Journal
ENERGIES
Volume 14, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/en14206806
Keywords
crude glycerol; Klebsiella pneumoniae L17; 1,3-propanediol (1,3-PDO); bioelectrochemical system (BES); zero-valent iron (ZVI)
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning of Korea [NRF-2019R1A6A3A 12033897]
- Mid-Career Researcher Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning of Korea [NRF-2021R1A2C200784111]
- WISET, Korea Foundation for Fostering Women in Science and Technology [2021-151]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government (MOTIE) [20214000000140]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20214000000140] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Crude glycerol, a major byproduct in biodiesel production, was successfully transformed into valuable 1,3-propanediol through bioconversion, with improvements in yield and biosynthesis efficiency achieved through the use of a bioelectrochemical system and zero-valent iron.
Crude glycerol is a major byproduct in the production of biodiesel and contains a large number of impurities. The transformation of crude glycerol into valuable compounds such as 1,3-propanediol (1,3-PDO) using clean and renewable processes, like bioconversion, is an important task for the future of the chemical industry. In this study, 1,3-PDO bioproductions from crude and pure glycerol were estimated as 15.4 +/- 0.8 and 11.4 +/- 0.1 mmol/L, respectively. Because 1,3-PDO is a reductive metabolite that requires additional reducing energy, external supplements of electron for further improvement of 1,3-PDO biosynthesis were attempted using a bioelectrochemical system (BES) or zero-valent iron (ZVI). The conversions of crude and pure glycerol under electrode and iron-based cultivation were investigated for 1,3-PDO production accompanied by metabolic shift and cell growth. The BES-based conversion produced 32.6 +/- 0.6 mmol/L of 1,3-PDO with ZVI implementation.
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