Effect of bamboo hydrochar on anaerobic digestion of fish processing waste for biogas production

• Published in: Bioresource technology 2019-07, Vol.283, p.340-349
• Main Authors: Choe, Ungyong, Mustafa, Ahmed M., Lin, Hongjian, Xu, Jie, Sheng, Kuichuan
• Format: Article
• Language: English
• Subjects: Ammonium nitrogen inhibition; Bamboo hydrochar; Biogas production; COD decreasing; Fish processing waste (FWP); Methane content
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2019.03.084

•FPW mixed with pretreated bamboo hydrochar by hydrothermal for biogas production.•HTC at 200 °C and BHC ratio of 1:2 led to the highest biogas yield of 292 mL/g VS.•BHC-200(1:2) increased the methane yield, content and energy by 127%, 38%, and 82%.•HTC temperature (200–280 °C) had significant effects on methane yield and content. The effect of hydrothermal carbonization (HTC) temperature and bamboo hydrochar (BHC) addition on biogas production in anaerobic digestion of fish processing waste (FPW) was studied. HTC temperature (200–280 °C) had significant effects on methane yield and content, but the BHC had little effects. The maximum biogas yield observed with HTC at 200 °C and a BHC adding ratio of 1:2 (dry mass ratio of FPW to BHC) reached 292 L/kg volatile solids (VS), which were 64% higher than the control group with only FPW, with the maximum methane yield of 219 L/kg-VS and highest net methane energy yield of 3410 kJ/kg-VS. The obtained results can be used to design an efficient anaerobic digestion process for treating and effectively utilizing fish processing waste.