Color removal from simulated dye water and actual textile wastewater using a composite coagulant prepared by ployferric chloride and polydimethyldiallylammonium chloride

2007 ◽  
Vol 54 (2) ◽  
pp. 157-163 ◽  
Author(s):  
Bao-Yu Gao ◽  
Yan Wang ◽  
Qin-Yan Yue ◽  
Jin-Cheng Wei ◽  
Qian Li
Keyword(s):  
Textile Wastewater ◽  
Color Removal ◽  
Composite Coagulant

scholarly journals Performances of Anoxic- Aerobic Membrane Bioreactors for The Treatment of Real Textile Wastewater

2019 ◽  
Keyword(s):  
Bacterial Communities ◽  
Textile Industry ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Membrane Bioreactors ◽  
Color Removal ◽  
Toc Removal ◽  
Recycle Ratio ◽  
Operation Period ◽  
The Impact

<p>Wastewater from textile industry is considered one of the major environmental challenges due to the large volume of highly colored, polluted and toxic effluent. This study investigated the treatability of real textile wastewater by pilot-scale anoxic-aerobic Membrane Bioreactor (MBR) system without sludge wasting for operation period of 100 days. The proposed system was investigated under different Internal Recycle (IR) ratios and the impact of IR ratio on Total Organic Carbon (TOC), Total Nitrogen (TN) and Color removals were examined. Under IR ratios between anoxic and aerobic tanks of 0.0, 0.5 and 2.0, the respective average removal efficiency of TN was 20.9%,53.4% and 71.7%, whereas average color removal of 81%, 85% and 88%, respectively was noted. The results indicated that increase of recycle ratio from 0.5 to 2.0 enhanced TN removal to about 71% and color removal to above 85%. The IR between anoxic and aerobic tanks has a significant role in TN and color removal due its effect on the development of bacterial communities. On the other hand, the results indicate over 93% TOC removal, which was independent of IR ratio.</p>

Ozonation application in activated sludge systems for a textile mill effluent

2002 ◽  
Vol 45 (12) ◽  
pp. 305-313 ◽  
Author(s):  
D. Orhon ◽  
H. Dulkadiroğlu ◽  
S. Doğruel ◽  
I. Kabdaşli ◽  
S. Sozen ◽  
...  
Keyword(s):  
Textile Industry ◽  
Contact Time ◽  
Biological Treatment ◽  
Textile Wastewater ◽  
Color Removal ◽  
Flux Rate ◽  
Textile Mill ◽  
Treatment Results ◽  
Cod Reduction ◽  
Activated Sludge Systems

The study investigates the effect of partial ozonation of textile wastewater, both at the inlet (pre-ozonation) and the outlet (post-ozonation) of biological treatment, for the optimization of COD and color removals, both typical polluting parameters associated with the textile industry. Pre-ozonation provides at optimum contact time of 15 minutes 85% color removal, but only 19% COD reduction. Removal of the soluble inert COD fraction remains at 7%, indicating selective preference of ozone for simpler compounds. Post-ozonation is much more effective on the breakdown of refractory organic compounds and on color removal efficiency. Ozonation after biological treatment results in almost complete color removal and a 14% soluble inert COD reduction. The polishing effect of post-ozonation also proves quite attractive from an economical standpoint, involving approximately 50% of the ozone utilization at the same ozone flux rate and contact time, yet providing a lower soluble residual COD level.

scholarly journals Supported Zinc Oxide Photocatalyst for Decolorization and Mineralization of Orange G Dye Wastewater under UV365 Irradiation

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Ming-Chin Chang ◽  
Hung-Yee Shu ◽  
Tien-Hsin Tseng ◽  
Hsin-Wen Hsu
Keyword(s):  
Reaction Time ◽  
Azo Dye ◽  
Textile Wastewater ◽  
Color Removal ◽  
Fluorescent Light ◽  
Preparation Temperature ◽  
Steel Mesh ◽  
Toc Removal ◽  
Photocatalytic System ◽  
Orange G

To solve the environmental challenge of textile wastewater, a UV/ZnO photocatalytic system was proposed. The objective of this study was to prepare a photocatalytic system by utilizing both cold cathode fluorescent light (CCFL) UV irradiation and steel mesh supported ZnO nanoparticles in a closed reactor for the degradation of azo dye C.I. Orange G (OG). Various operating parameters such as reaction time, preparation temperature, mixing speed, ZnO dosage, UV intensity, pH, initial dye concentration, and service duration were studied. Results presented efficient color and total organic carbon (TOC) removal of the OG azo dye by the designed photocatalytic system. The optimal ZnO dosage for color removal was 60 g m−2. An alkaline pH of 11.0 was sufficient for photocatalytic decolorization and mineralization. The rate of color removal decreased with the increase in the initial dye concentration. However, the rate of color removal increased with the increase in the UV intensity. The steel mesh supported ZnO can be used repeatedly over 10 times without losing the color removal efficiency for 120 min reaction time. Results of Fourier transform infrared (FTIR) and ion chromatography (IC) indicated the breakage of N=N bonds and formation of sulfate, nitrate, and nitrite as the major and minor products. The observation indicated degradation of dye molecules.

Color removal of real textile wastewater by sequential anaerobic and aerobic reactors

2004 ◽  
Vol 9 (5) ◽  
pp. 419-422 ◽  
Author(s):  
You-Kwan Oh ◽  
Yu-Jin Kim ◽  
Yeonghee Ahn ◽  
Seung-Koo Song ◽  
Sunghoon Park
Keyword(s):  
Textile Wastewater ◽  
Color Removal

Preparation and optimization of inorganic-organic composite coagulant for enhancing treatment of textile wastewater

2019 ◽  
Vol 144 ◽  
pp. 322-329
Author(s):  
Hongjie Zhou ◽  
Lu Zhou ◽  
Xiaoyu Yang ◽  
Qian Wang
Keyword(s):  
Textile Wastewater ◽  
Composite Coagulant
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