Use of hydrophilic and hydrophobic microfiltration membranes to remove microorganisms and organic pollutants from primary effluents.
Primary-effluent wastewater from the Allegheny County Sanitary Authority (Pennsylvania) was used as a surrogate for combined-sewer-overflow waters contained in the sewershed. Pathogens contained in combined-primary-effluent wastewaters or combined-sewer overflows (CSOs) may pose a human-health threat to those coming in contact with such receiving waters. Polymeric ultra- and nano-membranes can be used to capture these microorganisms from CSOs. This research investigates the ability of polymeric hydrophobic and hydrophilic membranes, ranging in pore size from 0.2 to 0.8 microm, to remove pathogen-indicator organisms (Escherichia coli, enterococcus, and fecal coliforms). Membranes, with pore size 0.45 microm and smaller, were able to reduce the bacteria levels to nondetectable levels, with the sole exception of one membrane with pore size 0.3 microm.
Modise
Claude M
CM
Department of Civil and Environmental Engineering, University of Pittsburgh, Pennsylvania 15261, USA.
Bendick
John A
JA
Miller
C J
CJ
Neufeld
Ronald D
RD
Vidic
Radisav D
RD
D001419:Bacteria / Q000302:isolation & purification*; D004755:Enterobacteriaceae / Q000302:isolation & purification; D016983:Enterococcus / Q000302:isolation & purification; D004926:Escherichia coli / Q000302:isolation & purification; D005374:Filtration; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000302:isolation & purification*; D010316:Particle Size; D010414:Pennsylvania; D016062:Porosity; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D013997:Time Factors; D014871:Water Microbiology; D014872:Water Movements; D018508:Water Purification / Q000379:methods*
D008567:Membranes, Artificial; D009930:Organic Chemicals; D012722:Sewage