Abstract
A biofilm containing both hydrolytic fermentative bacteria and acidogenic bacteria (including acetogenic and acetoclastic bacteria) was developed for the treatment of plastic wastes in a two-phase, batch digester. The biotransformation and further degradation were electrochemically observed. It was found that the organic wastes were initially fermented in a single-phase (i.e. liquid phase) digester, where it entirely obeyed microbial growth kinetics in accumulating acetate. As the carbonates produced were vaporised, the single-phase became a two-phase fermentation (gas and liquid) accumulating volatile fatty acids (VFAs), where it obeyed a proton driving force based on Le Chatelier's principle. Interestingly, as the digester was depressurised to the saturated vapour pressure of water, the accumulated VFAs were rapidly transformed into acetone via butanol, so that the VFAs forms were not observable. It was found that in extreme conditions, the organic feeds were converted and stored into acetone, via butanol.
| Original language | English |
|---|---|
| Pages (from-to) | 1550-1562 |
| Number of pages | 13 |
| Journal | Chemical Engineering Journal |
| Volume | 334 |
| Early online date | 21 Nov 2017 |
| DOIs | |
| Publication status | Published - 15 Feb 2018 |
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Thermoplastic starch wastes are converted and stored into acetone through butanol in a depressurised digester. / Oh, Sung T.; Martin, Alastair; Kang, Soo Jung.
In: Chemical Engineering Journal, Vol. 334, 15.02.2018, p. 1550-1562.Research output: Contribution to journal › Article
TY - JOUR
T1 - Thermoplastic starch wastes are converted and stored into acetone through butanol in a depressurised digester
AU - Oh, Sung T.
AU - Martin, Alastair
AU - Kang, Soo Jung
PY - 2018/2/15
Y1 - 2018/2/15
N2 - A biofilm containing both hydrolytic fermentative bacteria and acidogenic bacteria (including acetogenic and acetoclastic bacteria) was developed for the treatment of plastic wastes in a two-phase, batch digester. The biotransformation and further degradation were electrochemically observed. It was found that the organic wastes were initially fermented in a single-phase (i.e. liquid phase) digester, where it entirely obeyed microbial growth kinetics in accumulating acetate. As the carbonates produced were vaporised, the single-phase became a two-phase fermentation (gas and liquid) accumulating volatile fatty acids (VFAs), where it obeyed a proton driving force based on Le Chatelier's principle. Interestingly, as the digester was depressurised to the saturated vapour pressure of water, the accumulated VFAs were rapidly transformed into acetone via butanol, so that the VFAs forms were not observable. It was found that in extreme conditions, the organic feeds were converted and stored into acetone, via butanol.
AB - A biofilm containing both hydrolytic fermentative bacteria and acidogenic bacteria (including acetogenic and acetoclastic bacteria) was developed for the treatment of plastic wastes in a two-phase, batch digester. The biotransformation and further degradation were electrochemically observed. It was found that the organic wastes were initially fermented in a single-phase (i.e. liquid phase) digester, where it entirely obeyed microbial growth kinetics in accumulating acetate. As the carbonates produced were vaporised, the single-phase became a two-phase fermentation (gas and liquid) accumulating volatile fatty acids (VFAs), where it obeyed a proton driving force based on Le Chatelier's principle. Interestingly, as the digester was depressurised to the saturated vapour pressure of water, the accumulated VFAs were rapidly transformed into acetone via butanol, so that the VFAs forms were not observable. It was found that in extreme conditions, the organic feeds were converted and stored into acetone, via butanol.
U2 - 10.1016/j.cej.2017.11.107
DO - 10.1016/j.cej.2017.11.107
M3 - Article
VL - 334
SP - 1550
EP - 1562
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -