Campus Units
Mechanical Engineering, Agricultural and Biosystems Engineering, Chemical and Biological Engineering, Bioeconomy Institute (BEI), Food Science and Human Nutrition
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
11-2019
Journal or Book Title
Bioresource Technology
Volume
292
First Page
121976
DOI
10.1016/j.biortech.2019.121976
Abstract
Among the products of pyrolysis is an aqueous phase (AP), which contains a significant fraction of carbon but is too dilute to make recovery of this organic content cost-effectively. This study was to explore the use of AP for anaerobic digestion. Different treatment methods including overliming, Fenton's reagent oxidation, bleaching and activated carbon adsorption were investigated to reduce toxicity of AP. Overliming treatment increased biogas production up to 32-fold compared to non-treated AP. Enhancing the tolerance of the bacterial and archaeal community to the AP toxicity was also attempted with a directed evolution method, resulting the microbes’ tolerance to AP from 5% to 14%. Directed evolution resulted a major bacterial taxa as Cloacimonetes, Firmicutes, and Chloroflexi, while shifted the predominant archaea shifted from acetoclastic to hydrogenotrophic methanogens. Collectively, the results demonstrated that combining feedstock treatment and directed evolution of the microbial community is an effective way for AP anaerobic digestion.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Copyright Owner
Elsevier Ltd.
Copyright Date
2019
Language
en
File Format
application/pdf
Recommended Citation
Zhou, Haoqin; Brown, Robert C.; and Wen, Zhiyou, "Anaerobic digestion of aqueous phase from pyrolysis of biomass: Reducing toxicity and improving microbial tolerance" (2019). Mechanical Engineering Publications. 376.
https://lib.dr.iastate.edu/me_pubs/376
Included in
Bioresource and Agricultural Engineering Commons, Energy Systems Commons, Food Microbiology Commons
Comments
This is a manuscript of an article published as Zhou, Haoqin, Robert C. Brown, and Zhiyou Wen. "Anaerobic digestion of aqueous phase from pyrolysis of biomass: reducing toxicity and improving microbial tolerance." Bioresource Technology (2019): 121976. DOI: 10.1016/j.biortech.2019.121976. Posted with permission.