Hydrogen utilization rate: A crucial indicator for anaerobic digestion process聽evaluation and monitoring

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• 作者：Yin-ping Hou¹ ; ^{houyinpingxx@163.com" class="auth_mail} ; ^{050330204@stu.xauat.edu.cn" class="auth_mail} ; Dang-cong Peng¹ ; Xu-dong Xue² ; Hong-ye Wang¹ ; Li-ying Pei¹
• 关键词：Anaerobic digestion ; Hydrogenotrophic methanogens ; Hydrogen utilization rate ; H2 partial pressure ; Specific methanogenic activity
• 刊名：Journal of Bioscience and Bioengineering
• 出版年：April, 2014
• 年：2014
• 卷：117
• 期：4
• 页码：519-523
• 全文大小：505 K

文摘

Hydrogenotrophic methanogens had been considered as key species for the anaerobic digestion (AD) of industrial wastewater and municipal sludge. However, how to evaluate the activity of the hydrogenotrophic methanogens was less studied. In this study, a volumetric device and a test procedure were developed for measuring the specific hydrogen utilization rate (HUR) of anaerobic sludge. Results showed that HUR values were highly influenced by sludge concentrations because of limitation on H₂ mass transfer. The critical value of sludge concentration in the test bottle should not be higher than 1 gVSS/L. Under such condition, the kinetics of HUR would not be limited by H₂ mass transfer and the maximal value of HUR could be obtained. Field survey confirmed that HUR exhibits a good relationship with specific methanogenic activity (SMA) and reactor performance. An anaerobic system with a relatively high HUR was found to be beneficial for maintaining H₂ partial pressure in an appropriately low level. Moreover, such system was thermodynamically favourable for the syntrophic degradation of volatile fatty acids. As a crucial parameter of the anaerobic process, HUR could be used as a key indicator for evaluating and monitoring AD processes.