Improvement of Alcohol Mash Technology from Starch-containing Raw Materials
Students Name: Andrushko Viktoriia Orestivna
Qualification Level: magister
Speciality: Fermentation Products and Wine-making Technologies
Institute: Institute of Chemistry and Chemical Technologies
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: англійська
Abstract: Andrushko V. O., Palianytsia L. Ia. (supervisor). Improvement of Alcohol Mash Technology from Starch-containing Raw Materials. Master`s thesis. – Lviv Polytechnic National University, Lviv, 2020. Extended annotation. The introduction of innovations in alcohol technology in connection with the popularization and need to find alternative sources of starch-containing raw materials to improve the state of ecological systems is relevant [1, 2]. Modern research is aimed at using technologies that make it possible to intensify and, accordingly, reduce the duration of technological processes. One of the directions of development of the alcohol industry is the disposal of by-products and waste enriched with sugars or starch. In accordance with this, the master’s qualification work contains the following innovative solutions. First, it is proposed to use highly active enzyme preparations at the stage of thermoenzymatic processing of starch – containing raw materials, and thermotolerant yeast strains at the fermentation stage in order to reduce the duration of fermentation. Secondly, it is proposed to add potato skins to the grain batch. This waste was chosen as an alternative raw material, taking into account the large scale of potato production in Ukraine, as well as in order to improve the ecological state of Ukraine by reducing the amount of waste and the possibility of their processing. In addition, the use of potato peels can partially replace the shortage of grain crops in adverse weather conditions on the territory of Ukraine, and, accordingly, an increase in prices for their purchase. Consequently, the proposed raw materials can provide more stable conditions for alcohol production in terms of reducing the cost of purchasing grain [3-4]. The object of research - is the technology of alcohol from starch containing raw materials. The subject of the research - is a method for improving the technology of alcohol mash from starch – containing raw materials. The purpose of the master’s qualification work - is to improve the technology of alcohol mash from starch – containing raw materials, choose a modern hardware and technological scheme, search for possible innovations and improvements to increase the efficiency of alcohol production, save energy and material resources. Research results. The paper develops an improved technological scheme for obtaining alcohol mash from wheat and potato peels as an additional raw material. The following enzyme preparations are proposed for the preparation of kneading and wort: Amylex 3T (source of ?-amylase), Diazyme X4 (source of glucoamylase), Celluclast 1.5 L (source of cellulase). The use of a cellulase enzyme preparation promotes the breakdown of non – starchy polysaccharide-cellulose contained in potato peels (about 30%)[1]. For the fermentation process, thermosacc thermosable yeast is proposed, having a higher fermentation temperature, namely 35 °C, while the typical technology provides for a temperature of up to 30 °C. the technological scheme provides for the use of a yeast suspension separator, due to which the duration of yeast preparation for fermentation is reduced, since separation provides yeast reutilization, and the process of cleaning the yeast and preparing for reuse requires less time than full-fledged yeast generation. The paper calculates the consumption coefficients of alcohol production with a capacity of 2800 Dal/day. The use of enzyme preparations and thermotolerant yeast reduces the duration of processes and saves 0.18 kg of acute steam and 0.99 kg of water for the production of 1 Dal of alcohol. In accordance with the improved technology, technological equipment was selected and its design calculation was carried out. Economic efficiency is also calculated, and production costs and profitability are determined. Key words - alcohol technology, potato peels, mash, enzymes, yeast, economic efficiency.