Characterization and Recovery of In Situ Transesterifiable Lipids (TLs) as Potential Biofuel Feedstock from Sewage Sludge Obtained from Various Sewage Treatment Plants (STPs)
- 주제(키워드) sewage sludge , in situ transesterification , fatty acid methyl esters (FAMEs) , lipid contents , biodiesel potential
- 주제(기타) Energy & Fuels
- 설명문(일반) [Choi, Oh Kyung; Lee, Jae Woo] Korea Univ, Dept Environm Engn, Sejong 30019, South Korea; [Choi, Oh Kyung; Hendren, Zachary] RTI Int, Ctr Technol Energy Environm & Engn, Res Triangle Pk, Durham, NC 27709 USA; [Park, Ki Young] Konkuk Univ, Dept Civil & Environm Syst Engn, Seoul 05029, South Korea; [Kim, Jae-Kon; Park, Jo Yong] Korea Petr Qual & Distribut Author, Res Inst Petr Technol, Chungbuk 28115, South Korea; [Son, Ahjeong] Ewha Womans Univ, Dept Environm Sci & Engn, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- OA유형 gold, Green Published
- 발행기관 MDPI
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000165858
- 본문언어 영어
- Published As http://dx.doi.org/10.3390/en12203952
초록/요약
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.
more