Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
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SHR Neuro Krebs Kardio Lipid Stoffw Microb
Racyte, J; Bernard, S; Paulitsch-Fuchs, AH; Yntema, DR; Bruning, H; Rijnaarts, HH.
Alternating electric fields combined with activated carbon for disinfection of Gram negative and Gram positive bacteria in fluidized bed electrode system.
Water Res. 2013; 47(16): 6395-6405.
Doi: 10.1016/j.watres.2013.08.011
Web of Science
PubMed
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- Co-Autor*innen der Med Uni Graz
- Paulitsch-Fuchs Astrid Helga
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- Abstract:
- Strong electric fields for disinfection of wastewaters have been employed already for several decades. An innovative approach combining low strength (7 V/cm) alternating electric fields with a granular activated carbon fluidized bed electrode (FBE) for disinfection was presented recently. For disinfection performance of FBE several pure microbial cultures were tested: Bacillus subtilis, Bacillus subtilis subsp. subtilis, Enterococcus faecalis as representatives from Gram positive bacteria and Erwinia carotovora, Pseudomonas luteola, Pseudomonas fluorescens and Escherichia coli YMc10 as representatives from Gram negative bacteria. The alternating electric field amplitude and shape were kept constant. Only the effect of alternating electric field frequency on disinfection performance was investigated. From the bacteria tested, the Gram negative strains were more susceptible and the Gram positive microorganisms were more resistant to FBE disinfection. The collected data indicate that the efficiency of disinfection is frequency and strain dependent. During 6 h of disinfection, the decrease above 2 Log units was achieved with P. luteola and E. coli at 10 kHz and at dual frequency shift keying (FSK) modulated signal with frequencies of 10 kHz and 140 kHz. FBE technology appears to offer a new way for selective bacterial disinfection, however further optimizations are needed on treatment duration, and energy input, to improve effectiveness. Copyright © 2013 Elsevier Ltd. All rights reserved.
- Find related publications in this database (using NLM MeSH Indexing)
- Anti-Bacterial Agents - pharmacology
- Charcoal - pharmacology
- Electromagnetic Phenomena -
- Gram-Negative Bacteria - drug effects Gram-Negative Bacteria - radiation effects
- Gram-Positive Bacteria - drug effects Gram-Positive Bacteria - radiation effects
- Water Purification - methods
- Find related publications in this database (Keywords)
- Alternating electric field
- Frequency
- Granular activated carbon
- Disinfection
- Gram positive bacteria
- Gram negative bacteria