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North American performance experience with anoxic and anaerobic selectors for activated sludge bulking control.

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Title: North American performance experience with anoxic and anaerobic selectors for activated sludge bulking control.
Authors: Parker, D.1, Appleton, R.1, Bratby, J.1, Melcer, H.1
Source: Water Science & Technology. 2004, Vol. 50 Issue 7, p221-228. 8p.
Subjects: Sewage purification, Effluent quality, Water quality, Sewage disposal plants, Factory design & construction
Abstract: Obtaining reliably high compaction characteristics and low SVI values has enormous economic consequences on activated sludge plant design and operation. Now that use of selectors has become more common for achieving low SVI values, the assessment of the full-scale performance characteristics of activated sludge plants incorporating selectors has high value for the design and operation of future plants. Treatment plant effluent quality is seldom analyzed solely on an average basis and the impact peak events have on effluent quality must be considered in design and operation. Descriptive statistics should also be used to assess selector performance, so that the influence of infrequently occurring values on plant design and operation can be assessed. The performance of 21 activated sludge plants incorporating selectors was evaluated. All the selector plants for which post installation data were available showed that the operating SVI values were significantly improved. One plant studied in detail showed that final effluent quality was significantly better after the selector installation. As a group, activated sludge plants with anaerobic selectors outperform those with anoxic selectors. Dissolved oxygen control is just as important in activated sludge plants with selectors as in conventional activated sludge plants. [ABSTRACT FROM AUTHOR]
Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 26753395
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: North American performance experience with anoxic and anaerobic selectors for activated sludge bulking control.
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  Data: <searchLink fieldCode="JN" term="%22Water+Science+%26+Technology%22">Water Science & Technology</searchLink>. 2004, Vol. 50 Issue 7, p221-228. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Sewage+purification%22">Sewage purification</searchLink><br /><searchLink fieldCode="DE" term="%22Effluent+quality%22">Effluent quality</searchLink><br /><searchLink fieldCode="DE" term="%22Water+quality%22">Water quality</searchLink><br /><searchLink fieldCode="DE" term="%22Sewage+disposal+plants%22">Sewage disposal plants</searchLink><br /><searchLink fieldCode="DE" term="%22Factory+design+%26+construction%22">Factory design & construction</searchLink>
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  Data: Obtaining reliably high compaction characteristics and low SVI values has enormous economic consequences on activated sludge plant design and operation. Now that use of selectors has become more common for achieving low SVI values, the assessment of the full-scale performance characteristics of activated sludge plants incorporating selectors has high value for the design and operation of future plants. Treatment plant effluent quality is seldom analyzed solely on an average basis and the impact peak events have on effluent quality must be considered in design and operation. Descriptive statistics should also be used to assess selector performance, so that the influence of infrequently occurring values on plant design and operation can be assessed. The performance of 21 activated sludge plants incorporating selectors was evaluated. All the selector plants for which post installation data were available showed that the operating SVI values were significantly improved. One plant studied in detail showed that final effluent quality was significantly better after the selector installation. As a group, activated sludge plants with anaerobic selectors outperform those with anoxic selectors. Dissolved oxygen control is just as important in activated sludge plants with selectors as in conventional activated sludge plants. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.2166/wst.2004.0463
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 221
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      – SubjectFull: Sewage purification
        Type: general
      – SubjectFull: Effluent quality
        Type: general
      – SubjectFull: Water quality
        Type: general
      – SubjectFull: Sewage disposal plants
        Type: general
      – SubjectFull: Factory design & construction
        Type: general
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      – TitleFull: North American performance experience with anoxic and anaerobic selectors for activated sludge bulking control.
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            NameFull: Appleton, R.
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            NameFull: Bratby, J.
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              M: 10
              Text: 2004
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              Y: 2004
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