Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, Quebec J1M 0C8, Canada.
Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, Quebec J1M 0C8, Canada.
Bioresour Technol. 2015;187:128-135. doi: 10.1016/j.biortech.2015.03.110. Epub 2015 Mar 28.
Novel high rate psychrophilic (20°C) anaerobic digestion (PAD) of undiluted cow feces (11.5-13.5% total solids) was demonstrated using sequence batch reactor in long-term operation with successive cycles of 21days treatment cycle length (TCL). At organic loading rates (OLR) 9.0, 10.0, 11.0 and 12.0g TCOD kg(-1) inoculum d(-1) average specific methane yield (SMY) was 154.0±11.7, 152.1±12.2, 126.0±2.8 and 116.0±6.1NL CH4 per kg of VS fed, respectively. Volatile solids removal averaged around 31.7±3.3%, 32.2±1.0%, 27.9±2.2% and 23.4±0.5%, respectively. Substrate-to-inoculum ratio (SIR; wet-mass basis) ranged between 1.17±0.06 and 1.43±0.05. Concentration of volatile fatty acids in the bioreactors during the TCL indicated that hydrolysis was the rate limiting reaction. High rate PAD of undiluted cow feces is possible at OLR (g TCOD kg(-1) inoculum d(-1)) 9.0 and 10.0 with a TCL of 21days; however, OLR of 11.0 and 12.0 are also possible but require longer TCL to maintain the SMY.
新型嗜冷（20°C）厌氧消化（PAD）在长周期运行中，利用序批式反应器对未经稀释的牛粪（总固体含量 11.5-13.5%）进行连续 21 天的处理周期（TCL）。在有机负荷率（OLR）为 9.0、10.0、11.0 和 12.0g TCOD kg（-1）接种物 d（-1）时，平均比甲烷产量（SMY）分别为 154.0±11.7、152.1±12.2、126.0±2.8 和 116.0±6.1NL CH4/kg 进料 VS。挥发性固体去除率平均约为 31.7±3.3%、32.2±1.0%、27.9±2.2%和 23.4±0.5%。底物-接种物比（SIR；湿基）在 1.17±0.06 和 1.43±0.05 之间变化。TCL 期间生物反应器中的挥发性脂肪酸浓度表明水解是限速反应。在 OLR（g TCOD kg（-1）接种物 d（-1））为 9.0 和 10.0 时，未经稀释的牛粪的高率 PAD 是可行的，TCL 为 21 天；然而，OLR 为 11.0 和 12.0 也是可行的，但需要更长的 TCL 来维持 SMY。
