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Technology for treating high-concentration wastewater of tobacco sheet industry by electrochemical oxidation method

A tobacco flake, electrochemical technology, applied in the field of high-concentration wastewater treatment process, can solve the problems of high operating costs, wastewater cannot meet the first-level discharge standard, and high chroma of effluent, so as to reduce operating costs, improve biochemical ability, The effect of reducing the load

Inactive Publication Date: 2013-11-20
上海正泽环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) Deep color: high-concentration wastewater contains high-concentration sugar and protein, which are stable in structure and difficult to degrade
[0007]At present, domestic reconstituted tobacco production lines have been equipped with corresponding wastewater treatment projects. Treatment process, these processes are mixed treatment of high-concentration wastewater and low-concentration wastewater, and there are common problems such as high operating costs, high chroma of effluent, high COD of effluent, and wastewater that cannot meet the first-level discharge standard

Method used

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  • Technology for treating high-concentration wastewater of tobacco sheet industry by electrochemical oxidation method

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Experimental program
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Effect test

Embodiment 1

[0022] A well-known domestic inland tobacco sheet company produces 5,000 tons of tobacco sheets annually, and produces 80 m3 of high-concentration organic wastewater per day. It takes 2 m3 of high-concentration organic wastewater every day. After testing, the COD ranges from 130,000 to 180,000 mg / l, and the pH value is 5~6, the chromaticity is greater than 3000 times.

[0023] Use the treatment process of the present invention:

[0024] Step 1, the high-concentration organic wastewater enters the coagulation tank through the collection device, and coagulant and flocculant are added to the coagulation tank for coagulation treatment. The coagulant is polyaluminum chloride, and the flocculant is polyacrylamide. The sludge generated by the reaction is discharged into the sludge treatment system;

[0025] Step 2, the supernatant in step 1 enters the electrochemical oxidation reaction tank for oxidation treatment, controls the current density to 40 mA / cm2, and reacts for 20 minutes...

Embodiment 2

[0028] To simulate the production process of tobacco sheet factory in the laboratory, 0.5m3 of high-concentration wastewater is prepared every day, the range of COD is 70000~80000mg / l, the pH value is 5~6, and the chromaticity is more than 2000 times.

[0029] Using the treatment process of the present invention: step 1, the high-concentration organic wastewater enters the coagulation tank through the collection device, and adds coagulant and flocculant to the coagulation tank for coagulation treatment. The coagulant adopts iron sulfate, and the flocculant Using polyacrylamide, the sludge generated by the reaction is discharged into the sludge treatment system;

[0030] In step 2, the supernatant in step 1 enters the electrochemical oxidation reaction tank for oxidation treatment, and the current density is controlled to 50 mA / cm2 for 25 minutes. After the reaction, the supernatant is mixed with low-concentration wastewater and enters the low-concentration wastewater treatment ...

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Abstract

The invention discloses a technology for treating high-concentration wastewater of tobacco sheet industry by an electrochemical oxidation method. The high-concentration wastewater is conveyed into a coagulating basin via a collection device, coagulant and flocculant are added into the coagulating basin for performing coagulation treatment, and sludge generated by reaction is discharged into a sludge treatment system; the liquid supernatant of reaction is conveyed to an electrochemical oxidation reaction tank for performing oxidation treatment, the liquid supernatant generated after reaction is mixed with the low-concentration wastewater, the mixture is conveyed to a low-concentration wastewater treatment system, and the sludge generated by reaction is discharged into the sludge treatment system. With the technology provided by the invention, the chromaticity in water can be removed completely, the chromaticity of the system effluent is guaranteed to be less than 80 times, and the system effluent can reach the first grade of waste discharge standard; the substances which are difficult to degrade in the high-concentration wastewater can be removed, thus, the biodegradation capability of the whole system is improved.

Description

technical field [0001] The invention relates to a treatment process for high-concentration organic wastewater with high pollution, high chroma and refractory degradation, and is especially suitable for the treatment process for high-concentration wastewater in the tobacco sheet industry. Background technique [0002] The tobacco sheet industry has developed into a fairly mature industry abroad and is widely used by the international tobacco industry. The domestic development of the tobacco sheet industry is still in its infancy and has great potential for development. In 2010, the State Tobacco Monopoly Administration announced the timetable for cigarette tar reduction and harm reduction, and included paper-making tobacco sheet as one of the key development areas of the national tobacco industry's "Twelfth Five-Year Plan". Tobacco sheet is made of tobacco stems, tobacco powder and tobacco sheets discarded during the cigarette making process as raw materials to make thin shee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
Inventor 周晓金连燕峰尚妮娜王力刘学谦
Owner 上海正泽环保科技有限公司
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