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Rapid start-up and improvement of granulation in SBR

Jalali, S ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1186/s40201-015-0188-9
  3. Publisher: BioMed Central Ltd , 2015
  4. Abstract:
  5. Abstract Background: The aim of this study is to accelerate and improve aerobic granulation within a Sequencing Batch Reactor (SBR) by cationic polymer addition. Methods: To identify whether the polymer additive is capable of enhancing granule formation, two SBRs (R1 and R2, each 0.15 m in diameter and 2 m in height) are used by feeding synthetic wastewater. The cationic polymer with concentration of 30 to 2 ppm is added to R2, while no cationic polymer is added to R1. Results: Results show that the cationic polymer addition causes faster granule formation and consequently shorter reactor start-up period. The polymer-amended reactor contains higher concentration of biomass with better settling ability (23% reduction in SVI15) and larger and denser granules (112% increase of granular diameter). In addition, the results demonstrate that the cationic polymer improve the sludge granulation process by 31% increase in Extracellular Polymer Substance(EPS) concentration, 7% increase in Specific Oxygen Uptake Rate(SOUR), 18% increase in hydrophobicity, and 17% reduction in effluent Mixed Liquor Suspended Solid(MLSS) concentration. Conclusions: Concludingly, it is found that using the cationic polymer to an aerobic granular system has the potential to enhance the sludge granulation process
  6. Keywords:
  7. Aerobic granulation ; Cationic polymer ; Rapid granulation ; Cation ; Concentration (composition) ; Oxic conditions ; Polymer ; Sludge ; Wastewater
  8. Source: Journal of Environmental Health Science and Engineering ; Volume 13, Issue 1 , 2015 ; 2052336X (ISSN)
  9. URL: http://jehse.biomedcentral.com/articles/10.1186/s40201-015-0188-9