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Peracetic acid disinfection: a feasible alternative to wastewater chlorination.
Water Environ Res. 2007 Apr; 79(4):341-50.WE

Abstract

The paper summarizes the results of a bench-scale study to evaluate the feasibility of using peracetic acid (PAA) as a substitute for sodium hypochlorite both for discharge into surface water and for agricultural reuse. Trials were carried out with increasing doses (1, 2, 3, 5, 10, and 15 mg/L) and contact times (6, 12, 18, 36, 42, and 54 minutes) to study disinfectant decay and bacterial removal and regrowth, using fecal coliform and Escherichia coli (E. coli) as process efficiency indicators. Peracetic acid decay kinetics was evaluated in tap water and wastewater; in both cases, PAA decays according to first-order kinetics with respect to time, and a correlation was found between PAA oxidative initial consumption and wastewater characteristics. The PAA disinfection efficiency was correlated with operating parameters (active concentration and contact time), testing different kinetic models. Two data groups displaying a different behavior on the basis of initial active concentration ranges (1 to 2 mg/L and 5 to 15 mg/L, respectively) can be outlined. Both groups had a "tailing-off" inactivation curve with respect to time, but the second one showed a greater inactivation rate. Moreover, the effect of contact time was greater at the lower doses. Hom's model, used separately for the two data groups, was found to best fit experimental data, and the disinfectant active concentration appears to be the main factor affecting log-survival ratios. Moreover, the S-model better explains the initial resistance of E. coli, especially at low active concentrations (< 2 mg/L) and short contact times (< 12 minutes). Microbial counts, performed by both traditional methods and flow cytometry, immediately and 5 hours after sample collection (both with or without residual PAA inactivation), showed that no appreciable regrowth took place after 5 hours, neither for coliform group bacteria, nor for total heterotrophic bacteria.

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Authors+Show Affiliations

Rossi S
DIIAR Environmental Section, Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy. sabrina.rossi@polimi.it
Antonelli M
No affiliation info available
Mezzanotte V
No affiliation info available
Nurizzo C
No affiliation info available

MeSH

DisinfectantsDisinfectionDose-Response Relationship, DrugEscherichia coliFecesPeracetic AcidSewageTime FactorsWaste Disposal, FluidWater MicrobiologyWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17489268

Citation

Rossi, S, et al. "Peracetic Acid Disinfection: a Feasible Alternative to Wastewater Chlorination." Water Environment Research : a Research Publication of the Water Environment Federation, vol. 79, no. 4, 2007, pp. 341-50.
Rossi S, Antonelli M, Mezzanotte V, et al. Peracetic acid disinfection: a feasible alternative to wastewater chlorination. Water Environ Res. 2007;79(4):341-50.
Rossi, S., Antonelli, M., Mezzanotte, V., & Nurizzo, C. (2007). Peracetic acid disinfection: a feasible alternative to wastewater chlorination. Water Environment Research : a Research Publication of the Water Environment Federation, 79(4), 341-50.
Rossi S, et al. Peracetic Acid Disinfection: a Feasible Alternative to Wastewater Chlorination. Water Environ Res. 2007;79(4):341-50. PubMed PMID: 17489268.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Peracetic acid disinfection: a feasible alternative to wastewater chlorination. AU - Rossi,S, AU - Antonelli,M, AU - Mezzanotte,V, AU - Nurizzo,C, PY - 2007/5/11/pubmed PY - 2007/9/14/medline PY - 2007/5/11/entrez SP - 341 EP - 50 JF - Water environment research : a research publication of the Water Environment Federation JO - Water Environ Res VL - 79 IS - 4 N2 - The paper summarizes the results of a bench-scale study to evaluate the feasibility of using peracetic acid (PAA) as a substitute for sodium hypochlorite both for discharge into surface water and for agricultural reuse. Trials were carried out with increasing doses (1, 2, 3, 5, 10, and 15 mg/L) and contact times (6, 12, 18, 36, 42, and 54 minutes) to study disinfectant decay and bacterial removal and regrowth, using fecal coliform and Escherichia coli (E. coli) as process efficiency indicators. Peracetic acid decay kinetics was evaluated in tap water and wastewater; in both cases, PAA decays according to first-order kinetics with respect to time, and a correlation was found between PAA oxidative initial consumption and wastewater characteristics. The PAA disinfection efficiency was correlated with operating parameters (active concentration and contact time), testing different kinetic models. Two data groups displaying a different behavior on the basis of initial active concentration ranges (1 to 2 mg/L and 5 to 15 mg/L, respectively) can be outlined. Both groups had a "tailing-off" inactivation curve with respect to time, but the second one showed a greater inactivation rate. Moreover, the effect of contact time was greater at the lower doses. Hom's model, used separately for the two data groups, was found to best fit experimental data, and the disinfectant active concentration appears to be the main factor affecting log-survival ratios. Moreover, the S-model better explains the initial resistance of E. coli, especially at low active concentrations (< 2 mg/L) and short contact times (< 12 minutes). Microbial counts, performed by both traditional methods and flow cytometry, immediately and 5 hours after sample collection (both with or without residual PAA inactivation), showed that no appreciable regrowth took place after 5 hours, neither for coliform group bacteria, nor for total heterotrophic bacteria. SN - 1061-4303 UR - https://www.unboundmedicine.com/medline/citation/17489268/Peracetic_acid_disinfection:_a_feasible_alternative_to_wastewater_chlorination_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&amp;sid=nlm:pubmed&amp;issn=1061-4303&amp;date=2007&amp;volume=79&amp;issue=4&amp;spage=341 DB - PRIME DP - Unbound Medicine ER -