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

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 transesterifiabl...

Full description

Saved in:
Bibliographic Details
Published in:Energies (Basel) 2019-10, Vol.12 (20), p.3952
Main Authors: Choi, Oh Kyung, Hendren, Zachary, Ki Young Park, Jae-Kon, Kim, Jo Yong Park, Son, Ahjeong, Jae Woo Lee
Format: Article
Language:English
Subjects:
Activated sludge
Bacteria
Biodiesel fuels
biodiesel potential
Biofuels
Biological activity
Biological treatment
Cell membranes
Chloroform
Community structure
Dependence
Diesel
Esters
Fatty acid methyl esters
fatty acid methyl esters (fames)
in situ transesterification
lipid contents
Lipids
Metabolic pathways
Microorganisms
Nitrifying bacteria
Palmitic acid
Phospholipids
Primary sludge
Raw materials
Retention time
Sewage disposal
Sewage sludge
Sludge
Sludge treatment
Stearic acid
Structural analysis
Transesterification
Waste treatment
Wastewater treatment
Wastewater treatment plants
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12203952