scholarly journals INVESTIGATION of COLOR REMOVAL in REAL TEXTILE INDUSTRY WASTEWATER with MEMBRANE BIOREACTOR-ACTIVE CARBON SYSTEM

2021 ◽  
pp. 18-21
Author(s):  
Nurtaç Öz ◽  
Meryem Yılmaz ◽  
Ahmet Çelebi
Keyword(s):  
Activated Carbon ◽  
Active Carbon ◽  
Textile Industry ◽  
Membrane Bioreactor ◽  
High Efficiency ◽  
Textile Wastewater ◽  
Color Removal ◽  
Color Measurement ◽  
Pollution Level ◽  
Carbon System

The textile industry is an industry that consumes large amounts of water during production, contains various chemicals in its wastewater, conventional treatment methods are insufficient to reduce the wastewater pollution level, and has colloidal substances and color problems. Membrane bioreactor systems provide high efficiency in the treatment of textile wastewater and dyestuff removal. Removal of dyestuffs and turbidity in real textile wastewater by using a laboratory-scale membrane bioreactor system was studied. Chemical precipitation was not applied before the biological treatment for the removal of color and other pollutant parameters. A hollow fiber microfiltration membrane module was used in the system. Then a combination with an active carbon filter was created to take the color removal to a higher level. The development of the microorganism composition adapted to the textile industry was observed in the biological reactor. The system was operated with an endless sludge age and a hydraulic retention time of 24 hours. Color measurement transparency index parameter DFZ (DurchsichtsFarbZahl) was measured in a spectrophotometer at wavelengths of 436, 525, and 620 nm (nanometers) according to EN ISO 7887 standards. In the microfiltration permeate water, the color removal were found in 436 nm: 91-95%, 525 nm: 94-98%, 620 nm: 96-99%, and in activated carbon permeate water, the color removal in 436 nm: 96-99% at 525 nm: 95-99%, 620 nm: 96-99%, respectively. Due to the physical separation of the membrane, which is the simplest definition, high efficiencies in color removal have been achieved in the system. The activated carbon system combined with the membrane was found higher efficiency in color removal than the microfiltration output.

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.

Use of submerged anaerobic membrane bioreactor (SAMBR) containing powdered activated carbon (PAC) for the treatment of textile effluents

2012 ◽  
Vol 65 (9) ◽  
pp. 1540-1547 ◽  
Author(s):  
B. E. L. Baêta ◽  
R. L. Ramos ◽  
D. R. S. Lima ◽  
S. F. Aquino
Keyword(s):  
Activated Carbon ◽  
Membrane Bioreactor ◽  
Volatile Fatty Acids ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Membrane Bioreactors ◽  
Powdered Activated Carbon ◽  
Excellent Performance ◽  
Reactor Stability ◽  
Anaerobic Membrane Bioreactors

This work investigated the use of submerged anaerobic membrane bioreactors (SAMBRs) in the presence and absence of powdered activated carbon (PAC) for the treatment of genuine textile wastewater. The reactors were operated at 35 °C with an HRT of 24 h and the textile effluent was diluted (1:10) with nutrient solution containing yeast extract as the source of the redox mediation riboflavin. The results showed that although both SAMBRs exhibited an excellent performance, the presence of PAC inside SAMBR-1 enhanced reactor stability and removal efficiency of chemical oxygen demand (COD), volatile fatty acids (VFA), turbidity and color. The median removal efficiencies of COD and color in SAMBR-1 were, 90 and 94% respectively; whereas for SAMBR-2 (without PAC) these values were 79 and 86%, In addition, the median values of turbidity and VFA were 8 NTU and 8 mg/L for SAMBR-1 and 14 NTU and 26 mg/L for SAMBR-2, indicating that the presence of PAC inside SAMBR-1 led to the production of an anaerobic effluent of high quality regarding such parameters.

scholarly journals Kinetics of COD and Dye Removal for Waste Water from Textile Industry

2021 ◽  
Vol 9 (9) ◽  
pp. 237-244
Author(s):  
Heena Rani Bindala
Keyword(s):  
Waste Water ◽  
Water Pollution ◽  
Activated Carbon ◽  
Textile Industry ◽  
Dye Removal ◽  
Textile Wastewater ◽  
Electrochemical Treatment ◽  
Efficient Treatment ◽  
Treatment Technologies ◽  
Kinetics Of

Abstract: Water pollution poses serious threats to both the environment and the organisms that depend on their environment for survival. Due to the toxicity from dyes in textile wastewater, there is a dire need for the development of innovative and efficient treatment technologies. In this study treatability studies, using a electrochemical treatment (ECT) method followed by activated carbon (AC) based adsorption. ECT method was studied extensively for the treatment of reactive black dye. Moreover, to understand the practical applicability of ECTs, the findings were optimized for treatment of synthetic textile wastewater (STW).

scholarly journals Textile Wastewater Treatment for Water Reuse: A Case Study

Processes ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 34 ◽  
Author(s):  
Hua Yin ◽  
Peiwen Qiu ◽  
Yuange Qian ◽  
Zhuwen Kong ◽  
Xiaolong Zheng ◽  
...  
Keyword(s):  
Textile Industry ◽  
Water Reuse ◽  
Natural Waters ◽  
Removal Rate ◽  
Operating Cost ◽  
Textile Wastewater ◽  
Color Removal ◽  
Combined Processes ◽  
Sand Filtration ◽  
Drinking Water Standard

The reduced natural waters and the large amount of wastewater produced by textile industry necessitate an effective water reuse treatment. In this study, a combined two-stage water reuse treatment was established to enhance the quality and recovery rate of reused water. The primary treatment incorporated a flocculation and sedimentation system, two sand filtration units, an ozonation unit, an ultrafiltration (UF) system, and a reverse osmosis (RO) system. The second treatment included an ozonation unit, a sand filtration unit, and UF and RO systems. The color removal rate increased with the increasing ozone dosage, and the relational expression between the ozone dosage and color removal rate was fitted. Ozonation greatly reduced the color by 92.59 and 97.27 times during the primary and second ozonation stages, respectively. RO had the highest removal rate. The combined processes showed good performance in water reuse treatment. The treated, reused water satisfied the reuse standard and surpassed the drinking water standard rates for chemical oxygen consumption (CODcr), color, NH3-N, hardness, Cl−, SO42−, turbidity, Fe3+, and Cu2+. The operating cost of reuse water treatment was approximately 0.44 USD·m−3.

Effect of ozone, chlorine and hydrogen peroxide on the elimination of colour in treated textile wastewater by MBR

2004 ◽  
Vol 49 (4) ◽  
pp. 299-303 ◽  
Author(s):  
M. Brik ◽  
B. Chamam ◽  
P. Schöberl ◽  
R. Braun ◽  
W. Fuchs
Keyword(s):  
Hydrogen Peroxide ◽  
Membrane Bioreactor ◽  
High Efficiency ◽  
Advanced Oxidation ◽  
Textile Wastewater ◽  
Promising Method ◽  
Active Chlorine ◽  
Peroxide Oxidation ◽  
Colour Removal

In treating textile wastewater, the application of membrane bioreactor (MBR) technology showed high efficiency in COD and BOD5 removal. However, insufficient colour removal was achieved for possible reuse. The aim of the work presented in this paper was to test the performance of chemical advanced oxidation on the elimination of the colour downstream of an MBR. To improve the quality of the membrane bioreactor effluent three different oxidation treatments were tested at lab-scale: ozonation, chlorination and hydrogen peroxide oxidation. Colour, COD and BOD5 were controlled in order to assess the effectiveness of each process. For chlorination, even with 250 mg/L (active chlorine) only 80% colour removal (SACin = 14; SACout = 2.8) was achieved which is considered unsatisfactory. For hydrogen peroxide, the colour removal was even poorer; it was just 10% at a concentration of 250 mg/L. In contrast, good results were obtained by ozonation. By using only 38 mg/L within 20 minutes, it was possible to achieve the reuse recommendation with a satisfactory colour removal of 93% (SACin = 14; SACout = 0.98). The results showed that ozonation was the most promising method.

scholarly journals Comparative Studies of Using Nano Zerovalent Iron, Activated Carbon, and Green Synthesized Nano Zerovalent Iron for Textile Wastewater Color Removal Using Artificial Intelligence, Regression Analysis, Adsorption Isotherm, and Kinetic Studies

2020 ◽  
Vol 13 ◽  
pp. 117862212090827 ◽  
Author(s):  
Ahmed Karam ◽  
Khaled Zaher ◽  
Ahmed S Mahmoud
Keyword(s):  
Regression Analysis ◽  
Activated Carbon ◽  
Contact Time ◽  
Textile Wastewater ◽  
Color Removal ◽  
Zerovalent Iron ◽  
X Ray ◽  
Stirring Rate ◽  
Nano Zerovalent Iron ◽  
Initial Color

Daily, a big extent of colored, partially treated textile effluents drained into the sanitation systems causing serious environmental concerns. Therefore, the decolorization treatment process of wastewater is crucial to improve effluent quality. In the present study, 3 different sorbent materials, nano zerovalent iron (nZVI), activated carbon (AC), and green-synthesized nano zerovalent iron (GT-nZVI), have been prepared for raw textile wastewater decolourization. The prepared nanomaterials were characterized via X-ray diffraction (XRD) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, and UV-Vis absorption spectroscopy. In addition, the effect of different operating parameters such as pH, contact time, and stirring rate on the color removal efficiency was extensively studied to identify the optimum removal conditions. The reaction temperature, adsorbent dose, and initial color concentration were fixed during the experiments at room temperature, 0.7 g/L, and 350 and 50 mg/L Pt/Co color unit, respectively. Moreover, adsorption and reaction kinetics were analyzed using different isotherms and models. For simulating the adsorption process, artificial neural network (ANN) data were compatible with the result of regression analysis derived from response surface methodology (RSM) optimization. Our results showed the higher ability of nZVI, AC, and GT-nZVI in textile wastewater color removal. At pH 5, contact time 50 minutes, and stirring rate 150 rpm, nZVI showed good color removal efficiency of about 71% and 99% for initial color concentrations of 350 and 50 mg/L Pt/Co color unit, respectively. While slightly higher color removal ability of about 72% and 100% was achieved by using AC at pH 8, contact time 70 minutes, and stirring rate 250 rpm. Finally, the largest ability of color removal about 85% and 100% was recorded for GT-nZVI at pH 7, contact time 40 minutes, and stirring rate 150 rpm. This work shows the enhanced color removal ability of GT-nZVI as a potential textile wastewater decolourization material, opening the way for many industrial and environmental applications.

scholarly journals Rapid decolorization of textile wastewater by green synthesized iron nanoparticles

2017 ◽  
Vol 77 (2) ◽  
pp. 511-517 ◽  
Author(s):  
Z. Y. Ozkan ◽  
M. Cakirgoz ◽  
E. S. Kaymak ◽  
E. Erdim
Keyword(s):  
Green Tea ◽  
Textile Industry ◽  
Iron Nanoparticles ◽  
Textile Wastewater ◽  
Punica Granatum ◽  
Color Removal ◽  
Wastewater Sample ◽  
Polyphenolic Content ◽  
Tea Extract ◽  
A Minor

Abstract The effectiveness of green tea (Camellia sinensis) and pomegranate (Punica granatum) extracts for the production of iron nanoparticles and their application for color removal from a textile industry wastewater was investigated. Polyphenols in extracts act as reducing agents for iron ions in aqueous solutions, forming iron nanoparticles. Pomegranate extract was found to have almost a 10-fold higher polyphenolic content than the same amount of green tea extract on a mass basis. However, the size of the synthesized nanoparticles did not show a correlation with the polyphenolic content. 100 ppm and 300 ppm of iron nanoparticles were evaluated in terms of color removal efficiency from a real textile wastewater sample. 300 ppm of pomegranate nanoscale zero-valent iron particles showed more than 95% color removal and almost 80% dissolved organic carbon removal. The degradation mechanisms are is considered to be adsorption and precipitation to a major extent, and mineralization to a minor extent.

scholarly journals Comparison of naturally prepared coagulants for removal of COD and color from textile wastewater

2013 ◽  
Vol 15 (4) ◽  
pp. 522-528 ◽  
Keyword(s):  
Textile Industry ◽  
Textile Wastewater ◽  
Color Removal ◽  
Volume Index ◽  
Percentage Reduction ◽  
Maize Seed ◽  
Sludge Volume Index ◽  
Maximum Percentage ◽  
Industrial Sectors ◽  
Flocculation Time

<p>The wastewater generated by the textile industry is rated as the most polluting among all industrial sectors considering both volumes discharged and effluent composition. Present investigation intended for COD and color removal from textile wastewater using naturally prepared coagulants i.e. Surjana Seed Powder (SSP), Maize Seed Powder (MSP) and Chitosan. Effect of coagulant dose, flocculation time and temperature has been studied. The Sludge Volume Index (SVI) and turbidity were examined for various effects. SSP was more effective than Chitosan and MSP for the removal of COD and color and also, Chitosan was more efficient than SSP and MSP considering SVI and turbidity. Maximum percentage reduction corresponds to 75.6 and 62.8 was obtained for removal of COD and color respectively using SSP.</p>

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