Process and device for treating domestic sewage in high and cold areas

A technology for domestic sewage and alpine regions, applied in aerobic and anaerobic process treatment and other directions, can solve problems such as the inability to achieve sewage treatment in alpine regions, and achieve the effects of avoiding freezing, reducing phosphorus content and improving stability.
CN105060481AInactive Publication Date: 2015-11-18四川蓉加川大环保工程咨询设计有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
四川蓉加川大环保工程咨询设计有限公司
Publication Date
2015-11-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a process for treating domestic sewage in high and cold areas and discloses a device of the process. The process comprises the following steps: (1) sewage continuously flows into an anaerobic zone in an oxidation ditch and sequentially flows through an anoxic zone, an aerobic zone and a settling zone to be discharged, wherein a filler zone of a culture is arranged in the aerobic zone and the flow rate of sewage in the oxidation ditch is less than 0.15 m / s; aeration is carried out on sewage in the anoxic zone, the aerobic zone and the filler zone; and (2) sewage at the tail end of the aerobic zone returns to the anoxic zone; sewage in the settling zone partially returns to the anaerobic zone and the rest of sludge is discharged. The process and device disclosed by the invention are applicable to sewage treatment in high and cold areas and have the advantages of being simple in water treatment process, low in treatment cost, low in energy consumption, small in occupied area, excellent in treatment effect and the like.
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Description

technical field

[0001] The invention relates to a sewage treatment process and device, in particular to a domestic sewage treatment process and device in alpine regions. Background technique

[0002] In sewage treatment, the optimal water temperature is 20-35°C, and the water temperature is below 15°C, which is low temperature. According to investigations, in high-altitude and low-temperature areas (hereinafter referred to as "alpine areas"), the annual average temperature is maintained between 2-14 °C, and the sewage temperature is around 10 °C for 4-6 months throughout the year, which belongs to the low-temperature environment.

[0003] Common sewage treatment processes include CASS process and SBR process, but when these processes are used in alpine regions, there are problems such as high idle rate, difficulty in improving the efficiency of biological nitrogen and phosphorus removal, and easy freezing of the pool surface during the sedimentation and drainage stages; and ...

Claims

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