Research Papers by Kyu-Hong Ahn

Biological nutrient removal and the fate of two estrogenic compounds, bisphenol A (BPA) and 2,4-dicholorophenol (2,4-DCP) were studied using a sequencing anoxic/anaerobic-aerobic membrane bioreactor (SAM) which was fed with synthetic water and operated at SRT of 60 days. Total nitrogen (TN), total p

This study was conducted to investigate the characteristics of membrane fouling and removal of phosphorous in a membrane bioreactor process by addition of inorganic coagulants directly into aerobic tank of a pre-anoxic nutrient removal system. In order to determine the specific cake resistance of ac

In this study, a mathematical model has been developed for the submerged membrane bioreactor (SMBR) combining the activated sludge model No.1 (ASM1) with a membrane fouling model. The ASM1 was modified to take account into biological characteristics of the SMBR process, and the resistance-in-series

This study was conducted to evaluate the applicability of microfiltration in treating domestic wastewater for reuse. A hollow fiber microfiltration membrane was used in the pilot test. The pore size of the membrane was 0.1 m and effective surface area was 20 m2. The maximum capacity of the pilot pla

Most of the municipal sewage treatment plants (MSTPs) being operated in Korea were designed for wastewater with average concentrations of municipal sewage. However, they are in fact being operated at low organic loading. Thus, most of the secondary small-scale sewage treatment plant cannot satisfy t

An intermittently aerated membrane bioreactor using a submerged hollow fiber membrane was applied in laboratory scale to treat household wastewater including toilet flushing water. Nitrogen removal was optimized with intermittent aeration of the reactor and adjusting the time lengths of anoxic and a