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Sewage treatment method

A sewage treatment method and sewage technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of improving biochemical treatment effects, reducing volume, and preventing secondary pollution

Inactive Publication Date: 2012-10-10
ZHENGZHOU MENGXI ENVIRONMENTAL PROTECTION TECH
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  • Abstract
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Problems solved by technology

The large consumption of these chemicals not only increases the operating cost of the enterprise, but also the generated sludge is likely to cause secondary pollution to the environment

Method used

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  • Sewage treatment method

Examples

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experiment example 1

[0019] Taking high-concentration brewing wastewater treatment process as an example

[0020] The water quality of brewing wastewater is relatively complex. In addition to high concentrations of biochemical organic pollutants, it also contains relatively high concentrations of nitrogen and phosphorus compounds, especially the presence of calcium magnesium phosphate, which is easy to form stable "struvite" in the pipeline. , so that the pipeline is seriously blocked; the COD of wastewater is generally about 30000mg / L, the pH value is about 5.5, and the water temperature is 30°C. It is wastewater with complex components and high concentration. The treatment process currently used, taking the sewage treatment scale of 2,000 tons of wastewater per day as an example, the hydraulic retention time of the regulating tank is 8h, and 10-20% polyaluminum chloride is added for the air flotation reaction, and the hydraulic retention time of the UASB anaerobic reactor The hydraulic retention...

experiment example 2

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Abstract

The invention relates to a sewage treatment method which comprises the following steps of: carrying out grille treatment on sewage, entering a biological flocculation reaction device, entering an anaerobic and aerobic device after primary sedimentation, entering a secondary sedimentation tank after biochemical reaction and conveying all residual sludge discharged by the secondary sedimentation tank to the biological flocculation reaction device to be acclimatized into a microbial flocculant for use; and conveying sludge discharged from a primary sedimentation tank to a sludge concentration tank and conveying to a sludge dewatering room after concentration for treatment. The sewage treatment method has the beneficial effects that the goal of treatment of wastes with processes of wastes against one another is achieved, and the residual sewage is taken the microbial flocculant, so that the introduction quantity of chemical flocculant pollutants is reduced, the expenditure of the flocculant is saved, and the running cost of sewage treatment can be reduced by about 1 / 3; after wastewater is subjected to biological flocculation reaction, the treatment load concentration of a subsequent sewage treatment facility is reduced by about 40-60 percent, and a dosing room, a flocculant dissolving tank and other equipotent and facilities are not required to be constructed, so that the capital construction investment can be saved; and the concentrations of poisonous and harmful pollutants in the sewage subjected to the biological flocculation reaction are greatly reduced, so that the activities of microorganisms in all subsequent treatment units are improved.

Description

technical field technical field [0001] The invention relates to a sewage treatment method, in particular to a treatment method for high-concentration organic waste water, refractory waste water and toxic waste water, and belongs to the field of sewage treatment. Background technique [0002] When the activated sludge method is used to treat wastewater, a part of the organic matter is absorbed by microorganisms and oxidized and decomposed into simple inorganic matter, and at the same time releases energy, which is used as the energy source for the life activities of the microorganism itself; Synthesize new protoplasm. The continuous proliferation of microorganisms is manifested by the continuous increase of system activated sludge. However, too much sludge will make the effect of biochemical treatment worse. In order to maintain the stable operation of the treatment system, the excess sludge produced must be discharged from the system. [0003] Like the activated slud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张会良李晓玲邵聚红付权峰
Owner ZHENGZHOU MENGXI ENVIRONMENTAL PROTECTION TECH
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