Toray Chemical Korea

26 Articles found

Articles

indicates free access

  • Control of metal oxide fouling in reverse osmosis

    Control of metal oxide fouling in reverse osmosis

    High levels of iron and manganese, along with large quantities of dissolved gases in the wells created concern for the viability of a conventional desalination design for the proposed City of Camarillo groundwater desalination facility. To identify ...

    Greg Wetterau, Marie Burbano, Lucia McGovern; Evelyn You

  • Chlorine resistant membrane and the mechanism of membrane

    Chlorine resistant membrane and the mechanism of membrane

    Polyamide reverse osmosis membrane used successfully for water desalination is made from the interfacial reaction of meta-phenylenediamine (MPD) with trimesoyl chloride. One problem with the membrane is that its performance is deteriorated upon ...

    Ja-young Koo, Jong Hwa Lee, Yong Doo Jung, Sung Pyo Hong, Sung Ro Yoon

  • Application of chlorine resistant polyamide RO membrane for household water filtration device

    Application of chlorine resistant polyamide RO membrane for household water filtration device

    Chlorine attacks the polyamide RO membrane to cause membrane failure as measured by enhanced passage of both salt and water. For this reason, activated carbon pre-filters that remove chlorine are typically placed ahead of RO membranes in home ...

    Hyung-Gyu Park, Yong-Doo Jung, Sung-Pyo Hong, Ja-Young Koo

  • Chlorine resistant membrane: the mechanism of membrane degradation by chlorine

    Chlorine resistant membrane: the mechanism of membrane degradation by chlorine

    Polyamide reverse osmosis membrane used successfully for water desalination is made from the interfacial reaction of meta-phenylenediamine (MPD) with trimesoyl chloride. One problem with the membrane is that its performance is deteriorated upon ...

    Ja-young Koo*, Jong Hwa Lee, Yong Doo Jung, Sung Pyo Hong and Sung Ro Yoon

  • Control of metal oxide fouling in reverse osmosis

    Control of metal oxide fouling in reverse osmosis

    High levels of iron and manganese, along with large quantities of dissolved gases in the wells created concern for the viability of a conventional desalination design for the proposed City of Camarillo groundwater desalination facility. To identify ...

    E. You, G. Wetterau, M. Burbano, and L. McGovern

  • Water reuse technology trains for medium-level water

    Water reuse technology trains for medium-level water

    Wastewater is considered as stable and substantial amount of alternative water resource. In case of South Korea, it is known that 73.2 percents of supplied water discharge 16 million m3/day of treated effluent from municipal wastewater treatment ...

    Namjung Jang, Xianghao Ren, Jihee Moon, Kwang-Ho Choi, Jaeweon Cho, In S. Kim

  • Foulants analyses for NF membranes with different feed waters

    Foulants analyses for NF membranes with different feed waters

    Two different NF membranes were operated to remove natural organic matter (NOM) originating from Dongbok Lake in Korea. Coagulation/sedimentation and sand filtration treated waters as membrane feed waters were used. Tested NF membranes such as RF ...

    Noeon Park, Sungyun Lee, Young Hoon Kim, Jaeweon Cho

  • Role of membranes and activated carbon in the removal of endocrine disruptors

    Role of membranes and activated carbon in the removal of endocrine disruptors

    As part of an American Water Works Association Research Foundation (AwwaRF) research project to evaluate conventional and advanced treatment processes for the removal of endocrine disruptors and pharmaceuticals (Project #2758), several experiments ...

    Shane Snyder, Eric Wert, Yeomin Yoon, and Paul Westerhoff

  • Can NF and ultra-LPRO membranes replace RO for the removal of organic...

    Can NF and ultra-LPRO membranes replace RO for the removal of organic...

    The scope of this project was to determine if low pressure membranes such as nanofiltration (NF) and ultra-low pressure reverse osmosis (ULPRO) membranes can meet water quality requirements necessary for indirect potable reuse while meeting ...

    Jörg E. Drewes, Christopher Bellona, John Luna, Christiane Hoppe, Gary Amy, Gerry Filteau, Gregg Oelker, NoHwa Lee, Jennifer Bender, Richard Nagel

  • Integrity and perfomance evaluation of new generation desalting membranes

    Integrity and perfomance evaluation of new generation desalting membranes

    Various RO membrane integrity monitoring methods are currently being evaluated during pilot testing at the North City Water Reclamation Plant (NCWRP) located in San Diego, CA. The main purpose of the testing is to assess both direct and indirect ...

    James DeCarolis, Samer Adham, Manish Kumar, Bill Pearce, Larry Wasserman

  • Evaluation of membrane bioreactor technology and desalting membranes for reuse..

    Evaluation of membrane bioreactor technology and desalting membranes for reuse..

    The City of Rio Rancho and MWH have recently completed a pilot-testing program to evaluate MBR technology followed by reverse osmosis (RO) membranes during operation on municipal wastewater. The pilot testing program is part of an overall water ...

    James DeCarolis, Samer Adham, Joan Oppenheimer, Karla Kinser, Larry Webb

  • Diffussive tortuosity factor of colloidal cake and biofilm

    Diffussive tortuosity factor of colloidal cake and biofilm

    Membrane fouling of fine colloids and biocolloids is ubiquitous in pressure-driven membrane processes, such as microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). In MF/UF, colloidal fouling is initiated by ...

    Albert S. Kim and Huaiqun Chen

  • Prediction of permeate flux decline in crossflow membrane filtration

    Prediction of permeate flux decline in crossflow membrane filtration

    Microfiltration (MF) and ultrafiltration (UF) are pressure-driven membrane processes which are widely used in order to remove colloidal particles and microorganisms in water and waste water treatment systems. The filtration performance is, however, ...

    Albert S. Kim and Huaiqun Chen

  • Comparison of RO and NF in wastewater reclamation

    Comparison of RO and NF in wastewater reclamation

    Currently, water reuse and reclamation are considered as an essential technology available for alternative water resources with respect to non-potable as well as potable uses. Therefore, lots of studies have been developing various technologies for ...

    Jihee Moon, Gun-Young Park, Young-Hoon Kim, Seong-Rho Yoon, In S. Kim, and Jaeweon Cho

  • Application of membrane technology in wastewater

    Application of membrane technology in wastewater

    The City of Rio Rancho is the fastest growing and fourth largest city in New Mexico. The City currently relies heavily on groundwater for water supplies. To sustain its long-term water needs, the City has undertaken a feasibility study to ...

    Karla Kinser, Larry Webb, Bill Landin

  • Integration of MBR and desalting membranes

    Integration of MBR and desalting membranes

    This presentation introduces the evaluation of MBR systems the assessment of the impact of adding coagulant and polymer to the MBR feed water on MBR performance the evaluation of MBR performance under extremem operating conditions (i.e. ...

    James DeCarolis, Samer Adham, Joan Oppenheimer, William H. Pearce, Larry Wasserman

  • Low-pressure desalting membranes for seawater

    Low-pressure desalting membranes for seawater

    The Long Beach Water Department (LBWD), similar to many Southern California utilities, have been facing the issue of decreased potable water supplies.  Because of its location, the City of Long Beach is ideally situated to take advantage of ...

    Tai Tseng, Robert C. Cheng, Diem X. Vuong, and Kevin L. Wattier

  • Bench-scale testing of SW desalination using NF

    Bench-scale testing of SW desalination using NF

    A majority of Southern California municipalities, including the City of Long Beach, depend on water purchased from the Metropolitan Water District of Southern California. However, due to over-allocation of the Colorado River, this water supply could ...

    Catherine J. Harrison, Amy E. Childress, Yann A. Le Gouellec, and Robert C. Cheng

  • Removal of hormones by NF

    Removal of hormones by NF

    Selected nanofiltration (NF) and ultrafiltration (UF) membranes were tested for the removal of the natural hormone, 17 -estradiol (E2) using a lab-scale cross-flow filtration apparatus housing flat sheet membrane coupons. The primary focus of this ...

    Eddie McCallum, Hoon Hyung, Amisha Shah, Ching-Hua Huang, Jae-Hong Kim

  • Pilot-scale study investigating RO/NF performance

    Pilot-scale study investigating RO/NF performance

    High-pressure membrane technologies, especially reverses osmosis, have been widely used in indirect potable water reuse projects due to their high removal efficiency for unregulated and unidentified organics, as well as nutrients and bulk organic ...

    Christopher Bellona, Jörg E. Drewes, Pei Xu, John Luna, and Christiane Hoppe