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Method for treating highly acid-basic industrial sewage by metal aluminium

A technology for industrial sewage and metal aluminum, which is used in neutralization water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve problems such as poor water treatment effect, copper corrosion, and difficulty in sewage treatment, and achieve low treatment costs. , The amount of sludge is small, which is conducive to the effect of purification

Inactive Publication Date: 2005-05-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is still difficult to treat such sewage
If the catalytic iron internal electrolysis method is used for treatment, copper may be corroded (such as basic copper carbonate) under strong alkali conditions, and the effect of water treatment is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Using the method of the present invention to treat dye wastewater.

[0014] Industrial dyeing wastewater, dark purple-red, pH=13.5.

[0015] The first step: use industrial waste aluminum chips to form a filter bed.

[0016] The second step: Use a reflux ratio of 0:1 to circulate the sewage in the filter tank of the filter bed, and the hydraulic retention time is 45 minutes to make the sewage fully react in the filter tank.

[0017] The third step: adjust the pH of the sewage to 9.0, stand still for 30 minutes, and measure the supernatant. The results are shown in Table 1.

[0018]

Embodiment 2

[0019] Example 2: Using the method of the present invention to treat acidic printing and dyeing wastewater.

[0020] A certain printing and dyeing wastewater is dark blue with pH=3.8.

[0021] The first step: use industrial waste aluminum chips to form a filter bed.

[0022] The second step: using a reflux ratio of 3:1 to allow the sewage to circulate in the filter tank of the filter bed, and the hydraulic retention time is 1.5 hours to make the sewage fully react in the filter tank.

[0023] The third step: adjust the pH of the sewage to about 6.0, and settle for 30 minutes. The results of the supernatant are shown in Table 2.

[0024]

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PUM

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Abstract

The method for treating high-acid and high-alkaline industrial sewage with metal aluminum relates to a method for treating high-acid and high-alkaline industrial sewage, and is especially suitable for the treatment of high-acid and alkaline printing and dyeing sewage. The present invention adopts metal aluminum as the filter bed for water treatment, adjusts the pH value of high-acid or high-alkaline sewage according to the severity of hydrogen release allowed by sewage treatment, allows sewage to circulate in the filter tank and makes the sewage flow in the filter tank There is sufficient reaction time, and then adjust the pH of the sewage to further generate a flocculant, coagulate the suspended solids and colloids in the sewage, and precipitate together with the soluble pollutants in the sewage, so that the sewage can be treated and purified. The invention can directly treat high-acid and high-alkaline sewage, reducing the dose of medicine for pH adjustment. Since the metal aluminum used is the waste material of workpiece processing, the cost of water treatment can be effectively reduced; and the method of the invention produces less sludge and has good settling properties, which is beneficial to the purification of sewage.

Description

Technical field [0001] The invention relates to a method for the treatment of high acid and high alkaline industrial sewage, and is particularly suitable for the treatment of high acid and high alkaline printing and dyeing sewage. Background technique [0002] Non-ferrous, 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, the iron-carbon internal electrolysis method and the catalytic reduction iron internal electrolysis method using the iron scraps discarded from metal processing as the filter bed have a certain effect on the treatment of this kind of sewage. [0003] But for some industrial wastewater with high acidity or alkalinity, such as printing and dyeing wastewater, because a large amount of caustic soda is often added in the printing and dyeing process, its pH value is very high, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/66
Inventor 周荣丰徐文英马鲁铭高廷耀
Owner TONGJI UNIV