Paper Title:
Characteristics of Extracellular Polymeric Substances (EPS) and Enzymes during the Aerobic/anoxic Digestion of Sewage Sludge after Ultrasonic Pretreatment
  Abstract

In this paper, ultrasonic pretreatment was used to improve the aerobic/anoxic digestion of sewage sludge. The extracellular polymeric substances (EPS) and enzymes in the digestion were analysed to understand the mechanisms responsible for this improvement. The results showed that the ultrasonic pretreatment enhanced enzymatic activities and accelerated the solubilisation of the EPS. In addition, ultrasonic pretreatment could not only break flocs and release extracellular materials but also destroy cells and release intercellular materials. With ultrasonic pretreatment, the sludge reduction for volatile suspend solids (VSS) in aerobic/anoxic digestion was 41.97±0.66%, compared with 22.81±1.40% for the control treatment, after an aerobic/anoxic digestion time of 10 d. Fourier transform infrared (FT-IR) spectroscopy results showed that the polymeric compounds, proteins and polysaccharides were easily hydrolysed and biodegraded in ultrasonic-treated sludge.

  Info
Periodical
Advanced Materials Research (Volumes 347-353)
Chapter
Chapter 3: Development and Utilization of Wind Energy
Edited by
Weiguo Pan, Jianxing Ren and Yongguang Li
Pages
2008-2014
DOI
10.4028/www.scientific.net/AMR.347-353.2008
Citation
L. Zheng, S. Y. Sun, Y. B. Xu, B. J. Liu, W. T. Yao, M. S. Cai, W. J. Tong, "Characteristics of Extracellular Polymeric Substances (EPS) and Enzymes during the Aerobic/anoxic Digestion of Sewage Sludge after Ultrasonic Pretreatment", Advanced Materials Research, Vols. 347-353, pp. 2008-2014, 2012
Online since
October 2011
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Price
$32.00
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