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

A technology of internal electrolysis and catalytic iron, which is applied in the direction of chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of iron filings agglomeration, failure to operate, and decline in effect, and achieve treatment costs Inexpensive, improved processing effect and speed, powerful effect

Inactive Publication Date: 2004-09-22
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] Example 1: Comparison of the effects of the method of the present invention and the prior art in treating wastewater.

[0018] The first step: weigh three parts of iron filings with the same weight. The first part is pure iron filings without adding catalyst copper and modified zeolite, called filter media A; the second part is adding 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 and 3% cationic surfactant modified zeolite of the total amount of iron filings and copper filings is added, fully mixed to form filter media C. Three filter materials A, B and C are put into three filter tanks respectively. The following implementation steps are the same.

[0019] Step 2: Adjust the pH of the wastewater in the filter to 8.5, let the wastewater circulate in the filter with a reflux ratio of 5:1 at room temperature without aeration, and the hydraulic retention time is 1....

Embodiment 2

[0023] Example 2: Using the method of the present invention to treat gasoline wastewater.

[0024] Step 1: Press W on the copper and iron sheets Cu / W Fe =0.5 The proportion is well weighed, and 3% of the total weight of the copper flakes and the iron flakes are added to the cationic surfactant modified zeolite, and the filter material is fully mixed and placed into the filter tank.

[0025] The second step: adjust the pH of the wastewater to 8.0, let the wastewater circulate in the filter tank with a reflux ratio of 6:1 at room temperature without aeration, and the hydraulic retention time is 1 hour to make the wastewater fully react in the filter tank.

[0026] The third step: stand still for 30 minutes and measure the supernatant. The results are shown in Table 2.

[0027] Wastewater

Embodiment 3

[0028] Example 3: Treatment of wastewater in a chemical industry zone by the method of the present invention

[0029] Step 1: Press W on the copper and iron sheets Cu / W Fe =0.4 The proportion is well weighed, and 3% of the total weight of copper flakes and iron flakes are added with cationic surfactant-modified zeolite, mixed thoroughly, and put into the filter tank.

[0030] Step 2: Adjust the pH of the wastewater to 7.5, and let the wastewater circulate in the filter tank with a reflux ratio of 6:1 at room temperature without aeration. The hydraulic retention time is 2 hours to make the wastewater fully react in the filter tank.

[0031] The third step: after refluxing, 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 an industrial wastewater treatment process that is difficult to degrade. It further relates to a biochemical pretreatment method, which first removes heavy metals and organic non-degradable substances that are toxic and harmful to microorganisms in the refractory industrial wastewater, and increases the value of BOD / COD to make the wastewater more suitable for subsequent biochemical treatment. Background technique [0002] Wastewater discharged during industrial production often contains a large number 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 bodies seriously threaten human's own health. Generally, the BOD / COD ratio of industrial was...

Claims

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Application Information

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Patent Type & Authority Patents(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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