TY - JOUR
T1 - The enhancement of anaerobic biodegradability of waste activated sludge by surfactant mediated biological pretreatment
AU - Kavitha, S.
AU - Jayashree, C.
AU - Adish Kumar, S.
AU - Yeom, Ick Tae
AU - Rajesh Banu, J.
PY - 2014/9
Y1 - 2014/9
N2 - In this study, the role of sodium dodecyl sulfate (SDS) was explored for the removal of extracellular polymeric substance (EPS) from waste activated sludge (WAS) followed by enzymatic bacterial pretreatment, which enhanced the subsequent anaerobic biodegradability. EPS was removed with 0.02. g/g SS of SDS. In the results of pretreatment, the suspended solids reduction and chemical oxygen demand solubilization were found to be 25.7% and 19.79% for deflocculated and bacterially pretreated sludge, whereas they were found to be 15.7% and 11% for flocculated sludge (without EPS removal and bacterially pretreated) and 7.85% and 6% for control sludge (raw sludge), respectively. Upon examining the anaerobic biodegradability, the biogas yield potential of deflocculated and bacterially pretreated, flocculated, deflocculated alone, and control sludges were found to be 0.467. L/(g. VS), 0.355. L/(g. VS), 0.315. L/(g. VS), and 0.212. L/(g. VS), respectively. Thus, the deflocculation and bacterial pretreatment improved the anaerobic biodegradability efficiently.
AB - In this study, the role of sodium dodecyl sulfate (SDS) was explored for the removal of extracellular polymeric substance (EPS) from waste activated sludge (WAS) followed by enzymatic bacterial pretreatment, which enhanced the subsequent anaerobic biodegradability. EPS was removed with 0.02. g/g SS of SDS. In the results of pretreatment, the suspended solids reduction and chemical oxygen demand solubilization were found to be 25.7% and 19.79% for deflocculated and bacterially pretreated sludge, whereas they were found to be 15.7% and 11% for flocculated sludge (without EPS removal and bacterially pretreated) and 7.85% and 6% for control sludge (raw sludge), respectively. Upon examining the anaerobic biodegradability, the biogas yield potential of deflocculated and bacterially pretreated, flocculated, deflocculated alone, and control sludges were found to be 0.467. L/(g. VS), 0.355. L/(g. VS), 0.315. L/(g. VS), and 0.212. L/(g. VS), respectively. Thus, the deflocculation and bacterial pretreatment improved the anaerobic biodegradability efficiently.
KW - Anaerobic biodegradability
KW - Cell disruption
KW - Enzyme activity
KW - Extracellular polymeric substance
KW - Waste activated sludge (WAS)
UR - https://www.scopus.com/pages/publications/84905027657
U2 - 10.1016/j.biortech.2014.01.118
DO - 10.1016/j.biortech.2014.01.118
M3 - Article
C2 - 24559742
AN - SCOPUS:84905027657
SN - 0960-8524
VL - 168
SP - 159
EP - 166
JO - Bioresource Technology
JF - Bioresource Technology
ER -
