Challenges in bioethanol production from intermediate and by-products of the sugar beet processing in the Republic of Serbia

Abstract

The bioethanol market is large and has a constant upward trend, which requires the improvement of its production. In the Republic of Serbia, bioethanol is produced using sugar beet molasses-based media. Taking into account a few disadvantages of molasses as raw material, as well as a decreasing trend in its use in Serbia, it is necessary to consider other possibilities provided by the sugar beet processing technology. Therefore, the cogeneration of sugar and bioethanol may serve as an alternative and viable solution. In this paper, the data on the characteristics of intermediate and by-products of sugar beet processing, used as raw materials for bioethanol production, are summarized. The criteria for their selection are given, and the locations of their generation are mapped. Furthermore, the current bioethanol production capacities in the Republic of Serbia are presented, and the possibility of the cogeneration of sugar and bioethanol in domestic factories is considered.

Liquid effluents of bioethanol production from various raw materials as media for xanthan biosynthesis

“…Standard methods were used to determine residual contents of the total nitrogen and phosphorus, i.e. the Kjeldahl method (Herlich, 1990) for nitrogen and the spectrophotometric method (Gales et al, 1966) for phosphorus. A conversion rate of each nutrient analyzed (%) was calculated using the following equation:…”

“…Bioethanol is predominantly produced in Serbia from sugar beet molasses and starch raw materials such as grains and potatoes (admittedly to a certain extent and in plants of smaller capacity) (Dodić et al, 2018). Based on the data of the Statistical Office of the Republic of Serbia for the period 2009-2016, the production of bioethanol in Serbia amounted to 60,000-65,000 hL per year.…”

The role of maize hybrids in current trends of bioethanol production

“…Currently, there is no organized production and consumption of bioethanol as an automotive fuel in Serbia . According to the data of the Statistical Office of the Republic of Serbia, the annual bioethanol production in the period from 2009 to 2016 was about 60,000-65,000 hl, less than half compared to the amount produced in the period 2005-2008 (about 145,000 hl per year), which indicates that part of the production capacity is currently underutilized (Dodić et al ., 2018 potential, Serbia is not producing bioethanol as an energy source . In Serbia, ethanol is produced in several plants ("Panon", Crvenka; "Ada Vrenje", Belgrade; "Lukas", Bajmok; "Reahem", Srbobran and "Alpis -SLC ", Kovin), mainly medical alcohol and for use in the pharmaceutical industry or as a disinfectant .…”

Kinetic analysis of alcoholic fermentation using intermediate and by-products of sugar beet processing in laboratory bioreactor

“…On the other hand, thin juice contains significantly lower sugar content (12-14 %), but it is also successfully used as a substrate for bioethanol production. Which substrate will be used is influenced by the time of the year and whether there is an ongoing annual campaign of sugar beet processing, when all fresh intermediate products are available, or there are only stored raw materials (Dodić et al, 2018).…”