Solid-liquid enrichment separation method for tobacco sheet wastewater in paper-making method

A technology of tobacco sheet and separation method, which is applied in the directions of tobacco, tobacco preparation, tobacco treatment, etc., to achieve the effect of strong pertinence, easy implementation, and reduction of subsequent biochemical treatment load

Inactive Publication Date: 2010-06-16
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, starting from the waste water, the solid-liquid enrichment and separation are performed first, then the nicotine is extracted from the dry mud, and finally the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

Example 1:

Solid-liquid enrichment and separation of the comprehensive waste water of Hubei Xinye Tobacco Flake Development Co., Ltd. papermaking method tobacco flakes. The wastewater was provided by Wuhan Green Environmental Facility Operation Co., Ltd., and was grade A flake production wastewater. PFS in the Fe system, PAC in the Al system, PAFS in the Al-Fe composite system, diatomaceous earth, bentonite, activated carbon and other flocculants or adsorbents, respectively, and the Ca-Mg system composite flocculant prepared by the present invention Carry out parallel contrast solid-liquid enrichment and separation treatment to evaluate the separation effect.

The prepared Ca-Mg series complex coagulant is a stable mixed coagulant powder, which can be made from commercially available CaSO 4 ·2H 2 O, Mg(OH) 2 , Ca(OH) 2 Made of raw materials. The powder can be first according to the chemical formula CaSO 4 ·2H 2 O: Mg(OH) 2 : Ca(OH) 2 =(0.8-1.1):(1.5-2.5):(8-12) molar ratio for ...

Example Embodiment

Example 2:

The treated wastewater was taken from the same manufacturer as in Example 1, and was grade B flake production wastewater. The soluble salts of Fe, Ca, Mg, Al, Zn and other metals were compared with the Ca-Mg series compound coacervation prepared by the present invention. The solid-liquid enrichment and separation effect of the agent. The dosage of Example 2 is subject to the dosage of the Ca-Mg-based complex coagulant prepared by the present invention with other agents. The remaining implementation conditions and measured technical indicators are exactly the same as those of Example 1, specifically:

The Ca-Mg mixed coagulant is a stable mixed coagulant powder, which can be made from commercially available CaSO 4 ·2H 2 O, Mg(OH) 2 , Ca(OH) 2 Made of raw materials. The powder can be first according to the chemical formula CaSO 4 ·2H 2 O: Mg(OH) 2 : Ca(OH) 2 = (0.8-1.1): (0.8-1.1): (8-12) molar ratio for metering and batching, the preferred value of the molar ratio is ...

Example Embodiment

Example 3:

The waste water used was still taken from the same manufacturer as in Example 1. It was the comprehensive waste water produced by flakes (ie comprehensive flake waste water). Several solid adsorbents were compared, such as kaolin, clay, activated clay, 4A zeolite, terracotta powder, and hydroxide. The solid-liquid enrichment and separation effect of magnesium, aluminum hydroxide, etc., and the Ca-Mg-based composite flocculant prepared by the present invention. The dosage of this example 3 is added according to the principle of adsorption, so that the Ca-Mg series composite flocculant prepared by the present invention is subject to the higher dosage of solid adsorbent and longer adsorption reaction time. The rest of the implementation conditions and the measured The technical indicators are exactly the same as in Example 1.

The Ca-Mg series mixed coagulant is a stable mixed coagulant powder, which can be made from commercially available CaSO 4 ·2H 2 O, Mg(OH) 2 , Ca(...

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PUM

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Abstract

The invention relates to a solid-liquid enrichment separation method for tobacco sheet wastewater in a paper-making method. Nicotine and other components in the wastewater are enriched to a solid phase for separation, wherein the COD removal rate in single-stage separation can reach 70-80 percent; and then a biomedical forced aerobic method or anaerobic/aerobic method are adopted to treat, reuse or discharge the treated water, and the sludge solid can be reused. The solid-liquid enrichment separation method comprises the following steps: blocking slag by grilling; performing coagulation and enrichment reaction; settling; performing subsequent treatment clear water on an upper layer; concentrating sludge solid, and other steps. The solid-liquid enrichment separation method has the advantages that: the prepared calcium-magnesium compound coagulants are easily prepared and can be prepared into quality-grading formulations aiming at fluctuation of the wastewater; the obtained sludge solidobtained by separation is rich in nicotine and other components which can be subsequently extracted as active ingredients of biogenic pesticides; the extracted dry soil powder can be totally used as loading agents of powder pesticides; and special treatment facilities and equipment are unnecessarily used, and the investment and operating cost of biochemical facilities can be reduced simultaneously.

Description

technical field The invention belongs to the technical field of high-concentration industrial wastewater treatment and sludge solid reuse, and in particular relates to a solid-liquid enrichment and separation method for papermaking tobacco sheet wastewater. Background technique The papermaking method is used to produce tobacco flakes, which are then shredded and added to cigarettes, so that wastes such as tobacco powder and tobacco stems in cigarette production can be fully utilized. It has been widely adopted abroad, and large-scale production has also been formed in many places in my country. Tobacco flake waste water produced by papermaking method has a COD of 10000-12000mg / L and contains a large amount of suspended solids, the suspended solids are mainly tobacco leaf fine powder, short fine cellulose powder, fine lignin and fine smoke Stem mince and so on. At present, the wastewater treatment method is to disintegrate all wastes by physicochemical biochemical digestion ...

Claims

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Application Information

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IPC IPC(8): A24B3/14A24B15/18C02F9/14C02F11/12C02F1/52
Inventor 王云祥余进吴四和孙家寿熊星
Owner WUHAN TEXTILE UNIV
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