Volume 3, Issue 2, June 2018, Page: 32-39
A Review on the Research of Promoting Biogas Fermentation Efficiency by Mixing
Ruyi Huang, Biogas Institute of Ministry of Agriculture & Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu, China; College of Architecture and Environment, Sichuan University, Chengdu, China; Rural Energy Office of Sichuan Province, Chengdu, China
Zili Mei, Biogas Institute of Ministry of Agriculture & Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu, China
Jiang Li, Biogas Institute of Ministry of Agriculture & Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu, China
Enshen Long, College of Architecture and Environment, Sichuan University, Chengdu, China
Ting Guo, Rural Energy Office of Sichuan Province, Chengdu, China
Tao Luo, Biogas Institute of Ministry of Agriculture & Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu, China; College of Architecture and Environment, Sichuan University, Chengdu, China
Yan Long, Biogas Institute of Ministry of Agriculture & Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu, China
Received: Aug. 6, 2018;       Accepted: Sep. 1, 2018;       Published: Oct. 8, 2018
DOI: 10.11648/j.jeece.20180302.13      View  1108      Downloads  104
Mixed agitation can significantly improve the efficiency of anaerobic fermentation, which is shown by the remarkable improvement of biogas production and pollutant removal rate, so it has become an indispensable auxiliary process in modern biogas engineering. However, the internal mechanism of how agitation improves the fermentation efficiency is not clear, so it is difficult to find the best agitation form under complex conditions. However, in recent years, more research results have been obtained in this field. The effects of various agitation forms have been continuously verified on different feedstock characteristics under different fermentation and operating conditions, and the mechanism has been gradually clarified. The most important achievement is that in the 1990s it was clear that continuous agitation would impact the fermentation system, so batch agitation is the correct way to improve the fermentation efficiency. Since the 21st century, the latest research has focused on setting the operating parameters of batch agitation. Researchers have made greatly progress in all the aspects of medium, mode, power, speed and duration of agitation, and optimized the mixing scheme. Some studies have also revealed that stirring will affect the temperature field, impurity removal, toxicity accumulation and so on, and the optimal design of mixing scheme should take into account the comprehensive effects of all aspects. In this paper, the main worldwide research achievements in this field made in recent years are reviewed, and the internal mechanism that agitation can improve the anaerobic fermentation efficiency of biogas is clarified to a certain extent, and the suitable agitation forms under certain conditions are suggested.
Biogas, Fermentation Efficiency, Mixing, Agitation, Flow Pattern
To cite this article
Ruyi Huang, Zili Mei, Jiang Li, Enshen Long, Ting Guo, Tao Luo, Yan Long, A Review on the Research of Promoting Biogas Fermentation Efficiency by Mixing, Journal of Energy, Environmental & Chemical Engineering. Vol. 3, No. 2, 2018, pp. 32-39. doi: 10.11648/j.jeece.20180302.13
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