DD296100A5 - PROCESS FOR THE ENZYMATIC CONCLUSION OF STAINLESS RAW MATERIALS - Google Patents

Abstract

The invention relates to a process for the enzymatic digestion of starch-containing raw materials (cereals) in the pressureless digestion process in grain distilleries using brewing yeast. It allows a reduction of the saccharification agent in comparison to the conventional method, with comparable yields being realized {distillery; Grain commodities; Rohstoffaufschlusz; Mashing process; Special mashing process; Verzuckerungsmittel; Brauereialthefe; Enzyme potential; Liquefaction; Viskositaetserniedrigung; saccharification}

Description

Characteristic of the known state of the art

In the GDR are used as digestion process for the processing of starchy raw materials (grain) to ethanol the high-pressure steaming HDV (TGL 37792) - and the unpressurized starch digestion KMV (factory standard KSWS 01/84) - used. In addition, a modified continuous pressure digestion process, the tube digestion process RAV, is used.

As a result of the shortage of energy and raw materials, internationally diverse variants are described and practiced for the "basic methods", which either effectively exploit raw materials

- fine grinding of the raw material,

Use of effective saccharifying agents and non-amylolytic enzyme preparations,

- repatriation of vapors,

- Modified temperature control and specified enzyme inputs during raw material digestion, or energy savings by

- return of vapors

- vapor compression

- Use of heat recovery systems

to back up. In this case, in particular methods are used, which provide both raw material as well as energy benefits. The effective design of raw material digestion in the distillery through the use of yeasts is not described in the literature. In DD-PS 208371 "Process for the flavoring of beer" is described only one method for the flavoring of beer by the addition of thermally pretreated brewer's yeast to mash.

Object of the invention

The object of the invention is to reduce the use of saccharifying agents in comparison with the known starch digestion processes. This measure leads to an increase in the effectiveness of the starch digestion process as a result of the reduction of the cost per hectolitre. E. produced raw alcohol.

Explanation of the essence of the invention

The invention has for its object to be able to perform the pressureless digestion process by a broader spectrum of enzymes for the raw material digestion (starch degradation) while reducing the saccharification additive. According to the invention, this effect is achieved by the use of the enzyme potential of Brauereialthefe, which is added at the beginning of the digestion process. In addition, an improvement of the liquefaction is achieved and upgraded the substrate composition by low-molecular protein degradation products, vitamins and growth substances.

embodiments

The invention will be explained below using an exemplary embodiment. The results were achieved under farm-specific conditions. For processing rye came from the harvest in 1987. The following are used:

- rye with 53% fermentable starch,

- Alpha-Amylase Rohalase ASderFa. Röhm, Germany with 250 χ 10 ^e IE / kg,

Glucoamylase of the VEB Prowiko Schönebeck with 3 x 10 ⁶ E / l,

- Brauereialthefe, viscous (about 1 χ 10 ⁹ HZ / ml).

The raw material shredding is carried out according to the requirements of the factory standard KSWS 01/84 (KMV). Rye meal and water were added in a ratio of 1: 3. Immediately after the dough, 5% by volume of brewing yeast were added. Thereafter, the enzyme was added 180 χ 10 ⁶ IU / ton of alpha-amylase and 8 x 10 ⁶ E / t glucoamylase, Immediately thereafter, was heated to the dextrination temperature of 58 ° C and held a rest of 60 minutes.

The further processing took place according to the factory standard KSWS 01/84 (KMV). After 72 hours of fermentation at 30 ⁰ C resulted in an ethanol yield of 67, Ol r. E./dt strength.

The standardized comparison method (without brewery theory) yielded at a 25% higher alpha-amylase (225 χ 10 ⁶ IU / t strength) and a 37.5% higher Glucoamylasegabe (11 χ 10 ⁶ E / t strength) under otherwise identical technological Parameters comparable ethanol yields.

Claims (1)

Process for the enzymatic digestion of starch-containing raw materials (cereals), characterized in that brewing yeast is used in a proportion of 5-25% based on the bed charge and thereby the amylases required for enzymatic starch hydrolysis (liquefaction, saccharification) (alpha and / or To reduce glucoamylases). Field of application of the invention The invention involves the implementation of non-pressurized digestion processes in grain distilleries with reduced technical and technological effort.