Improved volatile fatty acids production from proteins of sewage sludge with anthraquinone-2,6-disulfonate (AQDS) under anaerobic condition
Journal
Bioresource Technology
Journal Volume
103
Journal Issue
1
Pages
494-497
Date Issued
2012
Author(s)
Abstract
Organic matters in sewage sludge can be converted into volatile fatty acids (VFAs) as renewable carbon sources. This work for the first time applied anthraquinone-2,6-disulfonate (AQDS) for enhancing VFA production from sewage sludge. With 0.066 or 0.33g AQDSg -1 dried solids (DS), the yields for VFAs peak at 403 or 563mgl -1, 1.9- or 2.7-fold to the control. The accumulated VFAs were principally composed of acetate and propionate. The AQDS enhances degradation rates of model proteins (bovine serum albumin), but had little enhancement on that of model polysaccharides (dextrans). The acidification step is proposed the rate-limiting step for VFA production from sewage sludge, in which the AQDS molecules shuttle electrons to accelerate the redox reactions associated with amino acid degradation. Methanogenic activities are inhibited in the presence of AQDS. The AQDS-assisted VFAs are renewable organic carbon sources, although their direct use for anaerobic digestion is not advised. ? 2011 Elsevier Ltd.
Subjects
Anthraquinone-2,6-disulfonate
Hydrolysis
Metabolites
Sewage sludge
Other Subjects
Acid degradation; Anaerobic conditions; Anthraquinone-2 ,6-disulfonate; Bovine serum albumins; Degradation rate; Direct use; Methanogenic activity; Model proteins; Rate-limiting steps; Renewable carbon sources; Amino acids; Anaerobic digestion; Aromatic compounds; Body fluids; Degradation; Hydrolysis; Ketones; Metabolites; Organic carbon; Redox reactions; Sewage sludge; Volatile fatty acids; acetic acid; anthraquinone derivative; bovine serum albumin; dextran; polysaccharide; propionic acid; protein; volatile fatty acid; activated sludge; anoxic conditions; carbon; fatty acid; metabolite; methanogenesis; molecular analysis; organic matter; polysaccharide; protein; redox conditions; sewage; volatile organic compound; anaerobic reactor; article; biodegradation; electron; methanogenic fermentation; nonhuman; oxidation reduction reaction; priority journal; sewage effluent; Acids; Ammonia; Anaerobiosis; Animals; Anthraquinones; Biodegradation, Environmental; Biotechnology; Cattle; Fatty Acids, Volatile; Fermentation; Hydrolysis; Methane; Nitrogen; Proteins; Serum Albumin, Bovine; Sewage; Time Factors; Bovinae
Type
journal article