On-site performance of floating treatment wetland macrocosms augmented with dye-degrading bacteria for the remediation of textile industry wastewater

Tara, Nain; Arslan, Muhammad; Hussain, Zahid; Iqbal, Mazhar; Khan, Qaisar Mahmood; Afzal, Muhammad

doi:10.1016/j.jclepro.2019.01.258

Cited by 121 publications

(68 citation statements)

References 44 publications

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“…Shehzadi et al [44] showed the abundance of the genus Bacillus in the endosphere of different wetland plant species, whereas several studies confirmed the Pseudomonas prevalence in the endosphere of P. australis [45,46,47]. The Bacillus and Pseudomonas genera were commonly found associated to the root apparatus of plants growing under adverse environmental condition [24,48], since they are able to use a wide range of substrates as energy and carbon sources and are often tolerant to toxic compounds [46,49]. The strain collection obtained from P. australis rhizosphere in this study was dominated by Firmicutes (57% of the isolates), with a lower percentage of Proteobacteria and Bacteroidetes, that found a more suitable habitat in the plant endosphere, and Actinobacteria , that conversely were not isolated from the endosphere fraction.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies showed that micropollutants, including emerging organic contaminants (EOCs) like pharmaceuticals and personal care products, plasticizers and heavy metals can be removed in CWs [21,22,23]. The biological removal of synthetic dyes was recently showed in floating treatment wetland mesocosms carrying Phragmites australis in combination with three dye-degrading bacteria [24]. Furthermore, a Bacillus strain, isolated from the rhizosphere of sorghum plants grown in textile wastewater contaminated soil, efficiently decolorized different azo dyes and was indicated as a powerful inoculant for the bioremediation of textile wastewaters [2].…”

Section: Introductionmentioning

confidence: 99%

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Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration

et al. 2019

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The microbiome associated with plants used in phytodepuration systems can boost plant growth and services, especially in ecosystems dealing with recalcitrant compounds, hardly removed via traditional wastewater (WW) treatments, such as azo-dyes used in textile industry. In this context, we aimed to study the cultivable microbiome selected by Phragmites australis plants in a Constructed Wetland (CW) in Morocco, in order to obtain candidate inoculants for the phytodepuration of azo-dye contaminated WW. A collection of 152 rhizospheric and endophytic bacteria was established. The strains were phylogenetically identified and characterized for traits of interest in the phytodepuration context. All strains showed Plant Growth Promotion potential in vitro and 67% of them significantly improved the growth of a model plant in vivo compared to the non bacterized control plants. Moreover, most of the isolates were able to grow in presence of several model micropollutants typically found in WW, indicating their potential use in phytodepuration of a wide spectrum of effluents. The six most promising strains of the collection were tested in CW microcosms alone or as consortium: the consortium and two single inocula demonstrated to significantly increase the removal of the model azo-dye Reactive Black 5 compared to the non bacterized controls.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration

et al. 2019

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“…It has been reported by many studies that various types of domestic and industrial wastewaters are widely treated using floating treatment wetlands [10][11][12][13][14]. This innovative technology has low installation, operational and maintenance costs, along with aesthetic value and environmentally friendly quality [15,16].…”

Section: Introductionmentioning

confidence: 99%

Cyperus laevigatus L. Enhances Diesel Oil Remediation in Synergism with Bacterial Inoculation in Floating Treatment Wetlands

et al. 2020

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Diesel oil is considered a very hazardous fuel due to its adverse effect on the aquatic ecosystem, so its remediation has become the focus of much attention. Taking this into consideration, the current study was conducted to explore the synergistic applications of both plant and bacteria for cleaning up of diesel oil contaminated water. We examined that the application of floating treatment wetlands (FTWs) is an economical and superlative choice for the treatment of diesel oil contaminated water. In this study, a pilot scale floating treatment wetlands system having diesel oil contaminated water (1% w/v), was adopted using Cyperus laevigatus L and a mixture of hydrocarbons degrading bacterial strains; viz., Acinetobacter sp.61KJ620863, Bacillus megaterium 65 KF478214, and Acinetobacter sp.82 KF478231. It was observed that consortium of hydrocarbons degrading bacteria improved the remediation of diesel oil in combination with Cyperus laevigatus L. Moreover, the performance of the FTWs was enhanced by colonization of bacterial strains in the root and shoot of Cyperus laevigatus L. Independently, the bacterial consortium and Cyperus laevigatus L exhibited 37.46% and 56.57% reduction in diesel oil, respectively, while 73.48% reduction in hydrocarbons was exhibited by the joint application of both plant and bacteria in FTWs. Furthermore, microbial inoculation improved the fresh biomass (11.62%), dry biomass (33.33%), and height (18.05%) of plants. Fish toxicity assay evaluated the effectiveness of FTWs by showing the extent of improvement in the water quality to a level that became safe for living organisms. The study therefore concluded that Cyperus laevigatus L augmented with hydrocarbons degrading bacterial consortium exhibited a remarkable ability to decontaminate the diesel oil from water and could enhance the FTWs performance.

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“…These spent rinsing effluents, which contain dyes and other chemical additives, are highly toxic to both living species and the aqueous environment [7]. If discharged without appropriate treatments, they can severely deteriorate the aquatic ecosystem [8], ultimately resulting in harmful effects on humans [9]. Therefore, water savings and wastewater treatment in the textile manufacturing industry have attracted growing attention [10].…”

Section: Introductionmentioning

confidence: 99%

Removal of Reactive Dyes in Textile Effluents by Catalytic Ozonation Pursuing on-Site Effluent Recycling

Shang

Chiu

2019

Molecules

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The textile wash-off process consumes substantial amounts of water, which generates large volumes of wastewater that pose potential pollution issues for the environment. In the present study, catalytic ozonation was applied to degrade residual dyes present in rinsing effluents from wash-off processes towards the aim of recycling the waste effluents. A magnetic catalyst was prepared for promoting dye degradation by catalytic ozonation. Via a hydrothermal reaction, highly magnetic manganese ferrite (MnFe2O4) particles were successfully loaded on carbon aerogel (CA) materials (MnFe2O4@CA). The results showed that the developed catalyst strikingly promoted the degradation of dye contaminants by catalytic ozonation, in terms of color removal and reduction of chemical oxidation demand (COD) in rinsing effluents. COD removal efficiency in catalytic ozonation was enhanced by 25% when compared with that achieved by ozonation alone under the same treatment conditions. Moreover, we confirmed that after catalytic ozonation, the rinsing effluents could be recycled to replace fresh water without any evident compromise in the color quality of fabrics. The color difference (ΔEcmc(2:1)) between fabrics treated with recycled effluents and water was not more than 1.0, suggesting that the fabrics treated with recycled effluents displayed acceptable color reproducibility. Although colorfastness and color evenness of fabrics treated with recycled effluents were slightly poorer than those of fabrics treated with water, they were still within the acceptable tolerance. Therefore, the present study validated that catalytic ozonation was a promising technology for saving water and wastewater elimination in textile dyeing. It provides a feasibility assessment of catalytic ozonation for recycling waste effluents to reduce water dependence in textile production. Furthermore, we show a new perspective in on-site recycling waste effluents by catalytic ozonation and enrich the knowledge on feasible approaches for water management in textile production.

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On-site performance of floating treatment wetland macrocosms augmented with dye-degrading bacteria for the remediation of textile industry wastewater

Cited by 121 publications

References 44 publications

Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration

Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration

Cyperus laevigatus L. Enhances Diesel Oil Remediation in Synergism with Bacterial Inoculation in Floating Treatment Wetlands

Removal of Reactive Dyes in Textile Effluents by Catalytic Ozonation Pursuing on-Site Effluent Recycling

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