, low in space occupation, low in operation cost, convenient in management and maintenance and promising in application prospect.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a rural domestic sewage treatment system. Background technique [0002] my country's rural areas produce more than 8 billion tons of domestic sewage every year, while 96% of the villages have no drainage channels and sewage treatment systems, and domestic sewage is discharged at will. Domestic sewage in rural areas of our country has the following characteristics: (1) wide and scattered. Scattered geographical distribution of villages makes sewage scattered and difficult to collect. (2) There are many sources. In addition to sewage from human feces and kitchens, there is also sewage from household cleaning and infiltration of domestic waste. (3) Fast growth. With the improvement of farmers' living standards and changes in rural lifestyles, the generation of domestic sewage has also increased. (4) The processing rate is low. [0003] The wanton discharge of untreated...

AI Technical Summary

Problems solved by technology

Scattered geographical distribution of villages makes sewage scattered and difficult to collect

(2) Many sources

(4) Low processing rate

On the one hand, untreated domestic sewage flows into surface water bodies such as low-lying rivers, lakes and ponds, seriously polluting various water sources; on the other hand, domestic sewage is also the source of disease transmission, which is likely to cause infectious diseases, Occurrence and prevalence of endemic and zoonotic diseases

At present, the penetration rate of tap water in rural areas across the country is only about 34%, and more than 300 million farmers still have drinking water safety problems

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