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http://dx.doi.org/10.11001/jksww.2020.34.3.183

Application of high voltage pulse for reduction of membrane fouling in membrane bio-reactor and kinetic approach to fouling rate reduction  

Kim, Kyeong-Rae (Department of Environmental Engineering, Hoseo University)
Kim, Wan-Kyu (Department of Convergence Technology for Safety and Environment, Hoseo University)
Chang, In-Soung (Department of Environmental Engineering, Hoseo University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.34, no.3, 2020 , pp. 183-190 More about this Journal
Abstract
Although membrane bio-reactor (MBR) has been widely applied for wastewater treatment plants, the membrane fouling problems are still considered as an obstacle to overcome. Thus, many studies and commercial developments on mitigating membrane fouling in MBR have been carried out. Recently, high voltage impulse (HVI) has gained attention for a possible alternative technique for desalting, non-thermal sterilization, bromate-free disinfection and mitigation of membrane fouling. In this study, it was verified if the HVI could be used for mitigation of membrane fouling, particularly the internal pore fouling in MBR. The HVI was applied to the fouled membrane under different conditions of electric fields (E) and contact time (t) of HVI in order to investigate how much of internal pore fouling was reduced. The internal pore fouling resistance (Rf) after HVI induction was reduced as both E and t increased. For example, Rf decreased by 19% when the applied E was 5 kV/cm and t was 80 min. However, the Rf decreased by 71% as the E increased to 15 kV/cm under the same contact time. The correlation between E and t that needed for 20% of Rf reduction was modeled based on kinetics. The model equation, E1.54t = 1.2 × 103 was obtained by the membrane filtration data that were obtained with and without HVI induction. The equation states the products of En and t is always constant, which means that the required contact time can be reduced in accordance with the increase of E.
Keywords
Membrane Bio-Reactor(MBR); Membrane fouling; Modeling; Resistance; Activated sludge;
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