Treatment of textile effluents by H2O2/UV oxidation combined with RO separation for reuse.
This study evaluates the feasibility of the treatment of textile effluents by H2O2/UV oxidation combined with reverse osmosis (RO) membrane separation for water reuse in textile dying processes. The results showed that the conductivity of textile effluents was from 2340 to 4560 micros/cm. Addition of auxiliary chemicals used during the dyeing processes increased the conductivity in textile wastewaters. The H2O2/UV pre-oxidation of textile effluents can mineralize or oxidize dissolved organic carbon (DOC) effectively. However, the removal of conductivity and hardness were poor. Pretreatment of the textile effluent by H2O2/UV oxidation can decrease silt density index (SDI) values and osmotic pressure and increase permeate flux when followed by RO separation. H2O2/UV pre-oxidation and RO post-treatment can improve the textile effluent quality and meet the water quality criteria for water reuse in the textile industry. In conclusion, the combined H2O2/UV pre-oxidation and RO post-process is a promising treatment for textile effluents for water reuse.
Kang
Shyh-Fang
SF
Department of Water Resources and Environmental Engineering, Tamkang University, Taipei, Taiwan, Republic of China. kangsf@mail.tku.edu.tw
Yen
Hsing-Yuan
HY
Yang
Mu-Hoe
MH
D003247:Conservation of Natural Resources; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007220:Industrial Waste; D009995:Osmosis; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D013783:Textile Industry; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D016877:Oxidants; D006861:Hydrogen Peroxide