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Electroplating sewage treatment method

A sewage treatment method and sewage technology, applied in water/sewage treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as hazards, low treatment efficiency, single treatment method, etc., to improve chemical reaction Strength, save chemical reaction time, improve the effect of treatment effect

Inactive Publication Date: 2020-12-11
深圳市粤昆仑环保实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The prior art has the following deficiencies: in the existing electroplating sewage treatment process, the treatment method is relatively simple, the treatment efficiency is low, and the treated sewage contains more impurities. Although most of the heavy metals are separated, it still contains It is inconvenient to remove other impurities and fine particles produced by the treatment and reaction, and long-term accumulation is also harmful

Method used

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Effect test

Embodiment 1

[0029] A method for treating electroplating sewage, comprising the following steps:

[0030] Step 1, preliminary filtration, the electroplating sewage is introduced in the filter tank 1, by placing the oil-absorbing sponge 11 in the filter tank 1, and setting the first filter screen 12 on the other side of the filter tank 1, using the oil-absorbing sponge 11 to treat the sewage The grease substances floating on the surface are adsorbed and filtered, and then the sewage is initially filtered through the first filter screen 12, and then discharged into the aeration tank 2;

[0031] Step 2, chemical reduction, then add 12% FeSO4 solution with a solubility of 80mg / L to the aeration tank 2, then carry out aeration treatment, the treatment time is 20-30min, then add iron to the aeration tank 2 Powder, then carry out aeration treatment, the treatment time is 10-20 minutes, then the sewage is introduced into the sedimentation tank 3;

[0032] Step 3, sedimentation in the sedimentatio...

Embodiment 2

[0044] A method for treating electroplating sewage, comprising the following steps:

[0045] Step 1, preliminary filtration, the electroplating sewage is introduced in the filter tank 1, by placing the oil-absorbing sponge 11 in the filter tank 1, and setting the first filter screen 12 on the other side of the filter tank 1, using the oil-absorbing sponge 11 to treat the sewage The grease substances floating on the surface are adsorbed and filtered, and then the sewage is initially filtered through the first filter screen 12, and then discharged into the aeration tank 2;

[0046]Step 2, chemical reduction, then add 10% FeSO4 solution with a solubility of 78mg / L to the aeration tank 2, then perform aeration treatment, the treatment time is 20-30min, and then add iron to the aeration tank 2 Powder, then carry out aeration treatment, the treatment time is 10-20 minutes, then the sewage is introduced into the sedimentation tank 3;

[0047] Step 3, sedimentation in the sedimentati...

Embodiment 3

[0059] A method for treating electroplating sewage, comprising the following steps:

[0060] Step 1, preliminary filtration, the electroplating sewage is introduced in the filter tank 1, by placing the oil-absorbing sponge 11 in the filter tank 1, and setting the first filter screen 12 on the other side of the filter tank 1, using the oil-absorbing sponge 11 to treat the sewage The grease substances floating on the surface are adsorbed and filtered, and then the sewage is initially filtered through the first filter screen 12, and then discharged into the aeration tank 2;

[0061] Step 2, chemical reduction, then add 15% FeSO4 solution with a solubility of 75mg / L to the aeration tank 2, then perform aeration treatment, the treatment time is 20-30min, and then add iron to the aeration tank 2 Powder, then carry out aeration treatment, the treatment time is 10-20 minutes, then the sewage is introduced into the sedimentation tank 3;

[0062] Step 3, sedimentation in the sedimentat...

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Abstract

The invention discloses an electroplating sewage treatment method which comprises the following steps: carrying out preliminary filtration, carrying out chemical reduction, carrying out sedimentationin a sedimentation tank, carrying out secondary filtration, carrying out microbiological treatment, carrying out disinfection treatment, carrying out activated carbon adsorption, carrying out detection and discharge, carrying out detection of sewage treated in an activated carbon adsorption tank, carrying out discharge if the detection reaches the standard, reintroducing the sewage into the filtertank for secondary treatment if the detection does not reach the standard, arranging a screen frame in the activated carbon adsorption tank, and filling activated carbon particles in the screen frame, so that the sewage is effectively adsorbed and filtered by activated carbon. The sewage is subjected to chemical treatment in the aeration tank and aeration treatment at the same time, the chemicalreaction intensity in the sewage is improved, the chemical reaction time is saved, heavy metals in the sewage are precipitated by adding alkaline substances, and meanwhile, the sewage is further slowly adsorbed by utilizing the activated carbon adsorption tank, the sewage treatment effect is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an electroplating sewage treatment method. Background technique [0002] The composition of sewage produced in electroplating production is very complex. In addition to cyanide (CN-) and acid and alkali, heavy metals are potentially extremely harmful sewage categories in the electroplating industry. These substances seriously endanger the environment and human health. The treatment of electroplating sewage is in At home and abroad, it has been widely valued, and a variety of treatment technologies have been developed to eliminate and reduce the discharge of pollutants through measures such as treating toxic to non-toxic, converting harmful to harmless, recycling precious metals, and recycling water. With the development of the electroplating industry With rapid development and increasing environmental protection requirements, electroplating sewage treatment has begun to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/16
CPCC02F9/00C02F1/001C02F1/52C02F3/34C02F7/00C02F1/50C02F1/281C02F2103/16
Inventor 夏观强周亮谭珞萍陈凤王业贵王应志杨勇
Owner 深圳市粤昆仑环保实业有限公司
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