Use of fouling resistant nanofiltration and reverse osmosis membranes for dyeing wastewater effluent treatment.
Dyeing wastewater was post-treated by using nanofiltration (NF) and reverse osmosis (RO) membranes. To reduce membrane fouling, poly (vinyl alcohol) (PVA) with a neutral charge was coated on NF and RO membranes. The effect of surface charge and surface roughness on membrane fouling was investigated. Dyeing wastewater was pre-treated by using coagulation, activated sludge process, and MF process to investigate the effect of the pre-treatment on the membrane fouling. It is demonstrated that the extent of fouling is significantly influenced by the surface roughness and the surface charge on the NF and RO membranes. A membrane with a smooth and neutral surface was fouled less. The pre-treatment was essential for avoiding NF and RO membranes fouling. The quality of the final permeate was acceptable for water reuse.
Myung
S W
SW
Membrane and Separation Research Center, Korea Research Institute of Chemical Technology, P.O. Box 9, Daedeog-Danji, Taejon 305-606, Korea.
Choi
I H
IH
Lee
S H
SH
Kim
I C
IC
Lee
K H
KH
D019149:Bioreactors; D004396:Coloring Agents; D004868:Equipment Failure; D005374:Filtration / Q000379:methods; D007220:Industrial Waste; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D009995:Osmosis; D010539:Permeability; D011142:Polyvinyl Alcohol / Q000737:chemistry; D013783:Textile Industry; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D007220:Industrial Waste; D008567:Membranes, Artificial; D011142:Polyvinyl Alcohol