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Catalytic aluminium internally electrolyzing process of treating sewage

A technology of internal electrolysis and catalysis of aluminum, applied in chemical instruments and methods, water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as ineffective treatment of sewage, improve treatment effect and speed, and have a large pH range Effect

Inactive Publication Date: 2005-03-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot effectively treat some colored and refractory sewage

Method used

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  • Catalytic aluminium internally electrolyzing process of treating sewage

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: dye sewage is treated with the method of the present invention.

[0018] Industrial dyed sewage, dark purple in color. pH=10.0.

[0019] Step 1: Press metal copper and aluminum filings to W Cu / W Al =1.0 Proportional weighing is good, add the cationic surfactant modified zeolite of 7% of the total weight of copper and aluminum, fully mix to form packing and put it into the filter tank.

[0020] The second step: adjust the pH of the sewage to 6.0, let the sewage circulate in the filter with a reflux ratio of 5:1 at room temperature without aeration, and the hydraulic retention time is 2.5 hours, so that the sewage can fully react in the filter.

[0021] Step 3: Settling still for 30 minutes, measuring the supernatant, the B / C increased after treatment, the results are shown in Table 1.

[0022]

Embodiment 2

[0023] Embodiment 2: process printing and dyeing sewage with the inventive method

[0024] Printing and dyeing sewage, dark blue, pH ≈ 7.0.

[0025] Step 1: Press metal copper and aluminum filings to W Cu / W Al =0.2 The ratio is well weighed, and 1% of the total weight of copper and aluminum is added to the cationic surfactant-modified zeolite, which is fully mixed to form a filler and put into the filter tank.

[0026] The second step: without aeration at normal temperature, let the sewage circulate in the above-mentioned filter tank with a reflux ratio of 2:1, and the hydraulic retention time is 1.5 hours, so that the sewage can fully react in the filter tank.

[0027] The third step: the reflux is finished, and the sedimentation is static for 30 minutes, and the supernatant is measured, and the results are shown in Table 2.

[0028] sewage

Embodiment 3

[0029] Embodiment 3: The method of the present invention is compared with the catalytic iron internal electrolysis method for sewage treatment.

[0030] Papermaking sewage, respectively use catalytic iron internal electrolysis method and this method parallel test, process 11 hours, its result is shown in table 3:

[0031]

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Abstract

The present invention relates to the treating process of sewage, and especially sewage with color and hard-to-degrade matter. Stuffing with aluminum, copper and cationic surfactant modified zeolite is used as catalyst is used in treating sewage. Aluminum replacing iron and copper constitute primary cell with high electromotive force, so that many heavy metal and organic pollutants can react on the electrode directly under oxygen-deficient condition. The aluminum and copper material used may be leftover from machining and the cationic surfactant modified zeolite is not expensive, so the present invention has low water treating cost. In addition, the process of the present invention has less sludge produced and the sludge has good deposition performance, so that the process of the present invention may be combined with catalytic iron internally electrolyzing process in treating sewage with color and hard-to-degrade matter.

Description

technical field [0001] The invention relates to a treatment method for sewage (domestic sewage and industrial sewage), in particular to a treatment method for colored and refractory sewage. Background technique [0002] Colored and refractory industrial wastewater has always been a major issue in environmental water treatment. To solve this problem, various treatment methods have been developed. Among them, the iron internal electrolysis method, iron carbon internal electrolysis method and catalytic iron internal electrolysis method, which use metal processing waste iron chips as filter beds, have all played a certain role in the treatment of this kind of sewage. The catalytic iron internal electrolysis method provides an effective treatment method for colored, refractory organic pollutants and harmful heavy metal industrial wastewater. The basic principle is to add copper and cationic surfactants to the iron internal electrolysis method. [0003] Zeolite is used as a catal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/463C02F1/66
Inventor 周荣丰徐文英马鲁铭高廷耀
Owner TONGJI UNIV
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