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Process for removing nitrogen and phosphor from sewage capable of being built by separate periods

A technology for nitrogen and phosphorus removal and process, applied in the direction of biological water/sewage treatment, adsorption water/sewage treatment, water/sewage multi-stage treatment, etc., to achieve short hydraulic retention time, low construction investment and operation costs, and simple process flow Effect

Inactive Publication Date: 2006-01-04
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

In view of the current shortage of construction and operation funds, first solve the initial treatment problem, solve the current serious organic pollution and phosphorus pollution problems through phased construction with less investment, and continue to build a combination of secondary and tertiary treatment after the economic conditions are basically met. Nitrogen and phosphorus removal process

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  • Process for removing nitrogen and phosphor from sewage capable of being built by separate periods

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Embodiment

[0014] Sewage and chemical dephosphorization agent (polyferric chloride and aluminum sulfate) enter the primary sedimentation tank after being mixed in the grit chamber, and part of the returned sludge also flows back to the primary sedimentation tank and settles in the primary sedimentation tank for about 1.5 hours. The effluent enters the aeration tank and mixes with part of the return sludge. After 5-6 hours of aeration, the mixed solution is discharged into the secondary sedimentation tank. After the separation of mud and water, the effluent from the secondary sedimentation tank enters the aerated zeolite biological filter, and is discharged after being fully absorbed. The adsorption-saturated zeolite biological filter material adopts chemical-biological synergistic regeneration, and the regenerated nitrification liquid is returned to the adsorption regeneration section of the primary sedimentation tank or aeration tank for denitrification and denitrification. When 40% of ...

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Abstract

The sewage denitriding and dephosphorizing process capable of being built in separate periods includes: throwing chemical dephosphorizing agent in settling pit and flocculating deposition in primary settling tank to eliminate organic pollutant and dephosphorize; secondary biological treatment to further eliminate organic pollutant; adsorbing ammonia nitrogen aerobic zeolite biofitering pond after second settling tank, combined chemical and biological regeneration of adsorption saturated zeolite, converting the released ammonia nitrogen into nitrate nitrogen, and refluxing the regenerated liquid with rich nitrate nitrogen to front section of second biological treatment for biological denitrification. The present invention is suitable for treating serous organic pollution and phosphate pollution in low cost.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a combined sewage denitrification and dephosphorization process which can be constructed in stages by using primary enhanced treatment, secondary biological treatment and tertiary physical-biological denitrification treatment. Background technique [0002] Eutrophication is an increasingly serious global water environment problem. In slow-flowing water, nutrients such as nitrogen and phosphorus will cause excessive growth of algae and aquatic plants, and lead to a sharp decrease in dissolved oxygen in the water, causing a large number of fish to die. When the eutrophication of the water body is serious, it will also lead to the degradation of the lake and even the demise of the water body. For water supply sources, algae will not only affect the conventional water purification process, but also the organic matter released by its growth may become carcinogenic trihalomethanes through...

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/12C02F1/28
CPCY02W10/10
Inventor 成官文
Owner GUILIN UNIVERSITY OF TECHNOLOGY