College of Engineering, Northeast Agricultural University, Harbin 150030, China; College of Architecture and Civil Engineering, Northeast Petroleum University, Daqing 163318, China.
College of Engineering, Northeast Agricultural University, Harbin 150030, China.
Waste Manag. 2019 Apr 15;89:303-312. doi: 10.1016/j.wasman.2019.04.027.
Energy utilization efficiency of heating for the operation process of biogas reactor is an important factor limiting its development and popularization. A novel mode of solar radiant heating combined with the conventional heating mode was proposed to reduce the power loss and improve the utilization cycle of heat exchanger. In present work, experimental and numerical researches about the anaerobic fermentation process under two heating modes were made to investigate the effect of temperature fluctuation on non-isothermal fermentation process under solar radiant heating. The results show that the methane production capacity of non-isothermal process under solar radiant heating reduces by up to 14% compared with the constant temperature condition in three seasons; increasing the total solid concentration of bioreactor is helpful for improving the effect of solar radiant heating; the effects of temperature fluctuation coefficient on acid and methane productions are bigger than the one on pH of slurry.
沼气反应器运行过程中的供热能耗效率是限制其发展和推广的一个重要因素。为了降低功率损耗，提高换热器的热利用周期，提出了一种新型的太阳能辐射加热与传统加热方式相结合的模式。本工作通过实验和数值研究两种加热模式下的厌氧发酵过程，研究了温度波动对太阳能辐射加热下非恒温发酵过程的影响。结果表明，与恒温条件相比，太阳能辐射加热下的非恒温过程的甲烷产量在三个季节中最多减少了 14%；增加生物反应器的总固体浓度有助于提高太阳能辐射加热的效果；温度波动系数对酸和甲烷产量的影响大于对浆液 pH 值的影响。
