Sewage treatment method

Abstract

The invention relates to a sewage treatment method. The method is as below: sending domestic sewage into an oil separator through a machinery grating, and then sending the sewage into a hydrolysis-acidification pool to decompose macro-molecular organic matters in the sewage into micromolecular organic matters, so as to remove part of COD; sending the sewage into a primary settling tank to concentrating sludge and discharging the sludge into a sludge storage tank; sending an upper clarified liquor into an anoxic biochemical pool; carrying out an denitrification reaction on the sewage and a nitrated liquid flowing back from an aerobic biochemical pool; introducing effluent into the aerobic biochemical pool for aerobic biochemical reaction, and sending the other part of the sewage into a secondary settling tank through an overflow weir; concentrating the sludge, discharging the sludge into the sludge storage tank and flowing the upper clarified liquor into a clear water tank; part of the sludge in the sludge storage tank flows back to the hydrolysis-acidification pool; and conveying clear water to a biological active carbon reactor, flowing outlet water into an ozone contact pool and disinfecting the water outlet for reuse. The method has stable treatment effect, generates a small amount of sludge; residual sludge returns to the nature; and treated sewage is reused in water-scenery and greening, so as to save sewage charge and reduce environmental pollution.

Description

Technical field: [0001] The invention relates to a treatment method for distributed domestic sewage, in particular to a treatment method for domestic sewage in sanatoriums, large hotels, leisure resorts, villas in scenic spots, expressway service areas, and the like. Background technique [0002] my country's "Water Pollution Prevention Law" stipulates that the sewage discharged from residential areas, tourist attractions, resorts, sanatoriums, airports, railway stations, economic development zones and other scattered crowd settlements that cannot be included in the urban sewage collection system and industrial wastewater from independent industrial and mining areas Standardized discharge should be treated locally. Nursing homes, large hotels, large restaurants, leisure tourism resorts, scenic villas, and expressway service areas are all distributed domestic sewage discharge sources. Nursing homes, resorts, and mountain villas are generally located near mountains and rivers,...

AI Technical Summary

Problems solved by technology

Pollution caused by solid waste

Images