TY - JOUR
T1 - Hazardous events in membrane bioreactors - Part 1
T2 - Impacts on key operational and bulk water quality parameters
AU - Trinh, Trang
AU - Branch, Amos
AU - Hambly, Adam C.
AU - Carvajal, Guido
AU - Coleman, Heather M.
AU - Stuetz, Richard M.
AU - Drewes, Jörg E.
AU - Le-Clech, Pierre
AU - Khan, Stuart J.
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2014/11/2
Y1 - 2014/11/2
N2 - In this series of articles, the potential impacts of a number of operational 'hazardous events' on membrane bioreactors (MBRs) removal performance were investigated. The hazardous events assessed included salinity shock, 2,4-dinitrophenol (DNP) shock, ammonia shock, organic carbon shock, feed starvation, loss of power supply, loss of aeration, complete wash out of biomass, defective fibres, and physical membrane damage. This initial study focuses on the removal of key bulk water quality and operational parameters, i.e. changes in pH, turbidity, chemical oxygen demand (COD), dissolved organic carbon (DOC), biomass concentrations, capillary suction time (CST) and membrane fouling rate. DNP, salinity and organic carbon shock conditions were shown to significantly impact removal of organic matter (in terms of COD and DOC). These findings suggest that changes in COD and DOC concentrations were determined to be effective parameters for monitoring the impacts of these shock load events. Feed starvation significantly impacted biomass concentrations but the overall system performance remained relatively resilient, as it continued to achieve effective COD and DOC removals. The results from physical membrane damage experiment confirm that turbidity is an effective indicator for online monitoring of physical membrane damage. The results of this study can assist with validation of MBR processes.
AB - In this series of articles, the potential impacts of a number of operational 'hazardous events' on membrane bioreactors (MBRs) removal performance were investigated. The hazardous events assessed included salinity shock, 2,4-dinitrophenol (DNP) shock, ammonia shock, organic carbon shock, feed starvation, loss of power supply, loss of aeration, complete wash out of biomass, defective fibres, and physical membrane damage. This initial study focuses on the removal of key bulk water quality and operational parameters, i.e. changes in pH, turbidity, chemical oxygen demand (COD), dissolved organic carbon (DOC), biomass concentrations, capillary suction time (CST) and membrane fouling rate. DNP, salinity and organic carbon shock conditions were shown to significantly impact removal of organic matter (in terms of COD and DOC). These findings suggest that changes in COD and DOC concentrations were determined to be effective parameters for monitoring the impacts of these shock load events. Feed starvation significantly impacted biomass concentrations but the overall system performance remained relatively resilient, as it continued to achieve effective COD and DOC removals. The results from physical membrane damage experiment confirm that turbidity is an effective indicator for online monitoring of physical membrane damage. The results of this study can assist with validation of MBR processes.
KW - Conventional parameters
KW - Membrane treatment failure
KW - Membrane treatment process validation
KW - Process performance
KW - Shock loads
UR - http://www.scopus.com/inward/record.url?scp=84948713294&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2015.03.003
DO - 10.1016/j.memsci.2015.03.003
M3 - Article
AN - SCOPUS:84948713294
SN - 0376-7388
VL - 497
SP - 494
EP - 503
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -