Journal
JOURNAL OF ENVIRONMENTAL SCIENCES
Volume 26, Issue 6, Pages 1238-1242Publisher
SCIENCE PRESS
DOI: 10.1016/S1001-0742(13)60594-X
Keywords
antibiotic resistance; ozonation; catalyst; oxidants; disinfection
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Funding
- National Research Foundation of Korea - Ministry of Education, Science and Technology [2012-0003505]
- Korea Ministry of Environment [GT-11-B-01-005-1]
- Korea Environmental Industry & Technology Institute (KEITI) [ARQ201205008003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2011-0014511] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study compared three different disinfection processes (chlorination, E-beam, and ozone) and the efficacy of three oxidants (H2O2, S2O8-, and peroxymonosulfate (MPS)) in removing antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in a synthetic wastewater. More than 30 mg/L of chlorine was needed to remove over 90% of ARB and ARG. For the E-beam method, only 1 dose (kGy) was needed to remove ARB and ARG, and ozone could reduce ARB and ARG by more than 90% even at 3 mg/L ozone concentration. In the ozone process, CT values (concentration x time) were compared for ozone alone and combined with different catalysts based on the 2-log removal of ARB and ARG. Ozone treatment yielded a value of 31 and 33 (mg.min)/L for ARB and ARGs respectively. On the other hand, ozone with persulfate yielded 15.9 and 18.5 (mg.min)/L while ozone with monopersulfate yielded a value of 12 and 14.5 (mg.min)/L. This implies that the addition of these catalysts significantly reduces the contact time to achieve a 2-log removal, thus enhancing the process in terms of its kinetics.
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