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Urban domestic sewage treatment method

A technology of urban domestic sewage and treatment methods, applied in the field of urban domestic sewage treatment, can solve the problems of high energy consumption, unstable operation, low efficiency, etc., and achieve the effect of strengthening denitrification ability and good hydrolysis and acidification

Active Publication Date: 2017-10-24
DONGGUAN DONGRI WATER TREATMENT TECH
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  • Summary
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AI Technical Summary

Problems solved by technology

At present, the denitrification and phosphorus removal of sewage treatment plants in my country generally have the disadvantages of high energy consumption, low efficiency and unstable operation.

Method used

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Embodiment Construction

[0037] A kind of urban domestic sewage treatment method of the present invention comprises the following steps:

[0038] 1) Filtration: Sewage enters the grid well through the sewage pipe, and the grid in the grid well filters to remove large solid debris and part of solid suspended matter in the sewage, and the sewage passes through the grit chamber to remove sand particles. After cleaning, the first stage Sewage enters the first regulating tank;

[0039] 2) One-time pH adjustment: Add sodium hydroxide or calcium hydroxide to the first adjustment tank to adjust the pH of the first-level sewage to 8-11, so that the heavy metal ions in the first-level sewage react with the alkali to form metal precipitation and precipitate ; At the same time, add flocculant and coagulant to the first regulating tank, so that the colloidal matter and solid suspended matter in the first-level sewage and the metal precipitation generated gather into sediment; the sediment is discharged into the sl...

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Abstract

The present invention discloses an urban domestic sewage treatment method, which comprises: filtering, first pH value adjustment, second pH value adjustment, treatment in an anaerobic tank, treatment in an anaerobic tank, treatment in an aerobic tank, water discharging, and other steps. According to the present invention, the urban domestic sewage treatment method has characteristics of simpleness, practicality, convenient management and good sewage treatment effect, can meet the standard requirements, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of treatment, and in particular relates to a method for treating urban domestic sewage. Background technique [0002] With the continuous development of human society and the continuous expansion of urban scale, the water consumption and drainage of the city are constantly increasing, which intensifies the tension of water use and the pollution of water quality, and the environmental problems have become increasingly prominent. The resulting water crisis has become a social issue. important constraints to economic development. [0003] In recent years, although the efficiency of sewage treatment in my country has been continuously improved, the problem of eutrophication caused by nitrogen and phosphorus pollution is still becoming more and more serious. With the aggravation of water eutrophication. At present, the denitrification and phosphorus removal of sewage treatment plants in my country generally hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/34C02F101/10C02F101/16
CPCC02F1/001C02F1/5236C02F1/66C02F3/121C02F3/1278C02F3/286C02F3/34C02F9/00C02F2001/007C02F2101/105C02F2101/16
Inventor 王俊铎
Owner DONGGUAN DONGRI WATER TREATMENT TECH
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