TY - JOUR
T1 - Enhanced carboxylic acids production by decreasing hydrogen partial pressure during acidogenic fermentation of glucose
AU - Zhou, Miaomiao
AU - Zhou, Jun
AU - Tan, Ming
AU - Du, Juan
AU - Yan, Binghua
AU - Wong, Jonathan W C
AU - Zhang, Yang
N1 - Funding Information:
The authors would like to appreciate the financial support of the Shandong Provincial Natural Science Foundation ( ZR2016bb06 ), “100 Talents Program” of Chinese Academy of Sciences (CAS) and the National Basic Research Program of China ( 2013CB733500 ).
PY - 2017/12
Y1 - 2017/12
N2 - In this study, the effect of reduced hydrogen partial pressure (PH2) on the generation of carboxylic acids from acidogenic fermentation of glucose was investigated. Three strategies were applied to reduce PH2: headspace removal (T1), CO2 sparging (T2) and H2:CO2 (80:20) sparging (T3). Results showed that the production of carboxylic acids in T1-T3 were 10.21, 11.64 and 12.71 g/L, respectively, which were 1.04, 1.19 and 1.30-fold of that in the control (T4). The composition of carboxylic acids changed significantly in T3 with enhancement of homoacetogenesis, as more acetate and butyrate were produced comparing to the control. In addition, decreasing PH2 led to more carbon flow to carboxylic acids. Species of Clostridium became dominant in treatment T3, resulting in the shift of metabolic pathways. This study demonstrated that decreasing PH2 could increase the production of carboxylic acids, especially under the strategy of enhancing homoacetogenesis.
AB - In this study, the effect of reduced hydrogen partial pressure (PH2) on the generation of carboxylic acids from acidogenic fermentation of glucose was investigated. Three strategies were applied to reduce PH2: headspace removal (T1), CO2 sparging (T2) and H2:CO2 (80:20) sparging (T3). Results showed that the production of carboxylic acids in T1-T3 were 10.21, 11.64 and 12.71 g/L, respectively, which were 1.04, 1.19 and 1.30-fold of that in the control (T4). The composition of carboxylic acids changed significantly in T3 with enhancement of homoacetogenesis, as more acetate and butyrate were produced comparing to the control. In addition, decreasing PH2 led to more carbon flow to carboxylic acids. Species of Clostridium became dominant in treatment T3, resulting in the shift of metabolic pathways. This study demonstrated that decreasing PH2 could increase the production of carboxylic acids, especially under the strategy of enhancing homoacetogenesis.
KW - Acidogenic fermentation
KW - Carboxylic acids production
KW - H partial pressure
KW - Homoacetogenesis
UR - http://www.scopus.com/inward/record.url?scp=85028930220&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2017.08.152
DO - 10.1016/j.biortech.2017.08.152
M3 - Journal article
C2 - 28892705
AN - SCOPUS:85028930220
SN - 0960-8524
VL - 245
SP - 44
EP - 51
JO - Bioresource Technology
JF - Bioresource Technology
ER -
