Model-based analysis of the effect of different operating conditions on fouling mechanisms in a membrane bioreactor

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• 作者：Gianpaolo Sabia ; Marco Ferraris…
• 关键词：Membrane bioreactor ; Monitoring ; Transmembrane pressure ; Filtration ; Model ; Fouling mechanism
• 刊名：Environmental Science and Pollution Research
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：23
• 期：2
• 页码：1598-1609
• 全文大小：1,856 KB
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• 作者单位：Gianpaolo Sabia (1)
  Marco Ferraris (1)
  Alessandro Spagni (1)
  
  1. ENEA, Water Resources Management Laboratory, via M.M. Sole, 4, 40129, Bologna, Italy
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

This study proposes a model-based evaluation of the effect of different operating conditions with and without pre-denitrification treatment and applying three different solids retention times on the fouling mechanisms involved in membrane bioreactors (MBRs). A total of 11 fouling models obtained from literature were used to fit the transmembrane pressure variations measured in a pilot-scale MBR treating real wastewater for more than 1 year. The results showed that all the models represent reasonable descriptions of the fouling processes in the MBR tested. The model-based analysis confirmed that membrane fouling started by pore blocking (complete blocking model) and by a reduction of the pore diameter (standard blocking) while cake filtration became the dominant fouling mechanism over long-term operation. However, the different fouling mechanisms occurred almost simultaneously making it rather difficult to identify each one. The membrane “history” (i.e. age, lifespan, etc.) seems the most important factor affecting the fouling mechanism more than the applied operating conditions. Nonlinear regression of the most complex models (combined models) evaluated in this study sometimes demonstrated unreliable parameter estimates suggesting that the four basic fouling models (complete, standard, intermediate blocking and cake filtration) contain enough details to represent a reasonable description of the main fouling processes occurring in MBRs. Keywords Membrane bioreactor Monitoring Transmembrane pressure Filtration Model Fouling mechanism