Process for treating high-concentration organic wastewater in tobacco sheet industry

A technology for organic wastewater and tobacco flakes, applied in multi-stage water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of high operating costs, wastewater failing to meet the first-level discharge standard, and high chromaticity of effluent. , to reduce operating costs, improve biochemical capacity, and reduce load

Inactive Publication Date: 2015-01-14
上海正泽环保科技有限公司
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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 leaf production lines have set up corresponding wastewater treatment projects. At present, the treatment process of "sedimentation → anaerobic → aerobic biochemical → coagulation and air flotation" is mainly used. The mixed treatment of concentrated wastewater generally has the problems of 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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  • Process for treating high-concentration organic wastewater in tobacco sheet industry

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Embodiment 1

[0024] A domestic coastal tobacco flake company produces 5,000 tons of tobacco flakes annually, and produces 60m of high-concentration organic wastewater per day 3 , Take 2 m3 of high-concentration organic wastewater every day. After testing, the range of COD is 120,000~180,000mg / l, the range of PH value is 5~6, and the chromaticity is more than 2000 times. Using the processing method of the present invention:

[0025] Step 1. The high-concentration organic wastewater enters the coagulation tank through the collection device, and the coagulant and flocculant are added to the coagulation tank for coagulation treatment. The coagulant is polyaluminum chloride and the flocculant is cationic polyacrylamide. , The sludge produced by the reaction is discharged into the sludge treatment system;

[0026] Step 2. The supernatant in step 1 enters the electrocoagulation reaction cell, and the current density is controlled to 40 mA / cm 2 , Reaction for 10 minutes, the sludge produced by the reac...

Embodiment 2

[0030] In the laboratory, the production process of the tobacco flake factory is simulated, and 0.5m3 of high-concentration wastewater is prepared every day, the COD varies from 70,000 to 80,000 mg / l, the PH value is from 5 to 6, and the color is greater than 2000 times. Using the treatment method of the present invention: the high-concentration organic wastewater enters the coagulation tank through the collection device, and the coagulant and flocculant are added to the coagulation tank for coagulation treatment. The coagulant adopts polyferric sulfate and the flocculant adopts cation Polyacrylamide, the supernatant enters the electrocoagulation reaction cell, and the current density is controlled to 20 mA / cm 2 , The reaction is 8min, other processes are the same as in Example 1.

[0031] Tested: COD removal rate is 88~91%, chroma is less than 30 times.

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Abstract

The invention provides a process for treating high-concentration organic wastewater in the tobacco sheet industry. The process comprises the following steps: high-concentration organic wastewater flows through a collection device and enters a coagulating basin, and a coagulant and a flocculating agent are added into the coagulation basin for coagulation treatment; the supernatant enters an electrocoagulation reaction pool; and treated wastewater enters a FENTON reaction pool, the supernatant of the high-concentration organic wastewater treated by strong oxidation and low-concentration wastewater are mixed and enter a low-concentration sewage treatment system, and sludge generated in reactions is discharged into a sludge treatment system. By adopting the process, the chrominance in water can be completely removed, and the effluent chrominance of the system is less than 80 times, and achieves the first-grade drainage standard; and refractory substances in the high-concentration wastewater can be removed, and the biochemical availability of the whole system can be improved.

Description

Technical field [0001] The invention relates to a treatment process for high-concentration organic wastewater with high pollution, high chroma and difficult to degrade, in particular to a treatment process for high-concentration wastewater suitable for the tobacco flake industry. Background technique [0002] The tobacco flake industry has developed into a fairly mature industry abroad and is widely used by the international tobacco industry. The tobacco flake industry is still in the early stage of domestic development and has great development potential. In 2010, the State Tobacco Monopoly Administration announced a timetable for reducing the tar and harm of cigarettes, and included paper-making tobacco flakes as one of the key development areas of the National Tobacco Industry’s "Twelfth Five-Year Plan". Tobacco flakes are made into flakes close to tobacco leaves using discarded tobacco stems, tobacco dust and tobacco slices as raw materials, and then used in cigarette product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F9/00C02F1/463C02F1/5236C02F1/722C02F2101/30C02F2301/08
Inventor 潘骁伟黄勇王永全毛积伦尚妮娜
Owner 上海正泽环保科技有限公司
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