Distribution treatment combination technological method for domestic sewage of small-sized towns

Abstract

The invention discloses a distribution treatment combination technological method for domestic sewage of small-sized towns. The distribution treatment combination technological method includes steps: S1, water collection regulation treatment: leading the sewage to enter a water collecting and regulating tank and lifting the sewage by a submersible pump after solid residues in the sewage is removed by a porous grating pipe; S2: integral biological treatment: sequentially carrying out a primary sedimentation process, an anoxia process, a rotary biological treatment process and a secondary sedimentation process; S3, treatment by the aid of an artificial wetland: feeding the sewage to the subsurface artificial wetland; and S4, disinfection. In the primary sedimentation process, parts of suspended matters and inorganic particulate matters are absorbed and settled, and simultaneously, parts of organic matters are removed; a denitrification process is complete din the anoxia process; organicmatters which are not removed are degraded in the rotary biological treatment process; and in the secondary sedimentation process, suspended matters in the sewage are settled, and the sewage is clarified. The combination technological method has the advantages of fine denitrification effect, low excess sludge quantity, high standards of treated yielded water, low energy consumption and running cost and simplicity in management and maintenance, and is suitable for popularization and application in the small-sized towns.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment technology, and in particular relates to a small-scale sewage treatment process suitable for decentralized treatment of domestic sewage in villages and towns and combining integrated biological treatment and artificial wetland. Background technique [0002] Small villages and towns are relatively remote, relatively scattered, economically backward, and rarely have centralized sewage collection facilities. Domestic sewage is often discharged randomly, seriously polluting nearby water bodies and the ecological environment, and the pollution situation is becoming increasingly serious. With the further acceleration of the construction of new rural areas in our country, the treatment of domestic sewage in small villages and towns will receive more and more attention. Distributed processing technology has the characteristics of small one-time investment, low operating cost, good processing effe...

AI Technical Summary

Problems solved by technology

"The main problem of this process is: due to the high nitrogen content in domestic sewage and rich organic matter, the effect of this process on nitrogen removal and reduction of organic matter content is not obvious, and eutrophication often occurs in constructed wetland units. Unstable, unable to meet the sewage treatment needs of key river basin areas with high effluent water quality requirements

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