Abstract
| Original language | English |
|---|---|
| Journal | Environment International |
| Volume | 127 |
| Pages (from-to) | 134-141 |
| ISSN | 0160-4120 |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- Caproate
- Chain elongation
- Biogilm
- Ammonia
- Clostridium kluyveri
- Weat straw
Cite this
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Immobilization of Clostridium kluyveri on wheat straw to alleviate ammonia inhibition during chain elongation for n-caproate production. / Zhang, Cunsheng; Yang, Li; Tsapekos, Panagiotis; Zhang, Yifeng; Angelidaki, Irini.
In: Environment International, Vol. 127, 2019, p. 134-141.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Immobilization of Clostridium kluyveri on wheat straw to alleviate ammonia inhibition during chain elongation for n-caproate production
AU - Zhang, Cunsheng
AU - Yang, Li
AU - Tsapekos, Panagiotis
AU - Zhang, Yifeng
AU - Angelidaki, Irini
PY - 2019
Y1 - 2019
N2 - Biosynthesis of n-caproate from waste streams rich in acetate and ethanol through chain elongation has offered a potentially sustainable way for future production of liquid biofuels. However, most of the waste streams that fit with the purpose (e.g., digestate) are also rich in ammonium which at high concentration may cause toxic effects on the bioconversion process. This study aims to develop a robust, efficient, and cost-effective chain elongation process with high caproate productivity and tolerance to high ammonia concentration, through immobilization of Clostridium kluyveri on biomass particles as immobilization material. The threshold ammonia concentration for suspended cells cultivation was 2.1 g/L, while it was higher than 5.0 g/L for the wheat straw immobilized system. The caproate production process was dependent on the selected carriers and was performing in the order of: wheat straw > grass straw > saw dust. The biofilm immobilized on the wheat straw showed good reuse capability for caproate production under high ammonia concentration. Moreover, the lag phase for caproate production was shortened from 72 to 30 h after 8 times reuse. These results proved that caproate production and tolerance of chain elongation to ammonia toxicity could be enhanced via cell immobilization. This study offers insight into future development of efficient and cost-effective chain elongation system for production of caproate and other value-added products.
AB - Biosynthesis of n-caproate from waste streams rich in acetate and ethanol through chain elongation has offered a potentially sustainable way for future production of liquid biofuels. However, most of the waste streams that fit with the purpose (e.g., digestate) are also rich in ammonium which at high concentration may cause toxic effects on the bioconversion process. This study aims to develop a robust, efficient, and cost-effective chain elongation process with high caproate productivity and tolerance to high ammonia concentration, through immobilization of Clostridium kluyveri on biomass particles as immobilization material. The threshold ammonia concentration for suspended cells cultivation was 2.1 g/L, while it was higher than 5.0 g/L for the wheat straw immobilized system. The caproate production process was dependent on the selected carriers and was performing in the order of: wheat straw > grass straw > saw dust. The biofilm immobilized on the wheat straw showed good reuse capability for caproate production under high ammonia concentration. Moreover, the lag phase for caproate production was shortened from 72 to 30 h after 8 times reuse. These results proved that caproate production and tolerance of chain elongation to ammonia toxicity could be enhanced via cell immobilization. This study offers insight into future development of efficient and cost-effective chain elongation system for production of caproate and other value-added products.
KW - Caproate
KW - Chain elongation
KW - Biogilm
KW - Ammonia
KW - Clostridium kluyveri
KW - Weat straw
U2 - 10.1016/j.envint.2019.03.032
DO - 10.1016/j.envint.2019.03.032
M3 - Journal article
VL - 127
SP - 134
EP - 141
JO - Environment International
JF - Environment International
SN - 0160-4120
ER -