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Control of Microthr...
Control of Microthrix parvicella and sludge bulking by ozone in a full-scale WWTP
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- Leven, Lotta (författare)
- RISE,JTI Institutet för Jordbruks- och Miljöteknik,Swedish Institute of Agricultural and Environmental Engineering (JTI)
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- Wijnbladh, Erik (författare)
- SLU Swedish University of Agricultural Sciences, Sweden
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- Tuvesson, Malin (författare)
- SYVAB Himmerfjärdsverket, Sweden
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- Kragelund, Caroline (författare)
- Aalborg University, Denmark; Danish Technological Institute, Denmark
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- Hallin, Sara (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mikrobiologi,Department of Microbiology,SLU Swedish University of Agricultural Sciences, Sweden
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(creator_code:org_t)
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- 2015-11-03
- 2016
- Engelska.
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Ingår i: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 73:4, s. 866-872
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.2...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- Bulking and rising sludge are common problems in wastewater treatment plants (WWTPs) and are primarily caused by increased growth of filamentous bacteria such as Microthrix parvicella. It has a negative impact on sludge settling properties in activated sludge (AS) process, in addition to being responsible for foam formation. Different methods can be used to control sludge bulking. The aim of this study was to evaluate the dosage of on-site generated ozone in the recycled AS flow in a fullscale WWTP having problems caused by M. parvicella. The evaluation of the experiment was assessed by process data, microscopic analysis and microbial screening on the experimental and control line before, during and after the period of ozone dosage. The ozone treatment resulted in decreased abundance of M. parvicella and improved the settling properties, without impairing the overall process performance. Both chemical oxygen demand (COD)-and N-removal were unaffected and the dominant populations involved in nitrification, as analysed by fluorescent in situ hybridization, remained during the experimental period. When the ozone treatment was terminated, the problems with sludge bulking reappeared, indicating the importance of continuous evaluation of the process.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Miljöbioteknik -- Vattenbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Biotechnology -- Water Treatment (hsv//eng)
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
Nyckelord
- Activated sludge process
- Filamentous bacteria
- Fluorescent in situ hybridization
- Nitrogen removal
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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