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Construction standard of rural sewage reconstruction project
1, rural sewage source
Sewage produced can be roughly divided into three types:
First, the kitchen sewage is mostly composed of dish washing water, pot washing water, rice washing water and vegetable washing water. This kind of sewage contains organic matter such as rice bran and vegetable leftovers, as well as a large number of animal and vegetable fats and various elements such as sodium, acetic acid, chlorine and iodine. With the improvement of villagers' quality of life, the oil content in the discharged sewage has greatly increased, which is not conducive to purification.
Second, domestic washing sewage, the extensive use of washing products is one of the important manifestations of improving the quality of life in rural areas, and the chemical component phosphorus in washing products sold in the market is being widely used, which brings more serious phosphorus load problems.
Third, flush the toilet water. In some rural areas, backward straight-row wooden toilets are transformed into flush toilets, resulting in a large amount of domestic sewage.
2, rural sewage treatment standards
Discharge standard of pollutants for urban sewage treatment plants (GB 189 18-2002)
GB8978 Comprehensive Wastewater Discharge Standard
GB 189 18 Pollutant Discharge Standard for Urban Sewage Treatment Plants
GB5084 Water Quality Standard for Farmland Irrigation
GB7959 Hygienic standard for harmless feces
GB 16554 National Emission Standard for Odor Pollutants
CJJ 124-2008 Technical Specification for Town (Village) Drainage Engineering
CJJ 123-2008 Technical Specification for Town (Village) Water Supply Project
HJ574-20 10 technical specification for pollution control in rural areas.
HJ/T9 1 Technical Specification for Surface Water and Sewage Monitoring
And the local rural sewage treatment standards formulated by some local governments.
3. The significance of rural sewage treatment
Today, with the development of rural urbanization, rapid development will inevitably bring various environmental problems, among which rural domestic sewage pollution is the main problem in rural areas. It is of great strategic significance to strengthen the protection of rural water environment and improve rural domestic sewage treatment facilities for building a new socialist countryside and protecting the safety of water environment. It is of great significance to strengthen the implementation of rural sewage treatment standards in rural areas.
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