Performance evaluation of down-flow hanging sponge reactor for direct treatment of actual textile wastewater; Effect of effluent recirculation to performance and microbial community

Watari, Takahiro; Hata, Yuya; Hirakata, Yuga; Nguyet, Phan Nhu; Nguyen, Thu Huong; Maki, Shinya; Hatamoto, Masashi; Sutani, Daisuke; Setia, Tjandra; Yamaguch, Takashi

doi:10.1016/j.jwpe.2020.101724

Cited by 23 publications

(10 citation statements)

References 45 publications

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“…More than 7 Â 10 5 tons of dyes are synthesized annually worldwide. The structures of the dyes used in the textile industry are changed continuously to meet the color shade requirements and realize colorfastness (Watari et al 2021). The annual global market growth rate has been reported to be 8.13%.…”

Section: Technologies Currently In Use To Treat Textile Wastewatermentioning

confidence: 99%

Reviewing textile wastewater produced by industries: characteristics, environmental impacts, and treatment strategies

Wang

Jiang

Gao

2022

Water Science and Technology

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The textile industry is one of the most intensive industries in chemical products whose wastewater contains hazardous dyes, pigments, dissolved/suspended solids, and heavy metals. Hence, it is important to effectively treat the wastewater generated by this industry before releasing it into the environment. Though the field of textile wastewater treatment has made tremendous progress, the developed treatment methods should be improved further to make them economically viable and friendly. In this review, characteristics of textile wastewater are introduced. We have primarily focused on the environmental impact and toxicity of textile wastewater. Toxic and harmful contaminants must be removed from textile wastewater to reduce the extent of environmental pollution caused when textile wastewater is released into rivers or reused. Hence, various techniques that are used to treat textile wastewater are discussed. Finally, the challenges faced, and prospects of the methods have been discussed in detail.

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Section: Technologies Currently In Use To Treat Textile Wastewatermentioning

confidence: 99%

Reviewing textile wastewater produced by industries: characteristics, environmental impacts, and treatment strategies

Wang

Jiang

Gao

2022

Water Science and Technology

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“…The textile sector contributes to 2% of the global GDP and has a market value of $3 trillion (Shirvanimoghaddam et al, 2020). The textile industry is responsible for the global consumption of 98 million tonnes of non‐renewable resources (Freudenreich & Schaltegger, 2020) and contributes approximately 20% of the world's water pollution (Watari et al, 2021). The annual consumption of fibre per head worldwide has grown over the last 20 years, from 7 to 13 kg (Coles, 2016).…”

Section: Introductionmentioning

confidence: 99%

Sustainability transformation in the textile industry—The case of wastewater management

Gomes,

Caucci,

Morris

et al. 2023

Bus Strat Dev

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This paper explores the relationships between textile wastewater management and its impact on ecosystems and community livelihoods. Using the case of the wastewater management practices of the Bangladesh textile industry and thematic analysis of key informant interviews with industry representatives in the production value chain, the study illustrates perceptions of sustainability transformation regarding wastewater management, specifically by integrating sustainable water and energy practices. The findings reveal the adverse effects of textile wastewater on freshwater resources, such as the obstruction of socio‐economic development and environmental sustainability, and highlight the distinctions between compliant and non‐compliant textile industries regarding sustainability transformation. These results also indicate challenges that hinder the sustainability of textile effluent treatment, including the absence of techno‐ecology, pro‐environmental behaviour, stringent regulations, reliable surveillance, and collaborative actions. Recommendations include improving cooperation among community‐stakeholders and decision‐makers to promote sustainability transformation in textile wastewater management, prioritising water energy resources to advance environmental development, and fulfilling socio‐economic demands.

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“…Although anaerobic biological pathways are also used for energy production, they encounter multiple obstacles during real applications. These challenges include a slow bacterial growth rate, instability under fluctuating environmental conditions, and inefficiency at varying hydraulic and organic loading rates [12]. In addition, anaerobic systems require a posttreatment process, especially if the effluent contains high concentrations of ammonium ion (NH 4 + ) and hydrogen sulfide (HS − ) [4].…”

Section: Introductionmentioning

confidence: 99%

Environmental and Economic Evaluation of Downflow Hanging Sponge Reactors for Treating High-Strength Organic Wastewater

et al. 2023

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This study evaluated the performance of a downflow hanging sponge (DHS) in reducing the concentrations of chemical oxygen demand (COD), ammonia (NH3), total suspended solids (TSS), and total dissolved solids (TDS) in high-strength organic wastewater (HSOW). The DHS unit was composed of three segments connected vertically and operated under different organic loading rates (OLRs) between 3.01 and 12.33 kg COD/m3sponge/d at a constant hydraulic retention time (HRT) of 3.6 h. The results demonstrated that the DHS system achieved COD, NH3, TSS, and TDS removal efficiencies of 88.34 ± 6.53%, 64.38 ± 4.37%, 88.13 ± 5.42%, and 20.83 ± 1.78% at an OLR of 3.01 kg COD/m3sponge/d, respectively. These removal efficiencies significantly (p < 0.05) dropped to 76.39 ± 6.58%, 36.59 ± 2.91%, 80.87 ± 5.71%, and 14.20 ± 1.07%, respectively, by increasing the OLR to 12.33 kg COD/m3sponge/d. The variation in COD experimental data was well described by the first-order (R2 = 0.927) and modified Stover–Kincannon models (R2 = 0.999), providing an organics removal constant (K1) = 27.39 1/d, a saturation value constant (KB) = 83.81 g/L/d, and a maximum utilization rate constant (Umax) = 76.92 g/L/d. Adding another DHS reactor in a secondary phase improved the final effluent quality, complying with most environmental regulation criteria except those related to TDS concentrations. Treating HSOW with two sequential DHS reactors was economically feasible, with total energy consumption of 0.14 kWh/m3 and an operating cost of about 7.07 USD/m3. Accordingly, using dual DHS/DHS units to remove organics and nitrogen pollutants from HSOW would be a promising and cost-efficient strategy. However, a tertiary treatment phase could be required to reduce the TDS concentrations.

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Performance evaluation of down-flow hanging sponge reactor for direct treatment of actual textile wastewater; Effect of effluent recirculation to performance and microbial community

Cited by 23 publications

References 45 publications

Reviewing textile wastewater produced by industries: characteristics, environmental impacts, and treatment strategies

Reviewing textile wastewater produced by industries: characteristics, environmental impacts, and treatment strategies

Sustainability transformation in the textile industry—The case of wastewater management

Environmental and Economic Evaluation of Downflow Hanging Sponge Reactors for Treating High-Strength Organic Wastewater

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