Recovery method for aroma components in papermaking wastewater, intercepted concentrated solution formed after implementation of recovery method and application of intercepted concentrated solution

Abstract

The invention provides a recovery method for aroma components in papermaking wastewater, an intercepted concentrated solution formed after implementation of the recovery method and application of theintercepted concentrated solution. The recovery method comprises the following steps: 1) filtering papermaking wastewater formed in a production process of reconstituted tobacco to obtain a first filtrate; 2) carrying out flocculating settling on the first filtrate to obtain a flocculating settling supernatant and a flocculating constituent, and carrying out centrifugal filtration on the flocculating constituent to obtain a second filtrate; 3) combining the second filtrate with the flocculating settling supernatant, and then conducting filtering by using a ceramic microfiltration membrane so as to obtain a microfiltration filtrate; 4) performing ultrafiltration on the microfiltration filtrate to obtain an ultrafiltration filtrate; and 5) performing reverse osmosis filtration and concentration on the ultra-filtration filtrate to obtain the intercepted concentrated solution containing the aroma components of tobacco. According to the recovery method, comprehensive treatment of the papermaking wastewater of the reconstituted tobacco and recycling of the aroma components are achieved; and the method is simple and easy to implement, and environmental pollution cannot be caused.

Description

technical field [0001] The invention relates to the field of reconstituted tobacco leaves, in particular to a method for recovering aroma components in papermaking wastewater in reconstituted tobacco leaves. Background technique [0002] Reconstituted tobacco leaves are made from defective tobacco leaves and waste products in cigarette production, and their properties are close to natural tobacco leaves. [0003] The papermaking method is the mainstream production method in the current industrial production of reconstituted tobacco leaves. The production process adopts the leaching method to extract the active ingredients in the tobacco material, such as nicotine, sugar, flavor substances, etc. The reconstituted tobacco leaves are produced by leaching solid slag and cardboard pulping and papermaking. The leaching of solid slag, pulping and papermaking produces a large amount of papermaking wastewater, which contains more suspended solids, colloids and dissolved organic matt...

AI Technical Summary

Problems solved by technology

Judging from the existing reports of "treatment methods for papermaking wastewater in reconstituted tobacco leaf production", the traditional treatment method for papermaking wastewater in the paper industry is to remove or degrade solid suspended matter, colloids, and dissolved organic matter; membrane separation method is used to treat papermaking wastewater The ultrafiltration membrane used in the method can effectively remove macromolecular organic matter, but the interception and removal effect on small and medium molecular weight organic matter is not ideal, and the existing methods do not consider the recovery and utilization of aroma components in reconstituted tobacco leaves

At present, it has been proved that the leached solid residue contains a large amount of tobacco aroma components that cannot be leached in the extraction process. Since the production of reconstituted tobacco leaves uses the leached solid residue and cardboard beating to make paper, the white water in the beating process also contains a large amount of tobacco aroma components. These tobacco aroma components enter the papermaking wastewater during papermaking in the papermaking process. The existing "reconstituted tobacco leaf papermaking wastewater treatment method" fails to recycle these tobacco aroma components, resulting in waste of resources

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