Process for treating used water difficult to degradate by catalytic internal electrolysis of iron

A technology for internal electrolysis and iron catalysis, which is applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc. Inexpensive, improved processing effect and speed, powerful effect

Inactive Publication Date: 2002-12-04
上海城市污染控制工程研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the electrolysis of iron and iron-coke has many advantages, the iron filings will form agglomerates after long-term operation, and the effect will be greatly reduced, and it may even fail to operate.
This is the reason why this technology cannot be well applied and promoted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: compare the effect of treating waste water with the method of the present invention and prior art.

[0018] Step 1: Weigh three parts of iron filings with the same weight. The first part is pure iron filings without catalyst copper and modified zeolite, called filter material A; the second part is added with catalyst copper, iron filings and copper filings Press W Cu / W Fe =0.6 ratio, fully mixed to form filter material B; the third part is based on the second part, plus 3% cationic surfactant-modified zeolite of the total amount of iron filings and copper filings, fully mixed to form filter material c. A, B, and C three filter materials are put into three filter tanks respectively. The following implementation steps are the same.

[0019] The second step: adjust the pH of the wastewater in the filter to 8.5, and let the wastewater circulate in the above filter at a reflux ratio of 5:1 without aeration at room temperature. The hydraulic retention time ...

Embodiment 2

[0023] Embodiment 2: Gasoline wastewater is treated with the method of the present invention.

[0024] Step 1: Press the copper and iron sheets to W Cu / W Fe =0.5 Proportional weighing is good, add the zeolite modified by cationic surfactant of 3% of the total weight of copper sheet and iron sheet, fully mix and form filter material and put into filter tank.

[0025] The second step: adjust the pH of the waste water to 8.0, and let the waste water circulate in the above-mentioned filter tank with a reflux ratio of 6:1 at room temperature without aeration. The hydraulic retention time is 1 hour, so that the waste water can fully react in the filter tank.

[0026] The third step: Static precipitation for 30 minutes, measure its supernatant, the results are shown in Table 2.

[0027] Wastewater species

Embodiment 3

[0028] Embodiment 3: use the method of the present invention to the processing of industrial zone waste water

[0029] Step 1: Press the copper and iron sheets to W Cu / W Fe =0.4 Proportion Weighing is good, add the zeolite modified by cationic surfactant of 3% of the total weight of copper sheet and iron sheet, fully mix, put into filter tank.

[0030] Step 2: adjust the pH of the waste water to 7.5, let the waste water circulate in the above-mentioned filter tank with a reflux ratio of 6:1 at room temperature without aeration, and the hydraulic retention time is 2 hours, so that the waste water can fully react in the filter tank.

[0031] Step 3: After the reflux, adjust the pH to 8.5, settle for 30 minutes, and measure the supernatant (see Table 3).

[0032] waste water

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PUM

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Abstract

A process for removing heavy metals and the organic substance difficult to degradate from sewage includes proportioning Fe and Cu, adding cationic surfactant modified zeolite, stirring, loading the mixture in filter pool, regulating pH value to 4.5-11, reaction, and regulating pH value to 8-9 to generate Fe(OH)3 as flocculant, which can coagulate the suspended solid and colloid and absorb and soluble pollutants for depositing them. Its advanrtages are high power, effect and high speed.

Description

technical field [0001] The invention relates to a process for treating refractory industrial waste water. It further involves as a biochemical pretreatment method to first remove heavy metals and organic refractory substances that are toxic and harmful to microorganisms in refractory industrial wastewater, increase the value of BOD / COD, and make wastewater more suitable for subsequent biochemical treatment. Background technique [0002] Wastewater discharged during industrial production often contains a large amount of refractory organic pollutants and harmful heavy metals. Such chemical substances are persistent and will remain in the environment for a long time, causing serious harm to the environment. According to statistics, 80% of diseases in the world are related to water pollution, and a large number of pollutants in water seriously threaten human health. Usually, the BOD / COD ratio of industrial wastewater is much smaller than that of domest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/463C02F1/58C02F9/02C02F9/06
Inventor 徐文英周荣丰马鲁铭高廷耀
Owner 上海城市污染控制工程研究中心有限公司
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