Ulukardesler AH. Anaerobic co-digestion of grass and cow manure: kinetic and GHG calculations.
Sci Rep 2023;
13:6320. [PMID:
37072450 PMCID:
PMC10113394 DOI:
10.1038/s41598-023-33169-0]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 04/07/2023] [Indexed: 05/03/2023] Open
Abstract
Grass is a highly desirable substrate for anaerobic digestion because of its higher biodegradability and biogas/methane yield. In this study, anaerobic co-digestion of grass, cow manure and sludge was studied under mesophilic conditions for 65 days. Experiments were performed on a feed ratio of grass/manure from 5 to 25%, respectively. The maximum cumulative biogas and methane yield was obtained as 331.75 mLbiogas/gVS and 206.64 mLCH4/gVS for 25% ratio. Also, the results of the experiments were tested on the three different kinetics model which are the first order kinetic model, modified Gompertz model and Logistics model. As a result of the study, it was found that by using grass nearly 480 × 106 kWh/year electricity may be produced and 0.5 × 106 tons/year CO2 greenhouse gas emission mitigation may be reached.
Collapse