Advanced treatment method for degradation-resistant organic wastewater

A technology for organic wastewater and advanced treatment, which is applied in the fields of oxidized water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems that the effluent cannot be guaranteed to meet the standard, the area is large, and the process is cumbersome. Good effect, simple process effect

Active Publication Date: 2014-12-17
北京国中科创环境科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these refractory organic wastewater treatment process systems not only occupy a large area, but the process is cumbersome and costly, and it cannot guarantee that the effluent is fully up to standard, and needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Perform primary coagulation and sedimentation treatment on the effluent of the biochemical unit with a COD concentration of 270-290mg / L. The specific process is as follows:

[0031] (1-1) Add coagulant polymerized ferric sulfate to the waste water, stir rapidly for 5 minutes at a stirring speed of 230r / min to obtain the first solution, and the weight-to-volume ratio of polymerized ferric sulfate to waste water is 100mg / L. The coagulant polyferric sulfate used can be produced by Shenzhou Huamei (Beijing) Technology Co., Ltd., and the effective iron content is ≥ 18%;

[0032] (1-2) Continue stirring the first solution in the above steps (1-1) at a medium speed for 7 minutes at a stirring speed of 130 r / min to obtain the second solution;

[0033] (1~3) Add coagulant aid anionic polyacrylamide to the second solution of the above steps (1~2), stir at a slow speed for 8 minutes, and the stirring speed is 60r / min to obtain the third solution, polyacrylamide and waste water...

Embodiment 2

[0040] (1) Perform primary coagulation and sedimentation treatment on the effluent of the biochemical unit with a COD concentration of 240-270mg / L. The specific process is as follows:

[0041](1-1) Add the coagulant polyaluminum chloride to the waste water, and stir rapidly for 6 minutes at a stirring speed of 220r / min to obtain the first solution. The weight-to-volume ratio of the polyaluminium chloride to the waste water is 90 mg / L. The coagulant polyaluminum chloride used can be produced by Zhengzhou Runquan Chemical Products Co., Ltd., and the active ingredient is ≥ 28%;

[0042] (1-2) Continue stirring the first solution in the above steps (1-1) at a medium speed for 6 minutes at a stirring speed of 120 r / min to obtain the second solution;

[0043] (1~3) Add coagulant cationic polyacrylamide to the second solution of the above steps (1~2), stir at a slow speed for 7 minutes, and the stirring speed is 55r / min to obtain the third solution, polyacrylamide and waste water Th...

Embodiment 3

[0051] (1) Perform primary coagulation and sedimentation treatment on wastewater with a COD concentration of 210-240 mg / L. The specific process is as follows:

[0052] (1~1) Add coagulant polyaluminum ferric chloride to the waste water, stir rapidly for 4 minutes at a stirring speed of 230r / min to obtain the first solution, the weight-to-volume ratio of polyaluminum ferric chloride to waste water is 90mg / L . The coagulant polyaluminum ferric chloride used can be produced by Shanghai Bilang Environmental Protection Technology Co., Ltd., and the active ingredient is ≥ 29%;

[0053] (1-2) Continue stirring the first solution in the above steps (1-1) at a medium speed for 6 minutes at a stirring speed of 130 r / min to obtain a second solution;

[0054] (1~3) Add the coagulant amphoteric polyacrylamide to the second solution of the above steps (1~2), stir slowly for 7 minutes, and the stirring speed is 50r / min to obtain the third solution, polyacrylamide and waste water The weight...

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PUM

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Abstract

The invention relates to an advanced treatment method for degradation-resistant organic wastewater, belonging to the technical field of environmental protection. The method comprises the following steps: firstly, carrying out first level coagulating sedimentation treatment on wastewater, namely sequentially adding a coagulant and a coagulant aid into the wastewater, reacting while stirring, and carrying out solid liquid separation to obtain supernate; then, carrying out second level chemical oxidizing coagulating sedimentation, namely sequentially adding a chemical oxidizing agent, a coagulant and a coagulant aid into the supernate, and reacting while stirring; and finally carrying out solid liquid separation to obtain supernate so as to achieve discharge with standard level. According to the advanced treatment method for degradation-resistant organic wastewater provided by the invention, the treatment system is simple in process flow, small in occupied area, good in controllability and convenient to operate, and the operating cost and the occupying area for organic sewage treatment can be effectively lowered. Moreover, the advanced treatment effect of the wastewater is good, and the final effluent achieves the discharge requirements.

Description

technical field [0001] The invention relates to an advanced treatment method for refractory organic wastewater, which belongs to the technical field of environmental protection engineering. Background technique [0002] In recent years, with the rapid development of industry and agriculture, various wastewater containing a large amount of refractory organic pollutants has increased correspondingly, such as coking wastewater, pharmaceutical wastewater (including traditional Chinese medicine wastewater), petrochemical / oil wastewater, textile / printing and dyeing wastewater, chemical wastewater, etc. . Most of the organic matter in the above-mentioned wastewater is decomposed by microorganisms very slowly, and the incompletely decomposed organic matter (including some metabolites of organic matter) is easy to accumulate in the organism and become a potential source of water pollution. Such toxic and refractory organic pollutants include polycyclic aromatic hydrocarbons, halogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/76
Inventor 秦余春程振敏张杨邓志强杨尹刘峰王宝臣
Owner 北京国中科创环境科技有限责任公司
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