Steering bio-electro recycling of carbon dioxide towards target compounds through novel inoculation and feeding strategies

被引：7

作者：

Blasco-Gomez, R. ^{[1
]}

Romans-Casas, M. ^{[1
]}

Bolognesi, S. ^{[1
,2
]}

Perona-Vico, E. ^{[3
]}

Colprim, J. ^{[1
]}

Baneras, L. ^{[3
]}

Balaguer, M. D. ^{[1
]}

Puig, S. ^{[1
]}

机构：

[1] Univ Girona, Inst Environm, LEQUIA, 69 Maria Aurelia Capmany, Girona 17003, Spain

[2] Univ Pavia, Dept Civil Engn & Architecture, Via Adolfo Ferrata 1, I-27100 Pavia, Italy

[3] Univ Girona, Inst Aquat Ecol, Grp Mol Microbial Ecol, 40 Maria Aurelia Capmany, Girona 17003, Spain

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2021年 / 9卷 / 04期

关键词：

Microbial Electrochemical Technology; Bioelectrochemical systems; CO2; valorization; Biocathode; Commodity chemicals; Biocatalysis; MICROBIAL ELECTROSYNTHESIS; CHAIN ELONGATION; BUTYRATE; CAPROATE; ACETATE; COLUMN;

D O I：

10.1016/j.jece.2021.105549

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

New strategies in inoculation and operation of bioelectrochemical systems were used to advance in the steering of bio-electro carbon dioxide (CO2) recycling towards chemical compounds. First, the preparation of microbe coated biocathodes ex-situ with putative electroactive species with CO2 as sole carbon source was assayed. Second, CO2 feeding strategies for the operation of BES systems were explored to ensure enough reducing power during batch mode operation. The impact on the proposed changes on the product portfolio and production yields was assessed. The initial enrichment of a putative electroactive community on bare electrode surfaces was proven to be successful and led to a shortening of the start-up period of the system from days to hours. Moreover, the establishment of a new feeding procedure to favor the presence of elevated reducing power availability for cells triggered the production of longer carbon chain carboxylates (max. 0.99 g(butyrate) m(electrode)(-2) d(-1)) and alcohols (max. 0.83 gethanol m(electrode)(-2) d(-1)) at early stages of experiment. This work complements the recent knowledge on the control of bioelectrochemical processes by the establishment of strategies to obtain target added-value compounds from CO2.

引用

页数：9