BioChem - DOS

Continuous bioproduction of short-chain fatty acids from sludge enhanced by the combined use of surfactant and alkaline pH

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Chen, Y.; Liu, K.; Su, Y.; Zheng, X.; Wang, Q.

This work reported the enhancement of continuous SCFA production from sludge by the combined use of surfactant (sodium dodecylbenzene sulfonate (SDBS)) and pH 10 (i.e., SDBS & pH 10). The maximal SCFA production (2056mg COD/L) was achieved under the SDBS & pH 10 condition at a sludge retention time (SRT) of 12d, which was much higher than that of the blank, sole SDBS, or pH 10. The mechanisms investigation showed that the combined strategy had greater sludge solubilization, higher protein hydrolysis, and lower activity of methanogens. Fluorescence in situ hybridization analysis revealed that the abundance of bacteria was increased, whereas that of archaea was decreased by SDBS & pH 10. The excitation emission matrix fluorescence spectroscopy assay further suggested that SBDS caused protein structure change, which benefited protein hydrolysis.

2013

Elsevier Applied Science

0960-8524

140

pp.97-102

10.1016/j.biortech.2013.04.075

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART66099566

Short-chain fatty acids (SCFA); Sludge retention time (SRT); Enzyme activity; Fluorescence in situ hybridization (FISH); Protein structure