Stimulatory effect of in-situ detoxification on bioethanol production by rice straw

Qiuzhuo Zhang, Huiqin Huang, Hui Han, Zhen Qiu and Varenyam Achal

Energy, 2017, vol. 135, issue C, 32-39

Abstract: An effective ferulic acid degrading bacterium, Escherichia sp. HHQ-1, was added to alkali-pretreated rice straw degrading system to in-situ detoxify the ferulic acid inhibitors existed in the hydrolysates. It was shown that the production of reducing sugars in Escherichia sp. HHQ-1-Trichoderma reesei consortia degrading system could achieve 221.33 mg L−1 at 60 h, which was 7.84% higher than that in single degrading system. All the three main cellulases were more stable in consortia degrading system, and the activity of β-glucosidase was 4.23 fold higher than that in single degrading system. Besides, it was supposed that cell membrane was more integrally protected in consortia degrading system. Scanning Electron Microscope (SEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectrometer (FTIR) were used to observe the morphological changes of rice straw biomass. It was indicated that in-situ detoxification could severely destroy basic tissue of rice straw, dramatically decrease crystallinity index of crystalline region and effectively degrade refractory-degraded lignin parts of lignocellulose. Compared to the single degrading system, the consortia degrading system could in-situ detoxify the main inhibitors which existed in pretreated rice straw hydrolysates, realize simultaneous pretreatment and detoxification, thus increasing the bioethanol yield and reducing the cost of bioethanol production.

Keywords: Consortia system; In-situ detoxification; Rice straw; Bioethanol (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544217310939
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:135:y:2017:i:c:p:32-39

DOI: 10.1016/j.energy.2017.06.099

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().