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The potential use of shear viscosity to monitor polymer conditioning of sewage sludge digestates

Oliveira, I. ; Reed, J.P. ; Abu-Orf, M. ; Wilson, V. ; Jones, D. ; Esteves, S.R.

Water research (Oxford), 2016-11, Vol.105, p.320-330 [Periódico revisado por pares]

England: Elsevier Ltd

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  • Título:
    The potential use of shear viscosity to monitor polymer conditioning of sewage sludge digestates
  • Autor: Oliveira, I. ; Reed, J.P. ; Abu-Orf, M. ; Wilson, V. ; Jones, D. ; Esteves, S.R.
  • Assuntos: Anaerobic digestion ; Anaerobiosis ; Bioreactors ; Conditioning ; Conditioning requirements ; Correlation analysis ; Dewatering ; Digestate management ; Digested sewage sludge ; Monitors ; Parameters ; Polymer dose monitoring ; Polymers ; Regression ; Rheological characteristics ; Sewage ; Shear viscosity ; Storage conditions ; Viscosity
  • É parte de: Water research (Oxford), 2016-11, Vol.105, p.320-330
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: The work assessed the use of shear viscosity at 0.1 s−1 (η[0.1s−1]) as a parameter to detect changes in the conditioning and dewatering of digestates. Total and soluble fractions of organic matter of digestate samples before and after storage were also assessed in regards to their conditioning and dewatering performance. Digestate from a conventional mesophilic anaerobic digestion (CMAD) and advanced anaerobic digestion (AAD) plants were used. Linear regression and correlation analysis of 29 different parameters showed that soluble and total fractions of organic matter (Norg, Sc, Sp, Tp, TKN/COD, tCOD and sCOD) during plant operation and storage conditions correlated (r between 0.80 and 0.99) with the variation in polymer dose, floc strength and CST of conditioned digestate samples. The variations occurred within the content of soluble and total fractions of organic matter, and showed to correlate with both conditioning requirements and the variation in η[0.1s−1]. The work concluded that η[0.1s−1] measurements of unconditioned digestate samples have the potential to be used as a parameter to monitor conditioning requirements during digestate storage or during process changes. It was found important to analyse soluble and total fractions of organic matter in order to understand the changes in η[0.1s−1] within specific process conditions. [Display omitted] •Storage conditions influenced conditioning requirements of digestates.•Polymer conditioning increases with η[0.1s−1] upon digestate storage.•Organic matter and η[0.1s−1] influenced digestate conditioning requirements.
  • Editor: England: Elsevier Ltd
  • Idioma: Inglês
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