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Adding silver and copper to hydrogen peroxide and peracetic acid in the disinfection of an advanced primary treatment effluent.
Environ Technol. 2008 Nov; 29(11):1209-17.ET

Abstract

This paper evaluates the efficacy of hydrogen peroxide (HP) and peracetic acid (PAA) in the disinfection of an Advanced Primary Treatment (APT) effluent, and how said disinfection capacities can be enhanced by combining the oxidants with copper (Cu2+) and silver (Ag). The treatment sequence consisted of APT (adding chemicals to water to remove suspended solids by coagulation and flocculation), followed by disinfection with various doses of HP, HP+Cu2+, HP+Ag, PAA and PAA+Ag. Microbiological quality was determined by monitoring concentrations of fecal coliforms (FC), pathogenic bacteria (PB) and helminth eggs (HE) throughout the sequence. The results revealed that APT effluent still contains very high levels of bacteria as the treatment only removes 1-2 log of FC and PB, but the reduction in the number of viable helminth eggs was 83%. Subsequent disinfection stages demonstrated that both HP+Cu2+ and HP+Ag have a marked disinfection capacity for bacteria (3.9 and 3.4 log-inactivation, respectively). Peracetic acid on its own was already extremely efficient at disinfecting for bacteria, and the effect was enhanced when combining PAA with silver (PAA+Ag). The best result for HE removal was achieved by combining PAA with silver (PAA+Ag) at doses of 20 + 2.0 mg l(-1), respectively. The study concluded that the PAA+Ag and HP+Ag combinations were good alternatives for APT effluent disinfection, because the disinfected effluents met the standards in NOM-001-SEMARNAT-1996, Mexico's regulation governing the microbiological quality required in treated wastewater destined for unrestricted reuse in agricultural irrigation (< or =1 helminths per litre). Combining either of these disinfection treatments with a primary method such as APT, therefore, offers an effective and practical way of reducing the health risks normally associated with the reuse of wastewaters.

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Authors+Show Affiliations

Orta De Velásquez MT
Instituto de Ingeniería, Universidad Nacional Autónoma de México, Ap. 70-472, Coyoacán, C.P. 04510, DF Mexico. mortal@iingen.unam.mx
Yáñez-Noguez I
No affiliation info available
Jiménez-Cisneros B
No affiliation info available
Luna Pabello VM
No affiliation info available

MeSH

AgricultureAnimalsBacteriaCopperDisinfectantsDisinfectionHelminthsHydrogen PeroxideMexicoPeracetic AcidSilverWaste Disposal, FluidWater MicrobiologyWater PollutantsWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18975853

Citation

Orta De Velásquez, M T., et al. "Adding Silver and Copper to Hydrogen Peroxide and Peracetic Acid in the Disinfection of an Advanced Primary Treatment Effluent." Environmental Technology, vol. 29, no. 11, 2008, pp. 1209-17.
Orta De Velásquez MT, Yáñez-Noguez I, Jiménez-Cisneros B, et al. Adding silver and copper to hydrogen peroxide and peracetic acid in the disinfection of an advanced primary treatment effluent. Environ Technol. 2008;29(11):1209-17.
Orta De Velásquez, M. T., Yáñez-Noguez, I., Jiménez-Cisneros, B., & Luna Pabello, V. M. (2008). Adding silver and copper to hydrogen peroxide and peracetic acid in the disinfection of an advanced primary treatment effluent. Environmental Technology, 29(11), 1209-17. https://doi.org/10.1080/09593330802270632
Orta De Velásquez MT, et al. Adding Silver and Copper to Hydrogen Peroxide and Peracetic Acid in the Disinfection of an Advanced Primary Treatment Effluent. Environ Technol. 2008;29(11):1209-17. PubMed PMID: 18975853.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adding silver and copper to hydrogen peroxide and peracetic acid in the disinfection of an advanced primary treatment effluent. AU - Orta De Velásquez,M T, AU - Yáñez-Noguez,I, AU - Jiménez-Cisneros,B, AU - Luna Pabello,V M, PY - 2008/11/4/pubmed PY - 2009/1/15/medline PY - 2008/11/4/entrez SP - 1209 EP - 17 JF - Environmental technology JO - Environ Technol VL - 29 IS - 11 N2 - This paper evaluates the efficacy of hydrogen peroxide (HP) and peracetic acid (PAA) in the disinfection of an Advanced Primary Treatment (APT) effluent, and how said disinfection capacities can be enhanced by combining the oxidants with copper (Cu2+) and silver (Ag). The treatment sequence consisted of APT (adding chemicals to water to remove suspended solids by coagulation and flocculation), followed by disinfection with various doses of HP, HP+Cu2+, HP+Ag, PAA and PAA+Ag. Microbiological quality was determined by monitoring concentrations of fecal coliforms (FC), pathogenic bacteria (PB) and helminth eggs (HE) throughout the sequence. The results revealed that APT effluent still contains very high levels of bacteria as the treatment only removes 1-2 log of FC and PB, but the reduction in the number of viable helminth eggs was 83%. Subsequent disinfection stages demonstrated that both HP+Cu2+ and HP+Ag have a marked disinfection capacity for bacteria (3.9 and 3.4 log-inactivation, respectively). Peracetic acid on its own was already extremely efficient at disinfecting for bacteria, and the effect was enhanced when combining PAA with silver (PAA+Ag). The best result for HE removal was achieved by combining PAA with silver (PAA+Ag) at doses of 20 + 2.0 mg l(-1), respectively. The study concluded that the PAA+Ag and HP+Ag combinations were good alternatives for APT effluent disinfection, because the disinfected effluents met the standards in NOM-001-SEMARNAT-1996, Mexico's regulation governing the microbiological quality required in treated wastewater destined for unrestricted reuse in agricultural irrigation (< or =1 helminths per litre). Combining either of these disinfection treatments with a primary method such as APT, therefore, offers an effective and practical way of reducing the health risks normally associated with the reuse of wastewaters. SN - 0959-3330 UR - https://www.unboundmedicine.com/medline/citation/18975853/Adding_silver_and_copper_to_hydrogen_peroxide_and_peracetic_acid_in_the_disinfection_of_an_advanced_primary_treatment_effluent_ L2 - https://www.tandfonline.com/doi/full/10.1080/09593330802270632 DB - PRIME DP - Unbound Medicine ER -