Department of Environmental Engineering, Tsinghua University, Beijing 100084, PR China.
J Environ Manage. 2013 Sep 30;127:18-22. doi: 10.1016/j.jenvman.2013.04.026. Epub 2013 May 10.
Most of Chinese middle size agricultural biogas plants run at the lower range of mesophilic conditions and low organic loading rates (OLRs) which result in the low biogas production. How to obtain an economically viable operation mode is a challenge for Chinese farm biogas plants. In this study, the performance of completely stirred anaerobic reactors treating pig manure was studied at 20, 28 and 38 °C. A thermal mathematic model was accordingly developed to decide the optimum digesting temperature and OLRs considering ambient temperature of 20, 10 and 0 °C. The regression surface model can fit well on the experimental data when the ambient temperature was around 10-20 °C, at which maximum net energy production (Np,max) can be achieved when the digesters run at OLR of 4.6-5.4 kgODM/m(3) d with temperature of above 26 °C. Co-digestion on the pig farm was suggested in winter in order to increase the Np.
大多数中国中型农业沼气工程运行在中温范围和低有机负荷率（OLR）下，导致沼气产量低。如何获得经济可行的运行模式是中国农场沼气工程面临的挑战。在这项研究中，研究了在 20、28 和 38°C 下完全搅拌厌氧反应器处理猪粪的性能。相应地开发了一个热数学模型，以考虑 20、10 和 0°C 的环境温度来确定最佳消化温度和 OLR。当环境温度在 10-20°C 左右时，回归曲面模型可以很好地拟合实验数据，在此温度范围内，当消化器在 OLR 为 4.6-5.4kgODM/m(3)d 且温度高于 26°C 时，可以实现最大净能量产率（Np,max）。建议在冬季进行猪场的共消化，以增加 Np。
