WO2012019420A1 - Method for improving tobacco stem quality through combing steam explosion and enzyme treatment technology - Google Patents

Abstract

A method for improving tobacco stem quality through combining steam explosion and enzyme treatment technology is provided. The method includes the following steps: a) steam exploding tobacco stem with a steam explosion machine, b) adding lignin enzyme and cellulose enzyme into the exploded tobacco stem, c) processing the tobacco stem into which the enzyme is added under condition of constant temperature and humidity, the temperature being 30-35℃ and the relative humidity being 90%, d) processing the tobacco stem treated by enzyme with low temperature dehydration drying treatment to control the moisture rate at about 20-30%, e) shredding the dewatered tobacco stem for cigarette production. The method improves the quality of tobacco stem by reducing lignin and cellulose, increases adding proportion of tobacco stem in the cigarette and reduces production cost of cigarette.

Description

 Description of the method for improving the quality of tobacco stems by combining steam explosion with enzyme treatment technology

 The invention relates to a method for improving the quality of tobacco stems by combining steam explosion with enzyme treatment technology, and belongs to the field of tobacco processing. Background technique

 Tobacco stems are an important part of tobacco leaves and generally account for about 1/4 of the quality of whole tobacco leaves. The cell wall material content of cellulose, hemicellulose, lignin and pectin in the stem is about 43.8% of the dry matter mass. High content of cellulose, hemicellulose, lignin and pectin, resulting in strong irritant stems, heavy gas, odor, cough, gargle, less aroma, restricting the cut stem in the cigarette formula Use ratio.

 Summary of the invention

 It is an object of the present invention to provide a method for improving the quality of tobacco stems by combining steam explosion with enzyme treatment techniques to improve the quality of tobacco stems.

 The object of the present invention is achieved by a method for improving the quality of tobacco stems by combining steam explosion with enzyme treatment technology, which can combine steam explosion with enzyme treatment technology for treating tobacco stems and improving tobacco use for tobacco stems. Quality, the method includes the following steps:

 a), using a steam blasting machine to steam blast the wetted stem;

 b) adding ligninase and cellulase to the blasted stem;

 c), the added tobacco stems are treated under constant temperature and constant humidity conditions, and the treatment temperature is maintained at 30 to 35. C, relative humidity is 90%;

 d), after the enzyme treatment, the stem is subjected to low-temperature dehydration and drying treatment, so that the water content is controlled to be about 20~30%;

 e) Finally, the dehydrated stems are subjected to shredding for cigarette production.

 The above steam blasting method is: using saturated steam as a working medium, and fully blasting the stem by adjusting the saturated steam pressure and the pressure action time.

 The steam explosion pressure is 0. 8~1. OMPa, the steam holding time is 20~40 seconds.

In the above step c, the treatment temperature is 35 ° C, and the relative humidity is 90%; in the d step, the suspension drying is used for dehydration treatment, so that the water content is maintained at about 30%. The basic guarantee for realizing the method is to first perform steam explosion on the tobacco stem, and then carry out enzymatic treatment on the tobacco stem after the explosion, and the constant temperature and constant humidity conditions in the enzyme treatment process can improve the treatment effect.

 The beneficial effects of the invention are that - steam explosion is the use of high pressure steam to infiltrate between the cellulose and lignin macromolecules in the structure of the stem, and the instantaneous release of high pressure steam between the tissues is realized by the rapid pressure loss outside the stem. The stalk is broken to promote the separation of the lignocellulosic structure, which makes the structure of the stem after fluffing fluffy, which is beneficial to the osmotic activity of ligninase and cellulase during the subsequent enzyme treatment, and strengthens the enzyme treatment effect. At the same time, the high pressure and high temperature environment of steam explosion can also Effectively realize the conversion of cellulose, semi-fibres and pectin in tobacco stems, and improve the reducing sugar content in the stems.

 The use of ligninase and cellulase to treat the stems after steam explosion can further reduce the lignin and cellulose in the stems, reduce the content of lignin and cellulose in the stems, and reduce the stems. Woody gas and coughing caused by lignin and cellulose.

 The combination of steam explosion and enzyme treatment to treat tobacco stems can effectively improve the quality of tobacco stems and increase the amount of tobacco stems added in cigarette production, which is of great significance for reducing cigarette production costs.

 detailed description

 Preparation examples:

Take 5k _g of tobacco stems after normal treatment such as quenching and tempering, alcoholization, use water to quickly rinse off surface adhesion dust, and remove surface moisture by air; use steam blasting machine to blast the stems with surface moisture removal, blasting working medium The saturated water vapor has a bursting pressure of 0.8 MPa and a pressure retention time of 20 seconds. After the steam blasting of the stems, they are dehydrated and dried by suspension blast drying to keep the water content at about 30%. The ligninase and cellulase were activated and added to the stalk treatment. The temperature of the storage device was set to 35 ° C, the relative humidity was set to 90%, and the treatment was protected from light for 12 to 24 hours. After the enzyme treatment, the stems are dried by the enzyme-killing, and the shreds are processed according to the cigarette formula, and the amount of cut stems can be increased by more than 5%. Sensory evaluation showed that the sensory quality of the cut tobacco after steam blasting and enzyme treatment was increased by 5%, and the sensory quality of the cigarette was consistent with the original formula.

 In this paper, the steam pressure is gauge pressure.

Claims

Claim 1. A method for improving the quality of tobacco stems by combining steam explosion with enzyme treatment technology, characterized in that steam explosion and enzyme treatment technology can be combined for treating tobacco stems, and the quality of tobacco stems is improved. The method comprises the following steps - a), using a steam blasting machine to steam blast the wetted tobacco stem;  b) adding ligninase and cellulase to the blasted stem;  c), the added tobacco stems are treated under constant temperature and constant humidity conditions, maintaining a treatment temperature of 30 to 35, and a relative humidity of 90%;  d), after the enzyme treatment, the stem is subjected to low-temperature dehydration and drying treatment, so that the water content is controlled to be 20~30%;  e) Finally, the dehydrated stems are subjected to shredding for cigarette production.  2. The method for improving the quality of a tobacco stem according to claim 1, wherein: the steam explosion method is: using saturated steam as a working medium, and fully blasting the tobacco stem by adjusting a saturated steam pressure and a pressure action time. .  The method for improving the quality of the tobacco stem according to claim 2, wherein: the steam explosion pressure is 0. 8~L OMPa, and the steam holding time is 20 to 40 seconds.  4. The method for improving the quality of tobacco stems according to claim 3, wherein: the processing temperature in the step c is 35 ° C, and the relative humidity is 90%; and the d step is performed by using a suspension type drying method for dehydration treatment. , keep its water content at around 30%.