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

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 ...

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 technical route, engineering scheme and process method of using the remaining dry mud powder as a pesticide load agent are not available at home and abroad. see the report