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Investigating fouling at the pore-scale using a microfluidic membrane mimic filtration system.


ABSTRACT: The work investigates fouling in a microfluidic membrane mimic (MMM) filtration system for foulants such as polystyrene particles and large polymeric molecules. Our MMM device consists of a staggered arrangement of pillars which enables real-time visualization and analysis of pore-scale phenomena. Different fouling scenarios are investigated by conducting constant-pressure experiments. Fouling experiments are performed with three different types of foulants: polystyrene particle solution (colloidal fouling), polyacrylamide polymer solution (organic fouling) and a mixture of these two solutions (combined fouling). Four major categories of microscopic fouling are observed: cake filtration (upstream), pore blocking (inside the pores), colloidal aggregation (downstream) and colloidal streamer fouling (downstream). Our microfluidic experiments show that downstream colloidal aggregation and streamer fouling have a significant effect on overall membrane fouling which were not studied before.

SUBMITTER: Debnath N 

PROVIDER: S-EPMC6646390 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Investigating fouling at the pore-scale using a microfluidic membrane mimic filtration system.

Debnath Nandini N   Kumar Aloke A   Thundat Thomas T   Sadrzadeh Mohtada M  

Scientific reports 20190722 1


The work investigates fouling in a microfluidic membrane mimic (MMM) filtration system for foulants such as polystyrene particles and large polymeric molecules. Our MMM device consists of a staggered arrangement of pillars which enables real-time visualization and analysis of pore-scale phenomena. Different fouling scenarios are investigated by conducting constant-pressure experiments. Fouling experiments are performed with three different types of foulants: polystyrene particle solution (colloi  ...[more]

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