An integrated detoxification process with electrodialysis and adsorption from the hemicellulose hydrolysates of yellow poplars.
An integrated detoxification process with electrodialysis (ED) followed by adsorption was performed to remove fermentation inhibitors from hemicellulose hydrolysates. The hydrolysates were prepared by oxalic acid pretreatment of yellow poplars at different temperatures. Of fermentation inhibitors, acetic acid showed high removal efficiency of about 90% and high transport rate during the ED process without membrane fouling. The integration of the detoxification processes increased up to the ethanol yield of 0.33g/g sugar, the ethanol production of about 9g/L, and the productivity of 0.12g/Lh, while the fermentation of non-detoxified hydrolysates did not produce bioethanol. The influence of inhibitor concentration on the fermentability showed that HMF had the highest inhibition effect. The results clearly showed that an integrated detoxification process with ED followed by adsorption removed fermentation inhibitors with high efficiency and increased the fermentability of the oxalic acid pretreated hemicellulose hydrolysates.
Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea; Research Institute for Biotechnology and Environment, Nong Lam University, Hochiminh City, Viet Nam.
Ly Thi Phi
LT
Trinh
Department of Forest Products and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
Chandan
C
Kundu
Department of Forest Products and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea; Bioenergy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea.
Jae-Won
JW
Lee
Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. Electronic address: hjlee68@jnu.ac.kr.
Hong-Joo
HJ
Lee
D000327:Adsorption; D056804:Biofuels; D055664:Electrochemical Techniques; D005285:Fermentation; D006868:Hydrolysis; D031567:Liriodendron / Q000737:chemistry*; D019815:Oxalic Acid; D011134:Polysaccharides / Q000737:chemistry*; D014934:Wood / Q000737:chemistry
D056804:Biofuels; D011134:Polysaccharides; C007916:hemicellulose; D019815:Oxalic Acid
Adsorption; Detoxification; Electrodialysis; Hydrolysate; Inhibitors