Sewage treatment system for small towns

Abstract

The invention discloses a sewage treatment system for small towns and belongs to the sewage treatment field. The system comprises a pretreatment unit, a secondary biological treatment unit and an advanced treatment unit orderly connected; wherein the pretreatment unit is provided with a source water inlet; the secondary biological treatment unit adopts the interior circular energy saving MBR system; the advanced treatment unit adopts the joint disinfection device of ultraviolet ray and the chlorine dioxide, the advanced treatment unit is provided with a good water outlet. The membrane bioreactor type is adopted by the system while the secondary biological treatment unit adopts the interior circular energy saving MBR system, so that the biomass of the activated sludge is effectively raised, the floor space and the capital cost are greatly reduced; the floor space is small, the removal efficiency is good, the management is easy, the energy consumption is low, the sewage treatment system is very suitable for the small towns, and especially for the regions and the environment sensitive areas with high water quality requirement and small floor space.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a small town sewage treatment system. Background technique [0002] With the continuous improvement of my country's urbanization level and the rapid accumulation of urban population, the amount of urban sewage generated is increasing day by day. However, the construction of sewage treatment facilities in small towns is seriously lagging behind the requirements of urban economic and social development, the wanton discharge of sewage is common, and the problem of water environmental pollution is prominent, which has adversely affected the life, production environment and health of local residents. [0003] Traditional small town sewage treatment processes generally have problems such as unreasonable process selection, poor operation stability, and checking of nitrogen and phosphorus removal effects. They cannot meet the treatment requirements for high water quality and environmentally sens...

AI Technical Summary

Problems solved by technology

However, the construction of sewage treatment facilities in small towns seriously lags behind the requirements of urban economic and social development, the phenomenon of wanton sewage discharge is common, and the problem of water environmental pollution is prominent, which has caused adverse effects on the life, production environment and physical health of local residents.

[0003] The traditional small town sewage treatment process generally has problems such as unreasonable process selection, poor operation stability, and poor nitrogen and phosphorus removal effect. It cannot meet the treatment requirements for high water quality requirements and environmentally sensitive areas.

Membrane bioreactor has the advantages of high sludge concentration, small footprint, high degree of self-control, good removal effect, and strong impact load resistance. However, this technology is rarely used in the field of sewage treatment in small towns, mainly because its operating cost High, mainly manifested in the energy consumption of a large amount of membrane scrubbing, the energy consumption of the mixed liquid return pump, etc.

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