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Characterization and Recovery of In Situ Transesterifiable Lipids (TLs) as Potential Biofuel Feedstock from Sewage Sludge Obtained from Various Sewage Treatment Plants (STPs)

Title
Characterization and Recovery of In Situ Transesterifiable Lipids (TLs) as Potential Biofuel Feedstock from Sewage Sludge Obtained from Various Sewage Treatment Plants (STPs)
Authors
Choi, Oh KyungHendren, ZacharyPark, Ki YoungKim, Jae-KonPark, Jo YongSon, AhjeongLee, Jae Woo
Ewha Authors
손아정
SCOPUS Author ID
손아정scopus
Issue Date
2019
Journal Title
ENERGIES
ISSN
1996-1073JCR Link
Citation
ENERGIES vol. 12, no. 20
Keywords
sewage sludgein situ transesterificationfatty acid methyl esters (FAMEs)lipid contentsbiodiesel potential
Publisher
MDPI
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
This study purposed to characterize the sewage sludge from various sewage treatment plants (STPs) as a biodiesel feedstock. Crude biodiesel was produced from each dried primary sludge (PS) and waste activated sludge (WAS) via in situ transesterification process. The average yield of transesterifiable lipid (TL) was 77.8% and 60.4% of the total lipid content from PS and WAS, respectively. The TL yield had a greater margin among WAS than PS samples due to differences in the biological processes adopted in each treatment plant. The TL recovered from PS and WAS contained 54.2% and 40.1% fatty acid methyl esters (FAMEs), respectively, which were mostly made up of palmitic acid (C16:0) and stearic acid (C18:0). The FAME composition of the biodiesel in the WAS sample was highly associated with a microbial community that grows otherwise, depending on the purpose of the biological treatment process. In particular, the increase in the proportion of nitrifying bacteria that grow predominantly under a relatively longer solid retention time (SRT) contributed significantly to the improvement in FAME content.
DOI
10.3390/en12203952
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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