Polishing of biologically treated textile wastewater through AOPs and recycling for wet processing

Nadeem, K.; Guyer, Gokce Tezcanli; Dizge, Nadir

doi:10.1016/j.jwpe.2017.09.011

Cited by 22 publications

(9 citation statements)

References 24 publications

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“…As shown in Equation , the radical scavenging effect occurred at greater Fe 2+ concentrations as a result of the interaction between excess Fe 2+ and the HO ● radical in the medium, decreasing RE of COD (Walling, 1975). Similar results have been achieved in other studies (Ebrahiem et al, 2017; GilPavas et al, 2017; Nadeem et al, 2017; Olabi & Yildiz, 2021a).

{Fe}^{2 +} goodbreak+ {HO}^{●} \to {Fe}^{3 +} goodbreak+ {OH}^{-}

In MF process, RE also were continuously rising up to 1 g/L of Fe 0 concentration.…”

Section: Resultssupporting

confidence: 91%

Ultrasound‐assisted photo‐Fenton process for treatment of pulp and paper mill wastewater and reduction of phytotoxicity

Olabi

2023

Water & Environment J

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The efficiency of classical Fenton (CF) and modified Fenton (MF) as well as photo‐Fenton processes in real wastewater treatment of pulp and paper (P&P) mill was investigated in this study. The chemical oxygen demand (COD) was chosen as the reference measurement for evaluating the treatment's efficiency. After determining the optimum parameters for each process, the effect of adding ultrasound (US) on improving treatment efficiency was examined. In addition, kinetic study and phytotoxicity analysis were conducted under optimum conditions for all processes. With pH 4, reaction time 50 min, 1.2 g/L Fe2+ and 8 g/L H2O2 dosages, the best removal efficiency (RE) of COD was determined to be 82.18% in CF process, and this rate rose to 90.1% when US was added. The best RE in MF process was 84.16% with the application of UV‐C, pH 4, reaction time 50 min, 1 g/L Fe0 and 8 g/L H2O2 doses, although it increased to 93.4% when US was applied. The greatest results in the seed germination test were achieved in US processes with 100% of germination percentage (GP) for spinach and tomato and 90% for cress. In the economic evaluation, when conducting the treatment without US, the estimated relative cost decreased in a 15 and 16%, for CF/UV‐C and CF processes respectively, whereas the CF process was 64% cheaper than the MF process in all applications. The US contributed to enhanced water treatment efficiency by having a significant synergistic impact on Fenton applications. Hence, the combination of photo‐Fenton and ultrasound to treat effluent from P&P mills proved to be an effective and promising technique.

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{Fe}^{2 +} goodbreak+ {HO}^{●} \to {Fe}^{3 +} goodbreak+ {OH}^{-}

In MF process, RE also were continuously rising up to 1 g/L of Fe 0 concentration.…”

Section: Resultssupporting

confidence: 91%

Ultrasound‐assisted photo‐Fenton process for treatment of pulp and paper mill wastewater and reduction of phytotoxicity

Olabi

2023

Water & Environment J

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“…Ozonation is considered effective to reduce the color of the raw water that its color is caused by dissolved organic matter, e.g., humic and fulvic acids (biological decomposition products from vegetation) as well as high-colored wastewater of the textile industry [11][12][13][14]. Ozonation can simultaneously interact and break down low-biodegradability organic compounds in wastewater, increase biodegradability, and improve the subsequent biological treatment process [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The latter is less selective and predominates under alkaline conditions, while direct oxidation is more selective and predominates under acidic conditions [16,21]. Success in the use of ozone has been reported, not only to treat dye wastewaters to meet effluent standards but also to focus on decolorization of textile industry wastewaters for reuse [11,12,[22][23][24][25]. The application of ozone to treat the color of boric acid-borax solutions that are used as wood preservatives has never been reported.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of Boron-Based Wood Preservatives by Ozonation for Recycling: Optimization of Process Parameters

Yanchimpee

Thawornchaisit²

2022

Trends Sci

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Preservation of sawn timber from rubber trees with a water-soluble mixture of boric acid and borax generates a large quantity of colored wood preservative solutions and carries toxic metals, especially boron. To save costs, millers commonly reuse the colored mixtures in successive preservation cycles but regularly add boric acid and borax to maintain boron levels. However, this strategy affects both the color and the economic value of the treated wood. This paper presents a new strategy to treat the colored mixture of waterborne preservative solutions using ozonation for recycling purposes. At optimum conditions which are determined by response surface methodology, very high color removal (96 - 97 %) is achieved from ozone treatment of the wood preservatives with an initial COD concentration of 2,250 ± 40 mg/L and solution pH of 3.59 ± 0.02 for 65 min reaction time. The effluent can be reused in successive preservation cycles without degrading the wood quality in terms of the color of the processed timber and boron penetration in the end grain as well as the sides of the wood. Ozone treatment shows to be a promising color removal technology for sawn rubberwood industry, aimed at the reuse of waterborne preservatives, resulting in direct environmental and economic benefits. HIGHLIGHTS Application of ozone (O3) can be a clean technology to treat the color of aqueous solutions for in-process recycling in sawn rubberwood industry Box-Behnken design and Response Surface Methodology applied to find the optimum conditions for color removal from the mixture of boric acid and borax Recycling the mixture of boric acid and borax in a subsequent wood preservation operation gave very promising results The reusability of boron-based wood preservative solutions after ozonation minimizes the occurrence of industrial chemical waste GRAPHICAL ABSTRACT

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“…The potential of ozonation makes it widely used in water reuse systems [16]. On the contrary, one of its disadvantages is the high investment costs and energy consumption [18]. Furthermore, effluent salinity must be removed for textile wastewater reuse.…”

Section: Introductionmentioning

confidence: 99%

Textile Wastewater Treatment for Water Reuse: A Case Study

Yin

Qiu²,

Qian³

et al. 2019

Processes

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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.

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Polishing of biologically treated textile wastewater through AOPs and recycling for wet processing

Cited by 22 publications

References 24 publications

Ultrasound‐assisted photo‐Fenton process for treatment of pulp and paper mill wastewater and reduction of phytotoxicity

Ultrasound‐assisted photo‐Fenton process for treatment of pulp and paper mill wastewater and reduction of phytotoxicity

Decolorization of Boron-Based Wood Preservatives by Ozonation for Recycling: Optimization of Process Parameters

Textile Wastewater Treatment for Water Reuse: A Case Study

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