Degradation of Nonylphenol Polyethoxylates and its Microflora Structure in an Anoxic-Oxic Activated Sludge Process

Yuan Hua Xie; Tong Zhu; Xiao Jiang Liu; Hui Liu; Jin Han

doi:10.4028/www.scientific.net/AMR.610-613.331

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 610-613Degradation of Nonylphenol Polyethoxylates and its...

Degradation of Nonylphenol Polyethoxylates and its Microflora Structure in an Anoxic-Oxic Activated Sludge Process

Abstract:

An anoxic-oxic activated sludge process (AOASP) was carried out to degrade nonylphenol polyethoxylates (NPEOs). The carbon source in influent was replaced stepwise by a mixture of nonylphenol decaethoxylate (M-NP10EO). The 2nd-derivative UV-spectrometry was applied to determine the total amount of M-NP10EO in water samples. Chemical oxygen demand (COD) removal efficiency achieves about 85% under the highest M-NP10EO loading rate, and M-NP10EO removal efficiency is about 80%. Denaturing gradient gel electrophoresis (DGGE) results of activated sludges show that the microbe species decrease but gradually stabilize with the increase of M-NP10EO concentration in influent. Fluorescence in situ hybridization (FISH) results of activated sludges showe that the dominant microflora under the highest M-NP10EO loading rate is β-Proteobacteria (35%), followed by α-Proteobacteria (15%), γ-Proteobacteria (5%) and Actinobateria (4%).

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Periodical:

Advanced Materials Research (Volumes 610-613)

Pages:

331-336

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.610-613.331

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Online since:

December 2012

Authors:

Yuan Hua Xie, Tong Zhu, Xiao Jiang Liu, Hui Liu, Jin Han

Keywords:

Anoxic-Oxic Activated Sludge Process, Degradation, Denaturing Gradient Gel Electrophoresis, Fluorescence in Situ Hybridization, Microflora Structure, Nonylphenol Polyethoxylates

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