Comparative study on effect of shredding and extrusion on biogas production from cauliflower and banana peduncle wastes

authored by: Velusamy Mozhiarasi, Pious Michealammal Benish Rose, Dirk Weichgrebe, Shanmugham Venkatachalam Srinivasan
Abstract: India is one of the largest cultivators of banana and cauliflower crops in the world. However, these crops generate huge amounts of wastes whose disposal in an eco-benign way has become a challenging issue. Banana peduncle and cauliflower wastes are promising substrates for bioenergy production through anaerobic digestion (AD). In this present study, shredding and extrusion pretreatment were applied to increase biogas production from banana and cauliflower wastes and the results were compared. Batch anaerobic digestion tests were carried out in 1-L batch AD reactors at a temperature of 37 °C with a substrate to inoculum ratio of 0.5, by following VDI 4630 standards. AD of the extruded cauliflower waste showed a maximum specific biogas yield (SBY) of 587.4 mL/g volatile solids (VS) added, which is 9.8% higher than shredded cauliflower waste (with SBY of 534.7 mL/g VS added). Similarly, AD of the extruded banana peduncle revealed a maximum SBY of 399.2 mL/g VS added, which is 16.5% higher than shredded banana peduncle (with SBY of 342.5 mL/g VS added). The modified Gompertz and logistic kinetic models showed the best fit for biogas production. Thus, it is concluded that the anaerobic digestion of wastes with extrusion as pretreatment could improve biogas production and solid waste management effectively and reduce the waste disposed into dumpsites/landfills. Graphical abstract: [Figure not available: see fulltext.]
Organisation(s): Institute of Sanitary Engineering and Waste Management
External Organisation(s): Central Leather Research Institute
Type: Article
Journal: Environment, Development and Sustainability
ISSN: 1387-585X
Publication date: 14.11.2023
Publication status: E-pub ahead of print
Peer reviewed: Yes
ASJC Scopus subject areas: Geography, Planning and Development, Economics and Econometrics, Management, Monitoring, Policy and Law
Sustainable Development Goals: SDG 12 - Responsible Consumption and Production, SDG 13 - Climate Action
Electronic version(s): https://doi.org/10.1007/s10668-023-03990-8 (Access: Closed)