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High concentration organic nitrogen waste water processing technology

A high-concentration organic nitrogen technology, applied in the field of high-concentration organic nitrogen wastewater treatment process, can solve the problems of poor stability, low treatment efficiency, and high cost, and achieve the effects of reducing impact, increasing denitrification rate, and reducing organic load

Pending Publication Date: 2019-01-11
苏州德嘉环保工程有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-concentration organic nitrogen wastewater treatment process to realize its high-efficiency and low-consumption treatment in view of the shortcomings of the current high-concentration organic nitrogen wastewater treatment process in the printing and dyeing and spandex industries, such as low treatment efficiency, poor stability and high cost.

Method used

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  • High concentration organic nitrogen waste water processing technology
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Examples

Experimental program
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Effect test

Embodiment 1

[0036]Pass the spandex production wastewater (COD is 3000mg / L, NH3-N is 60mg / L, TN is 250mg / L) into the anaerobic tank, the pH is 8, and the residence time is 30h. Through anaerobic biological treatment, COD is degraded at the same time The organic nitrogen is converted into ammonia nitrogen, the COD of the anaerobic effluent is reduced to about 200mg / L, and 97% of the effluent TN is ammonia nitrogen; the effluent from the anaerobic pool enters the anoxic pool and the aerobic pool for synergistic nitrification and denitrification , the total residence time of the anoxic pool and the aerobic pool is 25h, the dissolved oxygen concentration in the aerobic pool is 4mg / L, and then the supernatant of the nitrification reaction in the aerobic pool is returned to the anoxic pool, which can be used for denitrification The carbon source can reduce the COD load of the subsequent nitrification reaction, and can also use the nitrate nitrogen produced by the nitrification reaction; the DO in...

Embodiment 2

[0038] Pass the spandex production wastewater (COD is 5000mg / L, NH3-N is 35mg / L, TN is 500mg / L) into the anaerobic tank, the pH is 6, and the residence time is 20h. Through anaerobic biological treatment, while degrading COD The organic nitrogen is converted into ammonia nitrogen, the COD of the anaerobic effluent is reduced to about 300mg / L, and 95% of the effluent TN is ammonia nitrogen; the effluent from the anaerobic pool enters the anoxic pool and the aerobic pool for synergistic nitrification and denitrification , the total residence time of the anoxic pool and the aerobic pool is 30h, the dissolved oxygen concentration in the aerobic pool is 5mg / L, and then the supernatant of the nitrification reaction in the aerobic pool is returned to the anoxic pool, which can be used for denitrification The carbon source can reduce the COD load of the subsequent nitrification reaction, and can also use the nitrate nitrogen produced by the nitrification reaction; the DO in the aerobic...

Embodiment 3

[0040] Pass the spandex production wastewater (COD is 2500mg / L, NH3-N is 50mg / L, TN is 300mg / L) into the anaerobic tank, the pH is 9, the residence time is 25h, through anaerobic biological treatment, while degrading COD The organic nitrogen is converted into ammonia nitrogen, the COD of the anaerobic effluent is reduced to about 200mg / L, and 96% of the effluent TN is ammonia nitrogen; the effluent from the anaerobic pool enters the anoxic pool and the aerobic pool for synergistic nitrification and denitrification , the total residence time of the anoxic pool and the aerobic pool is 40h, the dissolved oxygen concentration in the aerobic pool is 3mg / L, and then the supernatant of the nitrification reaction in the aerobic pool is returned to the anoxic pool, this step can be used for denitrification The carbon source can reduce the COD load of the subsequent nitrification reaction, and can also use the nitrate nitrogen produced by the nitrification reaction; the DO in the aerobic...

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Abstract

The invention discloses a high concentration organic nitrogen waste water processing technology. The high concentration organic nitrogen waste water processing technology is mainly used for processingof organic waste water high in raw water total nitrogen, is capable of realizing high efficiency low consumption removing of carbon and nitrogen with a denitrification unit used for supplying a partof carbon sources, the total nitrogen, ammonia nitrogen, and chemical oxygen demand of discharged water are capable of reaching discharge standards. The high concentration organic nitrogen waste waterprocessing technology comprises following steps: high concentration organic nitrogen waste water is introduced into an anaerobic pond; water discharged from the anaerobic pond is introduced into a first sedimentation basin; a supernatant discharged from the first sedimentation basin is introduced into an anoxic pool, a part of bottom sludge from the first sedimentation basin is discharged, and the other part of bottom sludge from the first sedimentation basin is recycled back into the anaerobic pond; water discharged from the anoxic pool is introduced into a second sedimentation basin; a supernatant from the second sedimentation basin is introduced into an aerobic tank, and bottom sludge from the second sedimentation basin is discharged; water discharged from the aerobic tank is introduced into a third sedimentation basin; after precipitation in the third sedimentation basin, bottom sludge is discharged, and an obtained supernatant is recycled back into the anoxic pool; after anoxic pool reaction, obtained water is introduced into the second sedimentation basin, and then is introduced into the aerobic tank, and after reaction, water from the aerobic tank is introduced into the third sedimentation basin, and then is discharged.

Description

technical field [0001] The invention relates to a process for treating high-concentration organic nitrogen wastewater. Background technique [0002] Dissolved organic nitrogen exists widely in the ecosystem and can be directly absorbed by aquatic plants, which can easily cause eutrophication of water bodies. The increasingly stringent water quality discharge standards put forward stricter requirements on the content of nutrients such as carbon and nitrogen in the effluent, and the treatment of nitrogen-containing wastewater has received great attention, especially the effective disposal of high-concentration organic nitrogen wastewater. [0003] At present, wastewater from printing and dyeing and spandex industries has a high content of organic nitrogen and is difficult to treat. In practical engineering applications, the traditional high-concentration organic nitrogen wastewater treatment process has the following problems: (1) Most of them still use the traditional A / O an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/38
CPCC02F3/302C02F2301/043C02F2301/08C02F2101/38
Inventor 梅益军姚瑞
Owner 苏州德嘉环保工程有限公司
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