Environment-friendly septic tank

Abstract

The invention belongs to an environment-friendly septic tank, which is mainly composed of a septic tank body, solar power generation equipment, an aeration pump, a sterilizer and a sludge settling barrel and is formed by improving an existing three-grid septic tank. According to the invention, after toilet excrement is treated by the environment-friendly septic tank, the quality of the dischargedwater reaches the first-grade A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002); and the environment-friendly septic tank is simple in structure,low in price and convenient to install, belongs to miniature excrement water purification standard treatment equipment, and has advanced popularization significance for implementing excrement purification standard treatment of rural toilet revolution in China and treating sewage from rural sources.

Description

technical field [0001] The invention relates to an environment-friendly septic tank for rural toilets, belonging to the field of environment-friendly equipment; Background technique [0002] With the implementation of China's rural toilet revolution and rural revitalization plan, it is required to purify and meet the standard treatment of toilet excrement produced by the "source" in rural areas; at present, China mainly implements three-format septic tanks to treat the excrement of farmer household toilets, that is, toilet excrement The water is first discharged from the water inlet into the first tank of the three-compartment septic tank. In the first tank, solids with large specific gravity and parasite eggs and other objects settle down, and the anaerobic bacteria in the water start preliminary fermentation and decomposition. , the initially decomposed dung liquid flows into the second grid tank, while the dung skin floating above and the dung residue deposited below rema...

AI Technical Summary

Problems solved by technology

[0002] With the implementation of China's rural toilet revolution and rural revitalization plan, it is required to purify and meet the standard treatment of toilet excrement produced by the "source" in rural areas; at present, China mainly implements three-format septic tanks to treat the excrement of farmer household toilets, that is, toilet excrement The water is first discharged from the water inlet into the first tank of the three-compartment septic tank. In the first tank, solids with large specific gravity and parasite eggs and other objects settle down, and the anaerobic bacteria in the water start preliminary fermentation and decomposition. , the initially decomposed dung liquid flows into the second grid tank, while the dung skin floating above and the dung residue deposited below remain in the first grid tank to continue fermentation. In the second grid tank, the dung liquid continues to ferment Decompose, the eggs continue to sink, the pathogens gradually die, and the feces are further harmless. The thickness of the dung skin and dregs produced is significantly smaller than that in the first grid pool, and the dung skin and dregs that flow into the third grid pool The feces are generally decomposed, and the germs and parasite eggs have been basically killed; the function of the third compartment is mainly to temporarily store the settled and basically harmless feces; however, although the water discharged from the traditional three-format septic tank The insect eggs and disease-fighting bacteria are killed, but the corpses of the eggs are still in the water, and there are still a large amount of undecomposed organic matter in the water. The water quality discharged from the toilet reform does not meet the relevant national standards. Once in the air, it will slowly become smelly again, breeding mosquitoes, and seriously polluting the ecological environment near the septic tank;

[0003] It has been reported that conventional septic tanks are transformed into environment-friendly septic tanks. In the publication number CN109336349A "A New Type of Septic Tanks", the biological filler filtration and anaerobic According to the method for treating feces, the filter filler is easily blocked by solid feces, and it is difficult to maintain the anaerobic discharge of feces after the anaerobic process in the septic tank; the applicant published in CN201910116462. In "A Modified Septic Tank for Up-to-Standard Treatment of Water or / and Domestic Wastewater Purification" and CN201910116461.8 "A Modified Septic Tank for Up-to-Standard Treatment of Rural Toilet Stool and Domestic Wastewater", double-urn septic tanks or other Multi-cell septic tanks filter toilet waste water and perform preliminary anaerobic pretreatment, and then introduce the pretreated waste water into three-format or multi-format septic tanks equipped with "anaerobic-facultative-aerobic" Standard treatment in the later stage; the above-mentioned technical equipment has long process flow, large equipment investment, complicated operation, and large area occupied by the equipment. The economic burden of electricity consumption has affected the enthusiasm of farmers to improve toilets;

[0004] At present, my country's rural household toilet reform mainly adopts three-format glass fiber reinforced plastic septic tanks or three-format plastic septic tanks with a volume of 1 cubic meter, 1.5 cubic meters or 2 cubic meters. The volume of the septic tank is selected according to the number of families. The septic tank has the advantages of low price, convenient construction, and small footprint; since 2015, the three-format septic tank has been widely promoted and used nationwide, but there is a defect that the discharged water quality is not up to standard;

Images