The Impact of Alum on the Bulking of a Full Scale Activated Sludge Plant

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Abstract

The activated sludge plant (ASP) is one of the main wastewater treatment processes in the UK. With the increasing stringent requirement for effluent quality, there has been a considerable increase in the use of chemicals for phosphorus precipitation in ASPs to achieve effluent consents. Alum is one of the most widely used chemicals in the treatment of wastewater. In this study, we examine the impact of varying concentrations of alum on the bulking and settleability of a full-scale activated sludge plant with simultaneous co-precipitation. The results showed an improvement in the settleability of the activated sludge with the initial stirred sludge volume index (SSVI) before alum dosing dropping from 105 to 85 after one sludge age. The SSVI increased to 155 with the settleability and floc compactability deteriorating at a dose rate of 145mg/L of alum. The bulking of the sludge was caused by a combination of the filaments present and the surface chemistry of the activated sludge flocs.

Publisher Statement - This paper and others from the same conference can be found from the Seek Digital Library www.seekdl.org
Original languageEnglish
Title of host publicationProceedings of the fourth International Conference on Advances in Bio-Informatics and Environmental Engineering - ICABEE 2016
Subtitle of host publicationICABEE 2016
PublisherIRED
Pages53 - 57
Number of pages5
ISBN (Electronic)978163248011
DOIs
Publication statusPublished - 8 Jun 2016
EventFourth International Conference on Advances in Bio-Informatics and Environmental Engineering - ICABEE 2016 - Rome, Italy
Duration: 18 Aug 201619 Aug 2016
Conference number: 4

Conference

ConferenceFourth International Conference on Advances in Bio-Informatics and Environmental Engineering - ICABEE 2016
CountryItaly
CityRome
Period18/08/1619/08/16

Keywords

  • Activated Sludge
  • Settleability
  • FST
  • Bulking

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  • Cite this

    Ojo, P., & Ifelebuegu, A. (2016). The Impact of Alum on the Bulking of a Full Scale Activated Sludge Plant. In Proceedings of the fourth International Conference on Advances in Bio-Informatics and Environmental Engineering - ICABEE 2016 : ICABEE 2016 (pp. 53 - 57). IRED. https://doi.org/10.15224/978-1-63248-100-9-57