Author(s):
1. Vladan Mićić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
2. Sanja Jezdić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
3. Pero Dugić, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
4. Sabina Begić, Faculty of Technology, University of Tuzla, Federation of Bosnia and Herzegovina , Bosnia and Herzegovina

Abstract:
quid stillage is waste water obtained in the bioethanol production in an amount of about 13 liters per 1 liter of the produced bioethanol. The most of plants for the bioethanol production are not adequate treated liquid stillage. This is a significant environmental problem, since its BPK5 values is from 15 to 340 g/L. In the according to its physical, chemical and nutritional characteristics, the liquid stillage is a suitable substrate for the growth of lactic acid bacteria which are the mostly used in the fermentative production of lactic acid at this moment. Lactic acid is an important substance for the food, pharmaceutical and chemical industry and because using distillatory stillage as a cheap substrate in its production is of great importance. The primary purpose of this paper is to investigate the possibilities of production of lactic acid on distillery stillage obtained in bioethanol production. Using waste distillatory stillage as a raw material for the production of lactic acid does not increase the concentration of carbon dioxide in the atmosphere. Because this does not contribute to the greenhouse effect and global warming. At the same time with this technological process the problem of disposal and destruction of by-products which are harmful to the environment is solved.

Key words:
lactic acid, lactic acid fermentation, distillery stillage, bioethanol.

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
23.06.2015.

Conference:
Contemporary Materials 2015 - Savremeni Materijali

Abstract