The paper is a review of previous research on secondary effluent disinfection by peracetic acid (PAA) integrated with new data about the effect of a preliminary flash-mixing step. The process was studied at bench and pilot scale to assess its performance for discharge in surface water and agricultural reuse (target microorganisms: Escherichia coli and faecal coliform bacteria). The purposes of the research were: (1) determining PAA decay and disinfection kinetics as a function of operating parameters, (2) evaluating PAA suitability as a disinfectant, (3) assessing long-term disinfection efficiency, (4) investigating disinfected effluent biological toxicity on some aquatic indicator organisms (Vibrio fischeri, Daphnia magna and Selenastrum capricornutum), (5) comparing PAA with conventional disinfectants (sodium hypochlorite, UV irradiation). PAA disinfection was capable of complying with Italian regulations on reuse (10 CFU/100 mL for E. coli) and was competitive with benchmarks. No regrowth phenomena were observed, as long as needed for agricultural reuse (29 h after disinfection), even at negligible concentrations of residual disinfectant. The toxic effect of PAA on the aquatic environment was due to the residual disinfectant in the water, rather than to chemical modification of the effluent.

Antonelli, M., Turolla, A., Mezzanotte, V., Nurizzo, C. (2013). Peracetic Acid for Secondary Effluent Disinfection: a Comprehensive Performance Assessment. WATER SCIENCE AND TECHNOLOGY, 68(12), 2638-2644 [10.2166/wst.2013.542].

Peracetic Acid for Secondary Effluent Disinfection: a Comprehensive Performance Assessment

MEZZANOTTE, VALERIA FEDERICA MARIA;
2013

Abstract

The paper is a review of previous research on secondary effluent disinfection by peracetic acid (PAA) integrated with new data about the effect of a preliminary flash-mixing step. The process was studied at bench and pilot scale to assess its performance for discharge in surface water and agricultural reuse (target microorganisms: Escherichia coli and faecal coliform bacteria). The purposes of the research were: (1) determining PAA decay and disinfection kinetics as a function of operating parameters, (2) evaluating PAA suitability as a disinfectant, (3) assessing long-term disinfection efficiency, (4) investigating disinfected effluent biological toxicity on some aquatic indicator organisms (Vibrio fischeri, Daphnia magna and Selenastrum capricornutum), (5) comparing PAA with conventional disinfectants (sodium hypochlorite, UV irradiation). PAA disinfection was capable of complying with Italian regulations on reuse (10 CFU/100 mL for E. coli) and was competitive with benchmarks. No regrowth phenomena were observed, as long as needed for agricultural reuse (29 h after disinfection), even at negligible concentrations of residual disinfectant. The toxic effect of PAA on the aquatic environment was due to the residual disinfectant in the water, rather than to chemical modification of the effluent.
Articolo in rivista - Articolo scientifico
Agricultural reuse; Ecotoxicity; Kinetics; Microbial regrowth; Peracetic acid; Wastewater disinfection
English
2013
68
12
2638
2644
reserved
Antonelli, M., Turolla, A., Mezzanotte, V., Nurizzo, C. (2013). Peracetic Acid for Secondary Effluent Disinfection: a Comprehensive Performance Assessment. WATER SCIENCE AND TECHNOLOGY, 68(12), 2638-2644 [10.2166/wst.2013.542].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/61027
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