65
© The Author(s) 2020
M. Gummert et al. (eds.), Sustainable Rice Straw Management,
https://doi.org/10.1007/978-3-030-32373-8_5
Chapter 5
Anaerobic Digestion of Rice Straw
for Biogas Production
Nguyen Vo Chau Ngan, Francis Mervin S. Chan, Tran Sy Nam,
Huynh Van Thao, Monet Concepcion Maguyon-Detras,
Dinh Vuong Hung, Do Minh Cuong, and Nguyen Van Hung
Abstract Anaerobic digestion (AD) is a process of degradation of organic matter
by microorganisms in an oxygen-free environment, which produces biogas, a vital
renewable energy source. Using solely an organic source, such as monosubstrates,
it is difficult to optimize the AD process due to nutrient imbalance, lack of appropriate microbial communities, and the effect of operational parameters. This chapter
reviews the current studies on biogas production from the anaerobic codigestion
process of mixing agricultural byproducts, focusing on rice straw and livestock
manure as substrates. Because rice straw is high in cellulose, it needs to be pretreated before feeding into the anaerobic digester. Different rice straw pretreatments
are summarized including physical, chemical, and biological methods. Current biogas systems are discussed. The utilization of bioslurry from the anaerobic fermentation process to agricultural cultivation and aquaculture activities is also discussed.
Keywords Anaerobic digestion · Biogas · Co-digestion · Pre-treatment · Rice
straw
N. V. C. Ngan (*) · T. S. Nam · H. Van Thao
Can Tho University, Can Tho, Vietnam
e-mail: nvcngan@ctu.edu.vn; tsnam@ctu.edu.vn; hvthao@ctu.edu.vn
F. M. S. Chan
University of the Philippines Los Baños, Los Baños, Philippines
e-mail: f.chan@irri.org
M. C. Maguyon-Detras
Department of Chemical Engineering, College of Engineering
and Agro-Industrial Technology, University of the Philippines Los Baños (UPLB),
Los Baños, Laguna, Philippines
e-mail: mmdetras@up.edu.ph
D. V. Hung · D. M. Cuong
Hue University, Hue, Vietnam
e-mail: dominhcuong@huaf.edu.vn
N. V. Hung
International Rice Research Institute (IRRI), Los Baños, Laguna, Philippines
e-mail: hung.nguyen@irri.org
© The Author(s) 2020
M. Gummert et al. (eds.), Sustainable Rice Straw Management,
https://doi.org/10.1007/978-3-030-32373-8_5
Chapter 5
Anaerobic Digestion of Rice Straw
for Biogas Production
Nguyen Vo Chau Ngan, Francis Mervin S. Chan, Tran Sy Nam,
Huynh Van Thao, Monet Concepcion Maguyon-Detras,
Dinh Vuong Hung, Do Minh Cuong, and Nguyen Van Hung
Abstract Anaerobic digestion (AD) is a process of degradation of organic matter
by microorganisms in an oxygen-free environment, which produces biogas, a vital
renewable energy source. Using solely an organic source, such as monosubstrates,
it is difficult to optimize the AD process due to nutrient imbalance, lack of appropriate microbial communities, and the effect of operational parameters. This chapter
reviews the current studies on biogas production from the anaerobic codigestion
process of mixing agricultural byproducts, focusing on rice straw and livestock
manure as substrates. Because rice straw is high in cellulose, it needs to be pretreated before feeding into the anaerobic digester. Different rice straw pretreatments
are summarized including physical, chemical, and biological methods. Current biogas systems are discussed. The utilization of bioslurry from the anaerobic fermentation process to agricultural cultivation and aquaculture activities is also discussed.
Keywords Anaerobic digestion · Biogas · Co-digestion · Pre-treatment · Rice
straw
N. V. C. Ngan (*) · T. S. Nam · H. Van Thao
Can Tho University, Can Tho, Vietnam
e-mail: nvcngan@ctu.edu.vn; tsnam@ctu.edu.vn; hvthao@ctu.edu.vn
F. M. S. Chan
University of the Philippines Los Baños, Los Baños, Philippines
e-mail: f.chan@irri.org
M. C. Maguyon-Detras
Department of Chemical Engineering, College of Engineering
and Agro-Industrial Technology, University of the Philippines Los Baños (UPLB),
Los Baños, Laguna, Philippines
e-mail: mmdetras@up.edu.ph
D. V. Hung · D. M. Cuong
Hue University, Hue, Vietnam
e-mail: dominhcuong@huaf.edu.vn
N. V. Hung
International Rice Research Institute (IRRI), Los Baños, Laguna, Philippines
e-mail: hung.nguyen@irri.org