Enhanced production of volatile fatty acids (VFAs) from sewage sludge by £]-cyclodextrin
Journal
Bioresource Technology
Journal Volume
110
Pages
688-691
Date Issued
2012
Author(s)
Abstract
Organic matter in sewage sludge can be converted into volatile fatty acids (VFAs) as renewable carbon sources. This work for the first time demonstrates that £]-cyclodextrin (£]-CD) molecules enhance sludge hydrolysis for production of VFAs. With 0.2g£]-CDg -1 dried solids (DSs), the increment rate for VFAs peaked at 4200gg -1DSsg -1 £]-CD, with acetate and propionate as the predominant VFAs. Compositional and microbial community analyses confirm that the £]-CD molecules break a cell's membrane, such that it releases intracellular substances. Although £]-CD molecules inhibited activities of methanogens, they did not impair those of acid-forming bacteria, thereby demonstrating that £]-CD-assisted VFAs are renewable organic carbon sources, except in anaerobic digestion processes. ? 2011 Elsevier Ltd.
Subjects
£]-Cyclodextrin
Hydrolysis
Metabolites
Sewage sludge
Other Subjects
Anaerobic digestion process; Microbial community analysis; Renewable carbon sources; Hydrolysis; Metabolites; Molecules; Sewage sludge; Volatile fatty acids; acetic acid; beta cyclodextrin; propionic acid; volatile fatty acid; carbon; cell organelle; chemical composition; fatty acid; hydrolysis; inhibition; membrane; metabolite; microbial community; molecular analysis; organic matter; sewage; sludge; volatile substance; article; carbon source; cell membrane; chemical composition; controlled study; denaturing gradient gel electrophoresis; enzyme activity; hydrolysis; methanogen; microbial community; polymerase chain reaction; priority journal; sludge; solid; beta-Cyclodextrins; Fatty Acids; Hydrolysis; Sewage; Volatilization
Type
journal article