Comparison of ozonation and coagulation decolorization methods in real textile wastewater

Aydın, Muhammed Iberia; Yüzer, Burak; Öngen, Atakan; Ökten, Hatice Eser; Selçuk, Hüseyin

doi:10.5004/dwt.2018.21880

Cited by 14 publications

(9 citation statements)

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“…Operational cost of O. stricta (0.25 USD m −3 ) is lower than what has been reported in the literature for ozonation, polymer treatment and polymer coagulation followed by pre‐ozonation, i.e., 0.45, 0.61, and 0.32 USD m −3 , respectively. [ 17 ] Thus, O. stricta can also be used as effective pre‐treatment or polishing step for membrane processes, in context of reusability of treated wastewater.…”

Section: Resultsmentioning

confidence: 99%

“…Advanced oxidation processes (AOPs) have been employed for treatment of textile effluents. Some of the efficient AOPs for removal of dyes and other toxic pollutants from textile effluent include ozonation, [ 14–17 ] Fenton's reagents, [ 18,19 ] H 2 O 2 ‐UV, [ 20,21 ] photoelectro catalysis, [ 22 ] and nanoparticles. [ 23,24 ] Membrane processes (nanofiltration, ultrafiltration, microfiltration, and reverse osmosis) have also been applied for textile wastewater treatment as direct remediation [ 25 ] or as a polishing step, with intent to reuse treated effluents, preceded by coagulation, ozonation, and carbon adsorption processes as pretreatments.…”

Section: Introductionmentioning

confidence: 99%

“…Ozone, for instance, when employed as pre‐treatment has been found to reduce the optimum polymeric coagulant dosages and associated costs up to 25–28%. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

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Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Hussain

Haydar

2021

CLEAN Soil Air Water

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Natural plant‐based coagulants have gained popularity as sustainable and cost‐effective alternatives to chemical coagulants. In this study, a novel plant‐based coagulant, Opuntia stricta (O. stricta), is evaluated in comparison to alum for the treatment of textile wastewater. Response surface methodology is employed to optimize the treatment variables pH and coagulant dose. Efficacy of coagulants are compared based on removal of total suspended solids (TSS), chemical oxygen demand (COD), and color. Coagulants are characterized using Fourier transform infrared (FTIR) spectroscopy and flocs produced are analyzed using scanning electron microscopy (SEM). Alum shows a maximum removal of 87%, 75.9%, and 79.6% for TSS, COD, and color, respectively (optimum pH 9; dose: 103 mg L−1). O. stricta gives a maximum removal of 80.2%, 58.4%, and 77.3% for TSS, COD, and color, respectively (optimum pH 10.3; dose: 162.2 mg L−1). The optimum pH of O. stricta aligns well with actual pH of textile effluent (i.e. 10.6). Among the target pollutants, removal of COD is more dependent on pH as compared to the dose of coagulants. Coagulation agent in cladodes of O. stricta is postulated to be polysaccharides, which acts through adsorption and interparticle bridging mechanism of coagulation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Hussain

Haydar

2021

CLEAN Soil Air Water

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“…Sander Model 300.5 ozone generator was utilized to generate ozone gas from the pure oxygen gas with a supplied flow rate of 500 NL/h. The ozone generator worked at 250 mA electrical current and generated 4.5 g O 3 /h with a concentration of 14 g O 3 /m 3 [34]. Ozone treatment was applied to BTTWW samples until the color of wastewater has been removed.…”

Section: Ozonation Processmentioning

confidence: 99%

Recovery of Biologically Treated Textile Wastewater by Ozonation and Subsequent Bipolar Membrane Electrodialysis Process

Yüzer

Selçuk

2021

Membranes

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The Bipolar Membrane Electrodialysis process (BPMED) can produce valuable chemicals such as acid (HCl, H2SO4, etc.) and base (NaOH) from saline and brackish waters under the influence of an electrical field. In this study, BPMED was used to recover wastewater and salt in biologically treated textile wastewater (BTTWW). BPMED process, with and without pre-treatment (softening and ozonation), was evaluated under different operational conditions. Water quality parameters (color, remaining total organic carbon, hardness, etc.) in the acid, base and filtrated effluents of the BPMED process were evaluated for acid, base, and wastewater reuse purposes. Ozone oxidation decreased 90% of color and 37% of chemical oxygen demand (COD) in BTTWW. As a result, dye fouling on the anion exchange membrane of the BPMED process was reduced. Subsequently, over 90% desalination efficiency was achieved in a shorter period. Generated acid, base, and effluent wastewater of the BPMED process were found to be reusable in wet textile processes. Results indicated that pre-ozonation and subsequent BPMED membrane systems might be a promising solution in converging to a zero discharge approach in the textile industry.

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“…The advanced oxidation process (AOP) is widely adopted as the tertiary treatment for the removal of low-level refractory organic pollutants from the secondary effluent of industrial textile wastewater [12][13][14][15][16][17][18][19]. Recently, Fe 2+ /peracetic acid (PAA) has emerged as a potential alternative to the conventional Fe 2+ /hydrogen peroxide (H 2 O 2 ) Fenton AOP [20,21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fe2+/Peracetic Acid to Degrade Three Typical Refractory Pollutants of Textile Wastewater

et al. 2022

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In this work, the degradation performance of Fe2+/PAA/H2O2 on three typical pollutants (reactive black 5, ANL, and PVA) in textile wastewater was investigated in comparison with Fe2+/H2O2. Therein, Fe2+/PAA/H2O2 had a high removal on RB5 (99%) mainly owing to the contribution of peroxyl radicals and/or Fe(IV). Fe2+/H2O2 showed a relatively high removal on PVA (28%) mainly resulting from ·OH. Fe2+/PAA/H2O2 and Fe2+/H2O2 showed comparative removals on ANL. Additionally, Fe2+/PAA/H2O2 was more sensitive to pH than Fe2+/H2O2. The coexisting anions (20–2000 mg/L) showed inhibition on their removals and followed an order of HCO3− > SO42− > Cl−. Humic acid (5 and 10 mg C/L) posed notable inhibition on their removals following an order of reactive black 5 (RB5) > ANL > PVA. In practical wastewater effluent, PVA removal was dramatically inhibited by 88%. Bioluminescent bacteria test results suggested that the toxicity of Fe2+/PAA/H2O2 treated systems was lower than that of Fe2+/H2O2. RB5 degradation had three possible pathways with the proposed mechanisms of hydroxylation, dehydrogenation, and demethylation. The results may favor the performance evaluation of Fe2+/PAA/H2O2 in the advanced treatment of textile wastewater.

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Comparison of ozonation and coagulation decolorization methods in real textile wastewater

Cited by 14 publications

References 0 publications

Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Recovery of Biologically Treated Textile Wastewater by Ozonation and Subsequent Bipolar Membrane Electrodialysis Process

Evaluation of Fe2+/Peracetic Acid to Degrade Three Typical Refractory Pollutants of Textile Wastewater

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