Optimizing hydraulic retention time for methane production from the hydrogenic effluent left over from the co-digestion of vinasse and spent brewer's yeast cell
Issued Date
2025-01-01
Resource Type
eISSN
25889133
Scopus ID
2-s2.0-105002790573
Journal Title
Carbon Resources Conversion
Rights Holder(s)
SCOPUS
Bibliographic Citation
Carbon Resources Conversion (2025)
Suggested Citation
Nualsri C., Sreela-or C., Tharangsri P., Wongarmat W., Reungsang A., Sittijunda S. Optimizing hydraulic retention time for methane production from the hydrogenic effluent left over from the co-digestion of vinasse and spent brewer's yeast cell. Carbon Resources Conversion (2025). doi:10.1016/j.crcon.2025.100328 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/109750
Title
Optimizing hydraulic retention time for methane production from the hydrogenic effluent left over from the co-digestion of vinasse and spent brewer's yeast cell
Corresponding Author(s)
Other Contributor(s)
Abstract
This study aims to optimize the hydraulic retention time (HRT) for the methane production from hydrogenic effluent derived from the co-digestion of vinasse and spent brewer's yeast cells. The experiments were conducted in a continuous stirred tank reactor (CSTR) at various HRTs ranging from 60 to 5 days. The results showed that optimal performance was achieved at HRT 10 days. Under this HRT, yielding a maximum methane production rate of 853.6 mL/L·d and a methane yield of 304.9 mL/g-VS, with a COD removal efficiency of 53.86 %. The microbial community analysis revealed distinct patterns across different HRTs, with shorter HRTs (5–15 days) dominated by Bathyarchaeia-related taxa and Thermoplasmatota, while longer HRTs (30–60 days) showed the predominance of traditional methanogenic archaea within the Euryarchaeota phylum. The methane production process involved both acetoclastic and hydrogenotrophic pathways, with enhanced efficiency observed under shorter HRTs where both pathways coexisted. The greenhouse gas reduction potential analysis revealed that implementing this process could potentially reduce emissions by 1,026,206 tCO2eq/year through the substitution of fossil fuel-based electricity with methane-derived power.