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Novel process for treating coking waste water by charging activated sludge process

A technology of activated sludge method and coking wastewater, applied in water/sludge/sewage treatment, illuminated water/sewage treatment, oxidized water/sewage treatment, etc. Stability and other issues, to achieve the effect of reducing operating costs, saving investment costs, and excellent ammonia nitrogen removal

Inactive Publication Date: 2009-04-29
江苏百纳环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After anoxic and aerobic reactions, the ammonia nitrogen and COD of the final effluent are generally very unstable, the compliance rate is relatively low, and the system occupies a huge area

Method used

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  • Novel process for treating coking waste water by charging activated sludge process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] As shown in the figure, the present invention includes three stages of pretreatment, biochemical treatment and post-treatment.

[0024] Preprocessing:

[0025] The coking wastewater is passed into the regulating tank at a flow rate of 20t / h, wherein the ammonia nitrogen concentration in the coking wastewater is less than 250mg / L, and it is preliminarily precipitated in the regulating tank to remove the solid particle impurities in the coking wastewater. If the ammonia distillation system fails before entering the adjustment pool, and the ammonia nitrogen concentration reaches above 250mg / L, that is, when the ammonia nitrogen and other pollution in the coking wastewater suddenly rises, the coking wastewater should be transferred to the accident pool first, and the pump will lift a small amount when the system is normal. Enter the conditioning pool.

[0026] The raw liquid of coking wastewater from the adjustment tank enters the flocculation sedimentation tank, and magne...

Embodiment 2

[0034] As shown in the figure, the present invention includes three stages of pretreatment, biochemical treatment and post-treatment.

[0035] Preprocessing:

[0036] The coking wastewater is passed into the regulating tank at a flow rate of 30t / h, wherein the concentration of ammonia nitrogen in the coking wastewater is less than 250mg / l, and it is preliminarily precipitated in the regulating tank to remove solid particle impurities in the coking wastewater. If the ammonia distillation system fails before entering the adjustment pool, and the ammonia nitrogen concentration reaches above 250mg / l, that is, when the ammonia nitrogen and other pollution in the coking wastewater suddenly rises, the coking wastewater is first transferred to the accident pool, and the pump lifts a small amount when the system is normal. Enter the conditioning pool. The raw liquid of coking wastewater from the adjustment tank enters the flocculation sedimentation tank, and magnesium salt-phosphate i...

Embodiment 3

[0045] As shown in the figure, the present invention includes three stages of pretreatment, biochemical treatment and post-treatment.

[0046] Preprocessing:

[0047] The coking wastewater enters the regulating tank at a flow rate of 35t / h, where the ammonia nitrogen concentration in the coking wastewater is less than 250mg / l, and the solid particles in the water are initially precipitated to remove impurities. If the ammonia distillation system breaks down before entering the adjustment pool, and the ammonia nitrogen reaches more than 250mg / l, that is, the ammonia nitrogen and other pollution in the coking wastewater suddenly rises, the coking wastewater is first transferred to the accident pool, and when the system is normal, the pump lifts a small amount and enters the adjustment tank. pool.

[0048] The raw liquid of coking wastewater from the adjustment tank enters the flocculation sedimentation tank, and magnesium salt-phosphate is added to the water distribution area o...

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Abstract

The utility model discloses a technology for treating coking wastewater by using a novel feeding activated sludge method, which comprises the following steps: biochemical treatment process is carried out on the pretreated wastewater, the coking wastewater first enters an A-grade biochemical pond to provide carbon sources for denitrification, and then the coking wastewater enters a 0-grade biochemical pond for carrying out oxidation and nitration under aerobic environment, the effluent water of the 0-grade biochemical pond enters a secondary sedimentation tank; the supernatant from the secondary sedimentation tank enters a subsequent-stage treatment system and one part of settling sludge refluxes and enters the A-grade biochemical pond and 0-grade biochemical pond; the other part of the settling sludge enters a sludge thickener. As flocculants are added into the biochemical pond, the ability of tolerating loads is greatly improved, and shock resistance is also greatly enhanced; the area of the biochemical reaction pond is reduced to 70 percent of the area of the reaction pond of traditional feeding activated sludge method, so investment costs are saved and operation costs are decreased; while the decolorizing ratio of the technology to coking wastewater, black liquor and chloromycetin wastewater can reach to more than 80 percent.

Description

technical field [0001] The invention relates to a novel feeding activated sludge method for treating coking wastewater, which belongs to the technical field of environmental protection and wastewater treatment. Background technique [0002] Coking wastewater is a kind of wastewater that is difficult to treat. It contains many toxic and harmful substances such as phenols, cyanides, ammonia nitrogen and benzene series, accounting for about 60% of the content of coking wastewater. At present, there are many treatment methods for coking wastewater, but it is difficult to reach the standard for harmful substances such as COD and ammonia nitrogen after treatment, especially the high concentration of ammonia nitrogen. Ammonia nitrogen is the most harmful pollution factor in water bodies. It will lead to eutrophication of rivers and lakes and weaken the self-purification ability of water bodies. Ammonia nitrogen in polluted water usually refers to nitrogen existing in the form of a...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/52C02F1/78C02F1/32
Inventor 洪树虎洪树平吴建强鲁舜峰王盘云王培
Owner 江苏百纳环境工程有限公司
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