Control of Microthrix parvicella growth in activated sludge
Effects of aerobic and anaerobic conditions on the growth of Microthrix parvicella in the activated sludge were studied to prevent bulking caused by this filamentous bacterium. The study was conducted on a pilot plant with selector and the data were compared with those observed in a full scale plant...
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| Veröffentlicht in: | FEMS microbiology ecology 1993-08, Vol.12 (4), p.277-283 |
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| container_title | FEMS microbiology ecology |
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| creator | Madoni, Paolo Davoli, Donatella |
| description | Effects of aerobic and anaerobic conditions on the growth of Microthrix parvicella in the activated sludge were studied to prevent bulking caused by this filamentous bacterium. The study was conducted on a pilot plant with selector and the data were compared with those observed in a full scale plant subjected to severe bulking due to a massive growth of M. parvicella. Both plants were fed with the same settled waste water. A substantial suppression of the growth of M. parvicella was observed in only the experiments where returned activated sludge was mixed with waste water under aerobic conditions. Both the number of filaments and the sludge volume index (SVI) were lower in the pilot plant than in the full scale plant. Under anerobic conditions, the selector was not able to improve the settleability and avoid the growth of M. parvicella. |
| doi_str_mv | 10.1111/j.1574-6941.1993.tb00040.x |
| format | Article |
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The study was conducted on a pilot plant with selector and the data were compared with those observed in a full scale plant subjected to severe bulking due to a massive growth of M. parvicella. Both plants were fed with the same settled waste water. A substantial suppression of the growth of M. parvicella was observed in only the experiments where returned activated sludge was mixed with waste water under aerobic conditions. Both the number of filaments and the sludge volume index (SVI) were lower in the pilot plant than in the full scale plant. Under anerobic conditions, the selector was not able to improve the settleability and avoid the growth of M. parvicella.</description><identifier>ISSN: 0168-6496</identifier><identifier>EISSN: 1574-6941</identifier><identifier>DOI: 10.1111/j.1574-6941.1993.tb00040.x</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Activated sludge process ; Aerobic and anaerobic conditions ; Biological and medical sciences ; Biological treatment of waters ; Biotechnology ; Bulking ; Environment and pollution ; Filamentous bacteria ; Fundamental and applied biological sciences. Psychology ; Industrial applications and implications. 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The study was conducted on a pilot plant with selector and the data were compared with those observed in a full scale plant subjected to severe bulking due to a massive growth of M. parvicella. Both plants were fed with the same settled waste water. A substantial suppression of the growth of M. parvicella was observed in only the experiments where returned activated sludge was mixed with waste water under aerobic conditions. Both the number of filaments and the sludge volume index (SVI) were lower in the pilot plant than in the full scale plant. Under anerobic conditions, the selector was not able to improve the settleability and avoid the growth of M. parvicella.</description><subject>Activated sludge process</subject><subject>Aerobic and anaerobic conditions</subject><subject>Biological and medical sciences</subject><subject>Biological treatment of waters</subject><subject>Biotechnology</subject><subject>Bulking</subject><subject>Environment and pollution</subject><subject>Filamentous bacteria</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Industrial applications and implications. 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| fulltext | fulltext |
| identifier | ISSN: 0168-6496 |
| ispartof | FEMS microbiology ecology, 1993-08, Vol.12 (4), p.277-283 |
| issn | 0168-6496 1574-6941 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_16909360 |
| source | Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Oxford University Press Journals Digital Archive Legacy; Oxford Journals Open Access Collection |
| subjects | Activated sludge process Aerobic and anaerobic conditions Biological and medical sciences Biological treatment of waters Biotechnology Bulking Environment and pollution Filamentous bacteria Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Microthrix parvicella |
| title | Control of Microthrix parvicella growth in activated sludge |
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