Research Papers by Chung-hak Lee

The significance of dissolved organic matter (DOMs) in membrane fouling has been also increasingly noted in desalination plants using reverse osmosis (RO) and nanofiltration (NF). Nevertheless, little information is available on the interactions between DOM and other foulants such as inorganic scale

The role of EPS is not clear to date. A literature review suggests that its importance is greater at lower SRTs and during unsteady operation. Fluctuating levels of dissolved oxygen and nitrate appear to have a profound impact on EPS uptake rate and thereby on EPS concentration. However, higher diss

A theoretical model to predict the porosity and specific resistance of cake layer was developed for better understanding a coagulation-microfiltration system for drinking water production. The model was based on fractal theory and incorporated intra-floc and inter-floc porosities as well as cake col

In this study, hydrodynamics and physiology of microorganisms were investigated in a new type membrane bioreactor, MHCR, which is a membrane coupled HCR (High performance Compact Reactor) having very high COD removal efficiency. The degree of interference caused by inserting a submerged membrane was

The performance of nanofiltration (NF) with the addition of poly (acrylic acid) (PAA) for treatment of strontiumbearing nuclear wastewater was investigated using different NF membranes at various pH levels and PAA/Sr ratios. Greater Sr removal at elevated pH was attributed to the formation of SrCO3(

Coagulation with only rapid mixing in a separate tank (ordinary coagulation) and coagulation with no mixing tank (in-line coagulation) were applied prior to ultrafiltration with an inside-out type hollow fiber membrane. In result the filterability at the former conditions was superior in both the cr