Features of using solid cellulose-containing domestic wastes for production of bioethanol

Abstract

In this paper, we consider the process of producing biogas with a high methane content when used as a co-substrate for fermentation of plant residues of microalgae. Microalgae Chlorella sorokiniana are a valuable source for obtaining valuable components such as lipids, pigments, proteins, chlorophyll and others. After the extraction of valuable components, residual biomass is formed, which requires further disposal. In this experiment, the digestion process is carried out using an inoculant — lyophilically dried activated sludge from sewage treatment plants in Hamburg in the amount of 450 ml and residual biomass of the microalga Chlorella sorokiniana in the amount of 2.1 g. The studies were carried out in the Anaerobes Test system AMPT-II system. Fermentation produces 205 ml of methane gas.

Bioethanol production from secondary bioresources of the pulp and paper industry

“…At the second stage of research, pentose part of sugars from the acid hardwood hydrolyzate was fermented into ethanol by various strains of the xylose-assimilating yeasts. Their alcohol-forming activity was inhibited by furfural, oxymethyl furfural, and volatile organic acids to a greater extent than alcohol-forming activity of S. cerevisiae "Omskie" [22]. Therefore, pentose fraction of the hardwood hydrolyzate was prepared for microbial conversion by a modified method, which provided a deeper extraction of the indicated inhibitors (see above).…”