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Coke wastewater advanced treatment method utilizing catalytic internal electrolysis technology and coupled two-stage bio-filter

A biofilter and coking wastewater technology, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the unsatisfactory removal effect of refractory and refractory organic matter , It is difficult to achieve the treatment effect and other problems, and achieve the effect of simple process, easy promotion and application, and improved biodegradability

Inactive Publication Date: 2014-07-23
TONGJI UNIV
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Problems solved by technology

[0007] As a commonly used enhanced biological treatment technology, the biological aerated filter is usually used in the advanced biological treatment of wastewater. This process has a good treatment effect on nitrogen-containing pollutants in industrial wastewater, but it is difficult to The removal effect of degraded organic matter is not ideal, because the biochemical effluent of coking wastewater is almost refractory to biodegradable pollutants, so it is often difficult to achieve the ideal treatment effect by using a biological filter alone for advanced treatment of coking wastewater

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  • Coke wastewater advanced treatment method utilizing catalytic internal electrolysis technology and coupled two-stage bio-filter

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Embodiment 1

[0025] please see figure 1 .

[0026] Biochemical effluent (COD) from a coking plant Cr 290mg / L, NH 3 -N is 21mg / L, TN is 60mg / L, and chromaticity is 250 times) Add a certain amount of waste acid solution into the wastewater, stir, and adjust the pH value of the wastewater to about 3.

[0027] Add self-made iron-carbon Pall ring fillers to the wastewater, add fillers at a ratio of 10 fillers / L wastewater, aerate for 2 hours, and discharge water;

[0028] According to the configuration of slaked lime: water = 5: 100 (mass ratio), stir evenly to obtain a mixed solution, add the mixed solution to the wastewater effluent after internal electrolytic aeration, and the dosage of the mixed solution depends on the pH value of the effluent to 8 ~9 shall prevail;

[0029] Then add commercially available anionic polyacrylamide, so that the content of polyacrylamide in the wastewater is 0.5ppm. After stirring for half an hour, let it stand for half an hour to settle, and then detect th...

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Abstract

The invention relates to a coke wastewater advanced treatment method utilizing a catalytic internal electrolysis technology and a coupled two-stage bio-filter. The method adopts a catalytic internal electrolysis method as the main processing technology to carry out a pretreatment on the coke wastewater biochemical effluent so as to improve the wastewater biodegradability, and then utilizes a two-stage bio-filter to carry out bio-processing to further degrade the pollutants in the wastewater. The method combines an electrochemical method and a biochemical method to degrade and remove pollutants in coke wastewater, thus has a high impact-resistant capacity, can remove COD, ammonia-nitrogen, and total nitrogen from the whole system at the same time, and greatly reduces the effluence color degree. The effluence processed by the method has a good water quality, and can stably meet the "emission standard of pollutants for coking chemical industry" (GB 16171-2012).

Description

technical field [0001] The invention relates to a method for advanced treatment of coking wastewater by coupling two-stage biological filters with catalytic internal electrolysis, and belongs to the technical field of advanced treatment of industrial wastewater. Background technique [0002] Coking wastewater is wastewater generated during high-temperature dry distillation of coal, gas purification and refining of chemical products. Coking wastewater mainly contains pollutants such as ammonia nitrogen, cyanide, phenolic compounds, polycyclic aromatic compounds, heterocyclic compounds containing nitrogen, oxygen, and sulfur, and aliphatic compounds. In addition to complex components, coking wastewater also has water quality fluctuations. It has the characteristics of large amplitude, poor biodegradability, high chroma, and high toxicity. It is a typical refractory biodegradable high-concentration organic industrial wastewater. Such water quality characteristics determine tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 潘碌亭韩悦
Owner TONGJI UNIV
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