Advancements in biodigester technology through the study of anaerobic digestion using statistical optimization and bioaccelerators

• Published in: Clean : soil, air, water air, water, 2024-02, Vol.52 (2), p.n/a
• Main Authors: Monteiro, Pablo Inocêncio, Mariano, André Bellin, Padilha, Bianca do Santos, Moraes, Yann Domingues, Zaguine, Letícia, Lopes, Leonardo Rey Oliveira, Moraes, Marcelo Lacerda, Ramos, Rúbia Martins Bernardes, Spier, Michele Rigon
• Format: Article
• Language: English
• Subjects: Alternative energy sources; Anaerobic digestion; Anaerobic processes; Anaerobic treatment; bioaccelerators; biodigesters; Biogas; biogas production; Cellulase; Dependent variables; Design; Design optimization; Digestion; Enzymes; Food waste; Independent variables; Microorganisms; Organic wastes; process optimization; Renewable energy; Sludge; Statistics; Sustainability management; Technology; Volatile solids; Waste load; Wastewater treatment plants
• ISSN: 1863-0650; 1863-0669
• DOI: 10.1002/clen.202300102

Advances in biodigester technology have been promoted by the growing study of anaerobic digestion, with the aim of improving processes related to the utilized waste load. This research used the statistical tool Central Composite Rotatable Design to optimize the combination of microorganisms and enzymes for biodigestion. The experiment involved testing two microorganisms (EA and EB) and five enzymes (amylase, protease, lipase, cellulase, and amyloglucosidase) with food waste from nearby restaurants and WWTP sludge as an inoculant. The experiment was set up as Central Composite Rotatable Design (CCRD) 26‐1, with 50 trials and a concentration of 14.5 g of volatile solids per liter. The dependent variables of cumulative biogas production (BG) and cumulative biomethane production (BM) were evaluated. The results showed that the independent variables EB and CA had negative and significant effects on BG and BM production. With optimized process conditions, the bioaccelerator significantly improved BG and BM responses compared to control trials by 72% and 88%, respectively. The biodigestion technique is a viable option for the treatment of organic waste, and the use of bioaccelerators may be a promising approach to improving biodigestion processes. This study contributes to the ongoing research on anaerobic digestion and biodigester technology, which seeks to improve the sustainable management of organic waste while producing renewable energy. In this study, biodigester technology and anaerobic digestion were employed to optimize the decomposition process of food waste. Utilizing a statistical approach, bioaccelerators were tested, and it could be shown that the tested bioaccelerators could boost biogas and biomethane volume by 72% and 88%.