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Organic waste liquid treatment method

A technology of organic waste liquid and treatment method, applied in water/sewage treatment, chemical instruments and methods, flotation water/sewage treatment, etc., can solve the problems of poor biodegradability, high cost, and low COD reduction of organic waste liquid, etc. To achieve the effect of easy control of the treatment process, less power consumption and less investment cost

Inactive Publication Date: 2015-04-29
PEKING UNIV FOUNDER GRP CO LTD +3
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for treating PCB organic waste liquid, so as to solve the technical problems of high cost, poor biodegradability of organic waste liquid and less reduction of COD in existing treatment methods

Method used

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with drawings and embodiments.

[0024] see figure 2 , the organic waste liquid (ink waste water) generated by the PCB production line is treated by the following methods:

[0025] 1) Adjust the pH of the organic waste liquid to 2-3, aerate and stir, the organic waste liquid will precipitate jelly, and remove the scum;

[0026] 2) Add alkali to adjust the pH value to 8~9, add 1~2g / L potassium permanganate (that is, put 1~2g potassium permanganate into 1L waste liquid), and react for 20~40min;

[0027] 3) Add flocculant FeSO 4 and coagulant PAM, coagulate and precipitate, and then filter through a filter press;

[0028] 4) The filtrate obtained in step 3) is filtered by activated carbon adsorption and discharged up to the standard.

[0029] In the acid analysis treatment of the above step 1), the pH of the organic waste liquid can be adjusted by using the waste acid liquid produced on the PCB produ...

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Abstract

The invention discloses an organic waste liquid treatment method which comprises the following steps: firstly adjusting the pH value of an organic waste liquid to 2-3, aerating and stirring, separating out jellies from the organic waste liquid, and fishing out dross; then adding an alkaline to adjust the pH value to 8-9, inputting 1-2g / L potassium permanganate and reacting for 20-40 minutes; then adding a flocculant FeSO4 and a coagulant aid PAM for coagulating sedimentation and filter pressing by virtue of a filter press; and adsorbing and filtering the filtrate by active carbon to be discharged in a standard manner. The method disclosed by the invention is easy to control the treatment process, is extremely implemented in the existing process, and meets the requirement of industrial production.

Description

technical field [0001] The invention relates to organic waste liquid treatment, in particular to a treatment method for organic waste liquid produced in the production of printed circuit boards. Background technique [0002] In the production process of printed circuit board (PCB), organic waste liquid is mainly produced in the developing and stripping stages, and a large amount of ink or dry film is dissolved in the developing and stripping waste liquid, which is a high-concentration organic Wastewater, COD can reach 11000mg / L. Although organic waste liquid only accounts for about 5% of the total discharge of printed circuit board (PCB) wastewater, it contributes 80% to the COD of all wastewater. Therefore, exploring a feasible treatment process to effectively remove the organic components in PCB organic waste liquid is very important for the overall COD of PCB wastewater to reach the standard. [0003] The traditional organic waste liquid treatment process includes acid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/24C02F1/283C02F1/52C02F1/66
Inventor 孙志刚
Owner PEKING UNIV FOUNDER GRP CO LTD
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