TY - JOUR
T1 - Evaluation of surfactants on waste activated sludge fermentation by pyrosequencing analysis
AU - Zhou, Aijuan
AU - Liu, Wenzong
AU - Varrone, Cristiano
AU - Wang, Youzhao
AU - Wang, Aijie
AU - Yue, Xiuping
PY - 2015/10
Y1 - 2015/10
N2 - The effects of three widely-used surfactants on waste activated sludge (WAS) fermentation and microbial community structures were investigated. Rhamnolipid bio-surfactants (RL) showed more positive effects on WAS hydrolysis and acidification compared to chemosynthetic surfactants, such as sodium dodecylsulphate (SDS) and sodium dodecyl benzene sulfonate (SDBS). The highest SCOD and VFAs concentrations obtained with RL were 1.15-fold and 1.16-fold that of SDS, and up to 1.73 and 3.63 times higher than those obtained with SDBS. Pyrosequencing analysis showed that an evident reduction in bacterial diversity in surfactant-treated WAS. Moreover, acid-producing bacteria (such as Megasphaera and Oscillibacter), detected with RL, were (6.8% and 6.4% in proportion) more abundant than with SDS, and were rarely found in SDBS and the control. The results also revealed that RL allowed efficient hydrolysis enhancement and was favorable to functional microorganisms for further acidification during WAS fermentation.
AB - The effects of three widely-used surfactants on waste activated sludge (WAS) fermentation and microbial community structures were investigated. Rhamnolipid bio-surfactants (RL) showed more positive effects on WAS hydrolysis and acidification compared to chemosynthetic surfactants, such as sodium dodecylsulphate (SDS) and sodium dodecyl benzene sulfonate (SDBS). The highest SCOD and VFAs concentrations obtained with RL were 1.15-fold and 1.16-fold that of SDS, and up to 1.73 and 3.63 times higher than those obtained with SDBS. Pyrosequencing analysis showed that an evident reduction in bacterial diversity in surfactant-treated WAS. Moreover, acid-producing bacteria (such as Megasphaera and Oscillibacter), detected with RL, were (6.8% and 6.4% in proportion) more abundant than with SDS, and were rarely found in SDBS and the control. The results also revealed that RL allowed efficient hydrolysis enhancement and was favorable to functional microorganisms for further acidification during WAS fermentation.
KW - Anaerobic digestion
KW - Microbial community
KW - Pyrosequencing
KW - Surfactant
KW - Waste activated sludge (WAS)
UR - http://www.scopus.com/inward/record.url?scp=84945457584&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2015.06.017
DO - 10.1016/j.biortech.2015.06.017
M3 - Journal article
AN - SCOPUS:84945457584
SN - 0960-8524
VL - 192
SP - 835
EP - 840
JO - Bioresource Technology
JF - Bioresource Technology
ER -