Reduction of Cryptosporidium, Giardia, and Fecal Indicators by Bardenpho Wastewater Treatment

Environmental Science & Technology
Bradley W SchmitzIan L Pepper

Abstract

Increased demand for water reuse and reclamation accentuates the importance for optimal wastewater treatment to limit protozoa in effluents. Two wastewater treatment plants utilizing advanced Bardenpho were investigated over a 12-month period to determine the incidence and reduction of Cryptosporidium, Giardia, Cyclospora, and fecal indicators. Results were compared to facilities that previously operated in the same geographical area. Protozoa (oo)cysts were concentrated using an electronegative filter and subsequently detected by fluorescent microscopy and/or PCR methods. Cryptosporidium and Giardia were frequently detected in raw sewage, but Cyclospora was not detected in any wastewater samples. Facilities with Bardenpho treatment exhibited higher removals of (oo)cysts than facilities utilizing activated sludge or trickling filters. This was likely due to Bardenpho systems having increased solid wasting rates; however, this mechanism cannot be confirmed as sludge samples were not analyzed. Use of dissolved-air-flotation instead of sedimentation tanks did not result in more efficient removal of (oo)cysts. Concentrations of protozoa were compared with each other, Escherichia coli, somatic coliphage, and viruses (pepper mild mot...Continue Reading

References

May 1, 1990·Applied and Environmental Microbiology·D G KorichC R Sterling
Jul 21, 1994·The New England Journal of Medicine·W R Mac KenzieJ B Rose
Jan 1, 1995·The Journal of Applied Bacteriology·T N Whitmore, L J Robertson
Apr 2, 1999·Applied and Environmental Microbiology·L XiaoA A Lal
Aug 7, 2003·Applied and Environmental Microbiology·Angela L GennaccaroJoan B Rose
May 26, 2004·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Carolyn M ReadR C Andrew Thompson
Nov 30, 2004·Veterinary Parasitology·Walter Q Betancourt, Joan B Rose
May 17, 2005·Journal of Microbiological Methods·Randi M McCuin, Jennifer L Clancy
Jun 4, 2005·Applied and Environmental Microbiology·Valerie J HarwoodJoan B Rose
Apr 4, 2007·Journal of Water and Health·Panagiotis KaranisHuw Smith
May 27, 2008·Applied and Environmental Microbiology·Laura F Lalonde, Alvin A Gajadhar
Jun 9, 2009·Experimental Parasitology·Huw V Smith, Rosely A B Nichols
Jan 13, 2010·Clinical Microbiology Reviews·Ynés R Ortega, Roxana Sanchez
Jul 14, 2010·International Journal of Hygiene and Environmental Health·Judit PlutzerPanagiotis Karanis
Sep 18, 2010·Annali Dell'Istituto Superiore Di Sanità·Giuseppina La RosaMichele Muscillo
Dec 14, 2011·Current Opinion in Biotechnology·Tiong Gim Aw, Joan B Rose
Mar 25, 2014·Emerging Infectious Diseases·Micael WiderströmJohan Lindh
Feb 4, 2016·Journal of Water and Health·Abidelfatah M Nasser
Jul 23, 2016·Environmental Science & Technology·Bradley W SchmitzIan L Pepper

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Citations

Jan 29, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Bradley W SchmitzSamendra Sherchan
Dec 19, 2019·Journal of Water and Health·Innocent K TumwebazeHeather M Murphy
Nov 6, 2020·Environmental Science and Pollution Research International·Hasti DaraeiAmin Mousavi Khaneghah

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