Domestic sewage biological treatment method

Abstract

The invention discloses a domestic sewage biological treatment method, belongs to the technical field of sewage treatment, and solves the problems of environmental pollution, incapability of recyclingand the like in the prior art. The method comprises the steps of pretreatment, water volume adjustment, denitrification treatment, biochemical treatment, precipitation treatment, disinfection treatment and the like. The method has the advantages that the removal efficiency of pollutants is high, the nitrification capability is strong, nitrification and denitrification can be performed simultaneously, the denitrification effect is good, the effluent quality is stable, the residual sludge yield is low, the equipment is compact, the operation is simple, and the like. The quality and the volume load of the treated effluent are greatly improved, the effluent can reach the standard of miscellaneous water, and the treated effluent can reach the standard of landscape water after subsequent treatment. The method can be widely applied to biological treatment and recycling of domestic sewage and various biochemical industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a biological treatment method for domestic sewage. Background technique [0002] In the treatment of kitchen sewage, toilet sewage, and other daily sewage, because the concentration of the above-mentioned several domestic organic substances is relatively low, the biodegradability is good. In order to protect the environment, the part of the domestic sewage that cannot be discharged into the sewage treatment plant must be treated at the first level, and only after it meets the national or local discharge standards can it be allowed to enter the corresponding water body or be reused. [0003] In traditional biochemical processes, secondary sedimentation tanks and tertiary treatment processes are mostly used for domestic sewage, and finally the pretreated sewage is discharged to the corresponding sewage treatment plant. This treatment method pollutes the environment and can...

AI Technical Summary

Problems solved by technology

[0003] In traditional biochemical processes, secondary sedimentation tanks and tertiary treatment processes are mostly used for domestic sewage, and finally the pretreated sewage is discharged to the corresponding sewage treatment plant. This treatment method pollutes the environment and cannot be recycled, and It takes a long time to process the job and the processing effect is not good

Images