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Process for removing nitrogen and phosphor using traditional waste water treatment process

A technology for nitrogen and phosphorus removal and sewage treatment, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low removal rate of nitrogen and phosphorus, and maintain Processing capacity, convenient transformation, good technical and economical effect

Inactive Publication Date: 2006-01-04
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] For the traditional sewage treatment plants that have been built, the removal rate of BOD can reach more than 90%, but the removal rate of nitrogen and phosphorus is very low

Method used

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  • Process for removing nitrogen and phosphor using traditional waste water treatment process

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Comparison scheme
Effect test

Embodiment

[0014] An urban sewage treatment plant adopts the adsorption regeneration process. The removal rate of ammonia nitrogen is 10% to 30%, and the removal rate of TP is less than 20%.

[0015] The technical transformation of the sewage treatment plant adopts this nitrogen and phosphorus removal process, that is, the sewage enters the aeration tank and the secondary sedimentation tank after passing through the grit chamber (the original process technical parameters are still used for the grit chamber, aeration tank and secondary sedimentation tank), and the muddy water After separation, the sewage enters the biological aerated filter, and is discharged after being adsorbed for 45 minutes. 60% of the activated sludge is returned to the aeration tank, and the remaining part of the activated sludge and the remaining sludge are returned to the primary sedimentation tank. Add the mixed salt of aluminum sulfate and ferrous sulfate to the end of the grit chamber, the end of the primary se...

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Abstract

The traditional waste water treating process with added denitriding and dephosphorizing functions includes: throwing chemical dephosphorizing agent in the last section of settling pit, water outlet of the primary settling tank, or the aerobic section and outlet of the aerobic pond, and refluxing 30-60 % of active sludge and partial residual sludge to the primary settling tank to make traditional waste water treating process possess dephosphorizing function; connecting serially aerobic zeolite biofitering pond to the last section of the second settling pond to eliminate ammonia nitrogen with zeolite and chemical and biological synergistic regeneration to maintain the stable adsorption capacity of zeolite. The present invention is suitable for upgrading waste water treating yard, and has low cost.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a process for realizing denitrification and phosphorus removal in the traditional sewage treatment process by utilizing the grit chamber, the primary sedimentation tank and the added zeolite aeration filter in the existing urban sewage treatment plant. 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 carcinogen...

Claims

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Application Information

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