Comparison of UV, Peracetic Acid and Sodium Hypochlorite Treatment in the Disinfection of Urban Wastewater

Pathogens

Giulia Amagliani¹  Giorgio Brandi¹  Giorgio Gilli²  Sara Bonetta²  Elisabetta Carraro²  Cristina Pignata²  Silvia Bonetta³ 

[1] Dipartimento di Scienze Biomolecolari, Università degli Studi di Urbino “Carlo Bo”, 61029 Urbino, Italy;Dipartimento di Scienze della Sanità Pubblica e Pediatriche, Università di Torino, 10126 Torino, Italy;Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, 10123 Torino, Italy;

关键词: wastewater;    disinfection;    Campylobacter;    Salmonella spp.;    E. coli O157:H7;    STEC;   

DOI  :  10.3390/pathogens10020182

来源: DOAJ

【 摘 要 】

One source of water contamination is the release of wastewater that has not undergone efficient treatment. The aim of this study was to evaluate the reduction obtained with sodium hypochlorite (NaClO), UV and peracetic acid disinfection treatment of Salmonella spp., pathogenic Campylobacter, STEC and bacterial indicators in three full-scale municipal wastewater plants. A general reduction in Salmonella was observed after disinfection, but these bacteria were detected in one UV-treated sample (culture method) and in 33%, 50% and 17% of samples collected after NaClO, UV and PAA disinfection treatments, respectively (PCR method). A better reduction was also observed under NaClO disinfection for the microbial indicators. Independent of the disinfection treatment, E. coli O157:H7 was not detected in the disinfected samples, whereas some samples treated with UV and PAA showed the presence of the stx1 gene. No reduction in the presence of stx2 genes was verified for any of the disinfection treatments. Campylobacter was not detected in any of the analysed samples. The overall results highlight a better reduction in microbiological parameters with a NaClO disinfection treatment in a full-scale municipal wastewater plant compared with UV and PAA. However, the results indicate that a complete and specific monitoring program is necessary to prevent a possible risk to public health.

【 授权许可】

Unknown