Comprehensive treatment method for liquid dung of livestock and poultry and domestic wastewater in country

Abstract

The invention relates to a comprehensive treatment method for liquid dung of livestock and poultry and domestic wastewater in a country, and is used for solving the problems of random discharge of comprehensive wastewater by peasant household and shortage of matching treatment facilities. The comprehensive treatment method comprises steps of mixing the domestic wastewater of peasant household with excrement sewage of livestock and poultry according to weight ratio of 1:1, then pre-treating sequentially by a coarse screen, a water collecting tank and a fine screen, and treating by an anaerobic biofilter, a two-stage biological aerated filter and a constructed wetland, wherein macromolecular organic matters are degraded into micromolecular organic matters through the anaerobic biofilter, so that the biochemical degradability of the wastewater is improved; the effluent passing through the two-stage biological aerated filter flows back to the anaerobic biofilter for nitrogen removal by denitrification; two-stage aeration is mainly used for removing most organic matters, and most ammonia nitrogen is converted into nitrate nitrogen through the action of nitrobacterium; the constructed wetland is mainly used for further purification treatment on the wastewater, so that the effluent reaches the standard and is discharged.

Description

technical field [0001] The invention relates to a treatment method for comprehensive rural wastewater, that is, livestock and poultry wastewater and human domestic sewage, and belongs to the field of wastewater treatment technology and rational utilization. Background technique [0002] With the rapid development of the rural economy, the discharge of comprehensive rural wastewater has gradually increased, which has deteriorating the environmental conditions in rural areas, and the environmental quality has declined significantly, directly threatening the living environment and health of the broad masses of farmers, and restricting the healthy development of the rural economy. . [0003] Rural households often raise 2 to 5 pigs. Compared with humans, livestock and poultry produce more wastewater. The amount of sewage produced by a pig is 7 times that produced by a person. At the same time, due to the small scale and wide scope of the aquaculture industry, it is difficult to...

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Problems solved by technology

[0005] In order to overcome the problems of low comprehensive wastewater treatment rate in rural areas and easy pollution to the environment, the present invention proposes an anaerobic biological filter-primary biological aerated filter-secondary biological aerated filter-ecological wetland treatment process for Treatment of comprehensive wastewater generated by rural farmers

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