Study on the stability of anaerobic digestion of food waste and the waste mushroom substrate based on SBR reactor and Netlogo simulation

• Published in: Journal of material cycles and waste management 2023-03, Vol.25 (2), p.793-809
• Main Authors: Gu, Huisong, Feng, Lei, Zhen, Xiaofei
• Format: Article
• Language: English
• Subjects: Ammonia; Anaerobic digestion; Biogas; Chemical oxygen demand; Civil Engineering; Engineering; Environmental Management; Fatty acids; Fermentation; Food; Food waste; Gas production; Microorganisms; Mixing ratio; Mushrooms; Oil and gas production; Original Article; Parameters; Simulation; Substrates; Volatile fatty acids; Waste Management/Waste Technology
• ISSN: 1438-4957; 1611-8227
• DOI: 10.1007/s10163-022-01559-7

The combined anaerobic fermentation experiment of the waste mushroom substrate and food waste was carried out at 37 ± 1℃ in this study, and the gas production, pH, soluble chemical oxygen demand concentration, ammonia nitrogen concentration, total volatile fatty acids concentration, main hydrolase activities and other parameters were measured within 60 days. The results showed that when the mixing ratio of the waste mushroom substrate and food waste was 1:1, the anaerobic fermentation gas production was the highest (10628 mL), which was 43.4% and 31.9% higher than that of pure waste mushroom substrate and food waste, respectively. The gas production stage lasted for up to 30 days, and the system could run stably without artificial regulation. Netlogo simulation was used to verify that changing the nutrient structure of fermentation substrate could keep the number of microorganisms at a high level for a long time. This study provides the material ratio and corresponding anaerobic fermentation reaction parameters for large-scale biogas engineering, and conducts NETLOGO simulation to explore the influence rule of material ratio on gas production, which can avoid some problems in practical engineering.