title: Effects of inoculum to substrate ratio and co-digestion with bagasse on biogas production of fish waste.
abstract: To overcome the biogas inhibition in anaerobic digestion of fish waste (FW), effects of inoculum to substrate ratio (I/S, based on VS) and co-digestion with bagasse on biogas production of FW were studied in batch reactors. I/S value was from 0.95 to 2.55, bagasse content in co-digestion (based on VS) was 25%, 50% and 75%. The highest biogas yield (433.4 mL/gVS) with 73.34% methane content was obtained at an I/S value of 2.19 in mono-digestion of FW; the biogas production was inhibited and the methane content was below 70% when I/S was below 1.5. Co-digestion of FW and bagasse could improve the stability and biogas potential, also reducing the time required to obtain 70% of the total biogas production, although the total biogas yield and methane content decreased with the increase in bagasse content in co-digestion. Biogas yield of 409.5 mL/gVS was obtained in co-digestion of 75% FW and 25% bagasse; simultaneously 78.46% of the total biogas production was achieved after 10 days of digestion.
authors.affiliation: a College of Biosystems Engineering and Food Science , Zhejiang University , Hangzhou , People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Xu
authors.affiliation: a College of Biosystems Engineering and Food Science , Zhejiang University , Hangzhou , People's Republic of China.
authors.forename: Ahmed M
authors.initials: AM
authors.lastname: Mustafa
authors.affiliation: a College of Biosystems Engineering and Food Science , Zhejiang University , Hangzhou , People's Republic of China.
authors.forename: Kuichuan
authors.initials: K
authors.lastname: Sheng
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D002482:Cellulose; D005399:Fishes; D008697:Methane; D018508:Water Purification
chemical_list: D056804:Biofuels; D002482:Cellulose; C027433:bagasse; D008697:Methane
keywords: Fish waste; VFA inhibition; bagasse; co-digestion; inoculum to substrate ratio