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Peracetic Acid Disinfection of Secondary Effluents Discharged off Coastal Seawater
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1992
Year
EngineeringDecontaminationSuspended SolidsOcean PollutionChemical ContaminantWastewater TreatmentMarine PollutionWater TreatmentEnvironmental MicrobiologyFood DisinfectionInfection ControlPeracetic AcidDrinking Water TreatmentAntimicrobial ResistancePeracetic Acid DisinfectionWater QualityEcotoxicologyDisinfectantFood SafetyMicrobial ContaminationEffluent DisposalEnvironmental EngineeringMicrobiologyEnvironmental ToxicologyMedicineIndicator BacteriaMicrobial Risk Assessment
Peracetic acid (PAA) is a potent antimicrobial recently applied to urban effluents, outperforming chlorine, yet quantitative data on its efficacy against faecal indicator bacteria and viruses remain scarce. The study aims to evaluate PAA’s effect on suspended solids to determine if microorganisms regrow post‑treatment. The authors conducted on‑site experiments testing PAA against indicator bacteria, viruses, Salmonella, and enterovirus, and performed a multi‑factor analysis of inactivation efficiency, environmental safety, and cost to compare it with chlorination and ozonation.
Peracetic acid (PAA), a well known powerful antimicrobial agent in hospitals and in agribusiness (Fraser, 1986), has recently been used to disinfect urban effluents. It appears to be highly competitive against chlorine (Audic, 1990; Baldry, French, Slater and Desprez, 1990; Giodani, Iacoponi, Polidori, 1989), the most widely used disinfectant for sewage disposal. As PAA is a new biocide, not much quantitative data is available on its action against the faecal indicator bacteria and viruses. An on-site experimental study investigated the disinfectant action of PAA against these indicator bacteria and viruses as well as against Salmonella and enterovirus. To complete this study we will test its action on suspended solids to find out whether there is regrowth of the microorganisms after treatment. Multi-factor analysis in terms of criteria like inactivation efficiency, safety environmental impact, and cost will be used to compare PAA to chlorination and ozonation, the most commonly used techniques.