کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
765620 | 1462874 | 2014 | 9 صفحه PDF | دانلود رایگان |
• High I/S ratio (>2/1) was favorable to both sole digestion and co-digestion.
• Biogas production from BS was feasible at low temperature and low air pressure condition.
• Long SRT (>80 days) is needed for biogas production at low temperature and low air pressure condition.
• BS to manure ratio of 1/1 could increase biogas production.
• IVS removal efficiency was correlated with biogas production.
Biogas production from the co-digestion of highland barley straw (BS) with Tibet pig manure (TPM) and cow manure (CM) was investigated at Tibet plateau under low temperature (15 °C) condition. The effect of inoculum to substrate (I/S) ratio and BS to manure ratio on the biogas production was studied using a series of batch digesters performed at substrate concentration of 20%, based on total solid (TS). The results showed that biogas production from BS was feasible at low temperature and low air pressure condition. High I/S ratio (>2/1) and BS to manure ratio of 1/1 could increase the biogas production. Long solid retention time (SRT) (>80 days) was needed for biogas production at low temperature and low air pressure condition. The highest cumulative biogas production obtained from the co-digestion of BS with TPM and CM was 233.4 ml/gVS and 192.0 ml/gVS, respectively. Removal efficiencies of substrate showed that biogas production was correlated with the removal efficiency of water-insoluble volatile solids (IVS) but not with the change rate of soluble chemical oxygen demand (SCOD).
Journal: Energy Conversion and Management - Volume 88, December 2014, Pages 40–48