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Table 2

Method for identification of clogging

MethodAdvantageDisadvantage
Permeability coefficient measurement 
  • Can be well controlled and easily executed in the laboratory (Siegrist 1987; Ganot et al. 2017).

 
  • The low cohesive medium prevents the withdrawal of undisturbed samples (Siegrist 1987; Matos et al. 2019).

  • No comparability between different configurations and operation conditions (Ganot et al. 2017; Sobotkova et al. 2018).

 
Tracer experiment 
  • Reveals the water flow conditions and is suitable for different configurations (Hübner et al. 2013).

 
  • The complete decay time and its toxicity on microorganisms are yet to be revealed (Lancheros et al. 2017; Matos et al. 2019; Li et al. 2020).

 
Numerical simulation 
  • The influencing factors considered are continuously improved (Samsó & García 2014; Coulon et al. 2015; Pei et al. 2018).

 
  • Few have been successfully applied in large-scale clogging predictions (Ganot et al. 2017; Pucher & Langergraber 2019).

  • The accuracy is restricted by complex factors (Coulon et al. 2015).

 
  • Measurement of electrical resistivity

 
  • Easy to operate in the laboratory and online (Liu et al. 2018a, 2018b).

 
  • Requires sophisticated equipment and has less indications for obstruction caused by organic compounds (Zhao et al. 2009).

 
MethodAdvantageDisadvantage
Permeability coefficient measurement 
  • Can be well controlled and easily executed in the laboratory (Siegrist 1987; Ganot et al. 2017).

 
  • The low cohesive medium prevents the withdrawal of undisturbed samples (Siegrist 1987; Matos et al. 2019).

  • No comparability between different configurations and operation conditions (Ganot et al. 2017; Sobotkova et al. 2018).

 
Tracer experiment 
  • Reveals the water flow conditions and is suitable for different configurations (Hübner et al. 2013).

 
  • The complete decay time and its toxicity on microorganisms are yet to be revealed (Lancheros et al. 2017; Matos et al. 2019; Li et al. 2020).

 
Numerical simulation 
  • The influencing factors considered are continuously improved (Samsó & García 2014; Coulon et al. 2015; Pei et al. 2018).

 
  • Few have been successfully applied in large-scale clogging predictions (Ganot et al. 2017; Pucher & Langergraber 2019).

  • The accuracy is restricted by complex factors (Coulon et al. 2015).

 
  • Measurement of electrical resistivity

 
  • Easy to operate in the laboratory and online (Liu et al. 2018a, 2018b).

 
  • Requires sophisticated equipment and has less indications for obstruction caused by organic compounds (Zhao et al. 2009).

 
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