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Author:

Yang, Xiong (Yang, Xiong.) | Peng, Yong-Zhen (Peng, Yong-Zhen.) (Scholars:彭永臻) | Song, Ji-Chen (Song, Ji-Chen.) | Wang, Shu-Ying (Wang, Shu-Ying.) (Scholars:王淑莹) | Wang, Jie (Wang, Jie.)

Indexed by:

EI Scopus PKU CSCD

Abstract:

It's still unclear whether the sludge settleability would be affected by the molecule-sizes of carbohydrates. In order to reveal this correlations, long term effects of influent carbohydrates with different molecule-size on sludge settleability were investigated in this study. Three lab-scale sequencing batch reactors were operated by using particulate starch, soluble starch and glucose as the solo carbon source, respectively. The smaller the carbohydrate molecule-size was, the more sensitive the activated sludge was with the environment changing. Therefore, the system would be more easily to suffer with bulking problems when feeding with micro-molecule carbohydrate. The adsorbed particulate carbohydrate would highly increase the sludge settleability in the polymeric carbohydrate-fed system. The SVI was kept lower than 150 mL/g in the glucose-fed system although the PHA production was only about 0.6 mmol C/L. The carbohydrate to protein (C/P) ratio of the extracellular polymeric substances showed positive correlation with SVI. The C/P value increased from 0.248 to 1.201 while the SVI increased from 100to 600mL/g. The dominant filamentous bacteria of the particulate starch-, soluble starch- and glucose-fed system were Type 0041, M. parvicella and S. natans, respectively. Finally, the phosphorous removal efficiency could reach to 80% with glucose as the sole carbon source. ©, 2015, Chinese Society for Environmental Sciences. All right reserved.

Keyword:

Activated sludge process Bacteria Molecules Batch reactors Glucose Carbon Starch Carbohydrates

Author Community:

  • [ 1 ] [Yang, Xiong]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Peng, Yong-Zhen]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Song, Ji-Chen]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Wang, Shu-Ying]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Wang, Jie]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China

Reprint Author's Address:

  • 彭永臻

    [peng, yong-zhen]college of environmental and energy engineering, beijing university of technology, beijing; 100124, china

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Source :

China Environmental Science

ISSN: 1000-6923

Year: 2015

Issue: 2

Volume: 35

Page: 448-456

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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