Combined Sewer Overflow pretreatment with chemical coagulation and a particle settler for improved peracetic acid disinfection

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Abstract

Full scale disinfection by peracetic acid (PAA) was achieved on Combined Sewer Overflow (CSO) water, which was pre-treated physically by a fast settling-filtration unit. Disinfection of untreated CSO water using PAA was compared to treatment using a particle separator (HydroSeparator®) and additional coagulation with poly-aluminum-chloride. Disinfection for Enterococcus increased with the applied dose of PAA and additional improvement was achieved when it was preceded by chemical coagulation with 5 mg L−1 poly-aluminum-chloride. When Enterococcus was reduced by treatment in the HydroSeparator, followed by PAA treatment during a CSO event, the treatment was sufficient to maintain microbial quality in the recipient water.
Original languageEnglish
JournalJournal of Industrial and Engineering Chemistry
Volume37
Pages (from-to)372-379
ISSN1226-086X
DOIs
Publication statusPublished - 2016

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