03321nam a2200673Ia 4500 MX-MdCICY 20260521091520.0 CICY B-16282 Urban water reuse: microbial pathogens control by direct filtration and ultraviolet disinfection Journal of Water and Health, 12(3), p.465-473, 2014 Physicochemical treatment efficiency for unrestricted urban water reuse was evaluated at a conventional activated-sludge wastewater treatment plant (WWTP). Pilot plant set-up consisted of an alum coagulation step, granular media upflow flocculation and direct downflow dual-media filtration followed by ultraviolet disinfection (dose of 95 mJ cm-2). Optimum aluminum sulfate dosage of 10 mg L-1 and coagulation pH 7.0 were preset based on bench scale tests. Under WWTP stable operation, water quality met United States Environmental Protection Agency (USEPA)suggested guidelines for unrestricted urban reuse regarding turbidity (mean value 1.3 NTU)and suspended solids (mean value 2.1 mg L-1). When WWTP overall plant performance dropped from 90 to 80 percent (although BOD value stayed below 6 mg O2 L-1, suggesting unrestricted reuse), solids breakthrough in filtrate was observed. Microorganism removal rates were: total coliforms 60.0 percent, Escherichia coli 63.0 percent, Giardia spp. 81.0 percent, and helminth eggs 62.5 percent; thus organisms still remained in filtrate. Ultraviolet (UV)disinfection efficiency was 4.1- and 3.8-log for total coliforms and E. coli, respectively. Considering low UV efficiency obtained for helminths and the survival of protozoa and helminths in the environment, effluent quality presents risk to public health if destined for unrestricted urban reuse. ARTICLE CRYPTOSPORIDIUM DISINFECTION ESCHERICHIA COLI FILTRATION FLOCCULATION GIARDIA HELMINTH LIMIT OF QUANTITATION NONHUMAN PATHOGENESIS QUANTITATIVE ANALYSIS SUSPENDED PARTICULATE MATTER TURBIDITY ULTRAVIOLET DISINFECTION ULTRAVIOLET DISINFECTION WASTE WATER MANAGEMENT WASTE WATER RECYCLING WATER QUALITY ANIMAL ARTICLE BACTERIUM BRAZIL CRYPTOSPORIDIUM EQUIPMENT FILTRATION GIARDIA GROWTH, DEVELOPMENT AND AGING HELMINTH ISOLATION AND PURIFICATION METHODOLOGY OOCYST OOCYTE PILOT STUDY RADIATION EXPOSURE STANDARD ULTRAVIOLET RADIATION WATER MANAGEMENT De Lima Isaac, R. Dos Santos, L.U. Tosetto, M.S. Franco, R.M.B. Guimarães, J.R. https://drive.google.com/file/d/1hRakK2Jx6tBgrLeQX4V6OIuJzY4_86zP/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 26395 26395 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-16282 2025-06-25 16:01:48 2025-06-25 REF1