scholarly journals Bacterial Augmented Floating Treatment Wetlands for Efficient Treatment of Synthetic Textile Dye Wastewater

2020 ◽  
Vol 12 (9) ◽  
pp. 3731 ◽  
Author(s):  
Neeha Nawaz ◽  
Shafaqat Ali ◽  
Ghulam Shabir ◽  
Muhammad Rizwan ◽  
Muhammad Bilal Shakoor ◽  
...  
Keyword(s):  
Plant Growth ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Treatment Wetlands ◽  
Textile Dye ◽  
Bacterial Strains ◽  
Bacterial Inoculation ◽  
Removal Rates ◽  
Efficient Treatment ◽  
Floating Treatment Wetlands

Floating treatment wetland (FTW) is an innovative, cost effective and environmentally friendly option for wastewater treatment. The dyes in textile wastewater degrade water quality and pose harmful effects to living organisms. In this study, FTWs, vegetated with Phragmites australis and augmented with specific bacteria, were used to treat dye-enriched synthetic effluent. Three different types of textile wastewater were synthesized by adding three different dyes in tap water separately. The FTWs were augmented with three pollutants degrading and plant growth promoting bacterial strains (i.e., Acinetobacter junii strain NT-15, Rhodococcus sp. strain NT-39, and Pseudomonas indoloxydans strain NT-38). The water samples were analyzed for pH, electrical conductivity (EC), total dissolved solid (TDS), total suspended solids (TSS), chemical oxygen demand (COD), biological oxygen demand (BOD), color, bacterial survival and heavy metals (Cr, Ni, Mn, Zn, Pb and Fe). The results indicated that the FTWs removed pollutants and color from the treated water; however, the inoculated bacteria in combination with plants further enhanced the remediation potential of floating wetlands. In FTWs with P. australis and augmented with bacterial inoculum, pH, EC, TDS, TSS, COD, BOD and color of dyes were significantly reduced as compared to only vegetated and non-vegetated floating treatment wetlands without bacterial inoculation. Similarly, the FTWs application successfully removed the heavy metal from the treated dye-enriched wastewater, predominately by FTWs inoculated with bacterial strains. The bacterial augmented vegetated FTWs, in the case of dye 1, reduced the concentration of Cu, Ni, Zn, Fe, Mn and Pb by 75%, 73.3%, 86.9%, 75%, 70% and 76.7%, respectively. Similarly, the bacterial inoculation to plants in the case of dye 2 achieved 77.5% (Cu), 73.3% (Ni), 83.3% (Zn), 77.5% (Fe), 66.7% (Mn) and 73.3% (Pb) removal rates. Likewise in the case of dye 3, which was treated with plants and inoculated bacteria, the metals removal rates were 77.5%, 73.3%, 89.7%, 81.0%, 70% and 65.5% for Cu, Ni, Zn, Fe, Mn and Pb, respectively. The inoculated bacteria showed persistence in water, in roots and in shoots of the inoculated plants. The bacteria also reduced the dye-induced toxicity and promoted plant growth for all three dyes. The overall results suggested that FTW could be a promising technology for the treatment of dye-enriched textile effluent. Further research is needed in this regard before making it commercially applicable.

scholarly journals CHALLENGES IN TEXTILE WASTEWATER AND CURRENT PALLIATIVE METHODS: AN OVERVIEW

2017 ◽  
Vol 18 (2) ◽  
pp. 71-78
Author(s):  
Ibrahim Adebayo Bello
Keyword(s):  
Oxygen Demand ◽  
Textile Wastewater ◽  
Wastewater Management ◽  
Textile Dye ◽  
Biological Processes ◽  
Dye Wastewater ◽  
High Concentration ◽  
Efficient Treatment ◽  
The Past ◽  
Textile Industries

Effluents from dye and textile industries are highly contaminated and toxic to the environment. High concentration of non-biodegradable compounds contributes to increased biochemical oxygen demand (BOD) and chemical oxygen demand (COD) of the wastewater bodies.  Dyes found in wastewater from textile industries are carcinogenic, mutagenic or teratogenic. Biological processes involving certain bacteria, fungi, activated carbon and carbon nanotubes (CNTs) are promising methods for treating the waste water. These methods are either inefficient or ineffective.  These complexities necessitates search for new approaches that will offset all the shortcomings of the present solutions to the challenges faced with textile wastewater management. This article reviews the past and recent methods used in the treatment of the textile dye wastewater and the future opportunities for efficient treatment of textiles wastewaters.

Remediation of polluted river water by floating treatment wetlands

2018 ◽  
Vol 19 (3) ◽  
pp. 967-977 ◽  
Author(s):  
Munazzam Jawad Shahid ◽  
Razia Tahseen ◽  
Muhammad Siddique ◽  
Shafaqat Ali ◽  
Samina Iqbal ◽  
...  
Keyword(s):  
River Water ◽  
Oxygen Demand ◽  
Treatment Wetlands ◽  
Bacterial Strains ◽  
Aquatic Life ◽  
Polluted River ◽  
Leptochloa Fusca ◽  
Quality Guidelines ◽  
Floating Treatment Wetlands ◽  
Better Than

Abstract In this study, the potential of floating treatment wetlands (FTWs), inoculated with selected bacteria, to ameliorate polluted river water was evaluated. Floating cells were prepared by vegetating plants, Typha domingensis and Leptochloa fusca, on a floating mat. The plants were inoculated with three different pollutant-degrading rhizospheric and endophytic bacterial strains. Significantly greater decrease in chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC) was observed in inoculated FTWs than in the wetlands without bacterial inoculation. However, a slight decrease in pH and EC was seen in most of the treatments. The total nitrogen (TN), nitrate and total phosphorus (TP) contents decreased to 1.77 mg/L, 0.80 mg/L and 0.60 mg/L, respectively. Additionally, the concentration of iron (Fe), nickel (Ni), manganese (Mn), lead (Pb), and chromium (Cr) in the water lowered to 0.41, 0.16, 0.10, 0.25, and 0.08 mg/L, respectively. Overall the performance of T. domingensis was significantly better than L. fusca. The treated effluents meet the water quality guidelines for irrigation and aquatic life. This study revealed that FTWs supplemented with selective bacteria are a promising approach for the restoration and management of polluted river water.

scholarly journals Implementation of Floating Treatment Wetlands for Textile Wastewater Management: A Review

2020 ◽  
Vol 12 (14) ◽  
pp. 5801
Author(s):  
Fan Wei ◽  
Munazzam Jawad Shahid ◽  
Ghalia S. H. Alnusairi ◽  
Muhammad Afzal ◽  
Aziz Khan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Textile Wastewater ◽  
Pollutant Removal ◽  
Treatment Wetlands ◽  
Textile Effluent ◽  
Bacterial Strains ◽  
Incomplete Removal ◽  
Essential Components ◽  
Floating Treatment Wetlands ◽  
Selection Of

The textile industry is one of the most chemically intensive industries, and its wastewater is comprised of harmful dyes, pigments, dissolved/suspended solids, and heavy metals. The treatment of textile wastewater has become a necessary task before discharge into the environment. The textile effluent can be treated by conventional methods, however, the limitations of these techniques are high cost, incomplete removal, and production of concentrated sludge. This review illustrates recent knowledge about the application of floating treatment wetlands (FTWs) for remediation of textile wastewater. The FTWs system is a potential alternative technology for textile wastewater treatment. FTWs efficiently removed the dyes, pigments, organic matter, nutrients, heavy metals, and other pollutants from the textile effluent. Plants and bacteria are essential components of FTWs, which contribute to the pollutant removal process through their physical effects and metabolic process. Plants species with extensive roots structure and large biomass are recommended for vegetation on floating mats. The pollutant removal efficiency can be enhanced by the right selection of plants, managing plant coverage, improving aeration, and inoculation by specific bacterial strains. The proper installation and maintenance practices can further enhance the efficiency, sustainability, and aesthetic value of the FTWs. Further research is suggested to develop guidelines for the selection of right plants and bacterial strains for the efficient remediation of textile effluent by FTWs at large scales.

scholarly journals Eco-Friendly Degradation of Blue Reactive Dye Enriched Textile Water by Floating Treatment Wetlands (FTWs) System (Part A)

2020 ◽  
Vol 63 (3) ◽  
Author(s):  
Muhammad Qamar Tusief ◽  
Mumtaz Hasan Malik ◽  
Hafiz Naeem Asghar ◽  
Muhammad Mohsin
Keyword(s):  
Retention Time ◽  
Reactive Dye ◽  
Treatment Wetlands ◽  
Pistia Stratiotes ◽  
Textile Dye ◽  
Bacterial Strains ◽  
Physico Chemical ◽  
System Part ◽  
Floating Treatment Wetlands ◽  
Chemical Strategies

Enriched effluents of textile dye are considered highly complex and containing hazardous components. Their discharge to nearby drains without treatment has high risk to environmental and human health. The physico-chemical strategies under practice to treat these effluents have technical and economical restrictions. Comparatively, biological treatment methods like floating treatment wetlands are less expensive and eco-friendly. Blue reactive dye enriched textile water and prepared synthetically and added to an artificial Floating Treatment Wetlands (FTWs) system vegetated with Eichhornia crassipes and Pistia stratiotes aquatic plants along with Bacillus cereus and Bacillus subtilis bacterial strains. Plant-microbe synergistic effect was studied by measuring the physico-chemical parameters i.e. pH, EC, TDS and TSS of dye enriched water after 0 (at the start of the experiment), 24, 48 and 72 h retention time. A substantial decrease in all these factors (11.34 %, 40.67 %, 64.37 %, 58.23 %, for pH, EC, TDS and TSS respectively) was noted for E. crassipes and B. cereus combination after 72 h retention time. This high lighted the fact that plant assisted microbial FTWs technique can be a unique approach to remediate the textile effluents.

scholarly journals Eco-Friendly Degradation of Reactive Blue Dye Enriched Textile Water by Floating Treatment Wetlands (FTWs) System Applying the Strategy of Plant-Bacteria Partnership (Part-B)

2020 ◽  
Vol 63 (1) ◽  
pp. 40-47
Author(s):  
Muhammad Qamar Tusief ◽  
Mumtaz Hasan Malik ◽  
Muhammad Mohsin ◽  
Hafiz Naeem Asghar ◽  
Muhammad Iqbal ◽  
...  
Keyword(s):  
Textile Wastewater ◽  
Treatment Wetlands ◽  
Blue Dye ◽  
Textile Dye ◽  
Physico Chemical ◽  
Floating Treatment Wetlands

Textile dye enriched effluents have been credited to be heavily polluted and highly hazardous to environment. Cleaning of textile wastewater from these dangerous pollutants is a deeply concerned issue of the industry. Various physico-chemical and biological techniques are being practiced to remediate these effluents. But all these strategies have limitations at any corner of their application.

scholarly journals Growth response of wheat cultivars to bacterial inoculation in calcareous soil

2010 ◽  
Vol 56 (No. 12) ◽  
pp. 570-573 ◽  
Author(s):  
D. Egamberdieva
Keyword(s):  
Plant Growth ◽  
Calcareous Soil ◽  
Dry Weight ◽  
Plant Growth Promoting Bacteria ◽  
Wheat Cultivars ◽  
Bacterial Strains ◽  
Bacterial Inoculation ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Selection Of

In this study the plant growth-promoting bacteria were analysed for their growth-stimulating effects on two wheat cultivars. The investigations were carried out in pot experiments using calcareous soil. The results showed that bacterial strains Pseudomonas spp. NUU1 and P. fluorescens NUU2 were able to colonize the rhizosphere of both wheat cultivars. Their plant growth-stimulating abilities were affected by wheat cultivars. The bacterial strains Pseudomonas sp. NUU1 and P. fluorescens NUU2 significantly stimulated the shoot and root length and dry weight of wheat cv. Turon, whereas cv. Residence was less affected by bacterial inoculation. The results of our study suggest that inoculation of wheat with Pseudomonas strains can improve plant growth in calcareous soil and it depends upon wheat cultivars. Prior to a selection of good bacterial inoculants, it is recommended to select cultivars that benefit from association with these bacteria.

Remediation of sewage and industrial effluent using bacterially assisted floating treatment wetlands vegetated with Typha domingensis

2016 ◽  
Vol 74 (9) ◽  
pp. 2192-2201 ◽  
Author(s):  
Amna Ijaz ◽  
Zafar Iqbal ◽  
Muhammad Afzal
Keyword(s):  
Environmental Quality ◽  
Industrial Wastewater ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Sewage Water ◽  
Quality Parameters ◽  
Treatment Wetlands ◽  
Polluted Water ◽  
Typha Domingensis ◽  
Floating Treatment Wetlands

This investigation reports the quantitative assessment of endophyte-assisted floating treatment wetlands (FTWs) for the remediation of sewage and industrial wastewater. Typha domingensis was used to vegetate FTWs that were subsequently inoculated with a consortium of pollutant-degrading and plant growth-promoting endophytic bacteria. T. domingensis, being an aquatic species, holds excellent potential to remediate polluted water. Nonetheless, investigation conducted on Madhuana drain carrying industrial and sewage water from Faisalabad City revealed the percentage reduction in chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) to be 87% and 87.5%, respectively, within 96 h on coupling the plant species with a consortium of bacterial endophytes. With the endophytes surviving in plant tissue, maximal reduction was obtained in not only the aforementioned pollution parameters but for other major environmental quality parameters including nutrients (N and P), ions (Na+ and K+), Cl−, and SO42− as well, which showed percentage reductions up to 90%, 39%, 77%, 91.8%, 40%, and 60%, respectively. This significant improvement in polluted wastewater quality treated with the proposed method render it safe to be discharged freely in larger water bodies as per the National Environmental Quality Standards (NEQS) of Pakistan or to be reused safely for irrigation purposes; thus, FTWs provide a sustainable and affordable approach for in situ remediation of sewage and industrial wastewater.

scholarly journals Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1569
Author(s):  
Nosheen Akhtar ◽  
Noshin Ilyas ◽  
Humaira Yasmin ◽  
R. Z. Sayyed ◽  
Zuhair Hasnain ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Seed Germination ◽  
Plant Growth ◽  
Bacillus Cereus ◽  
Contaminated Soil ◽  
Metal Tolerance ◽  
Heavy Metal Tolerance ◽  
Bacterial Strains ◽  
Bacterial Inoculation ◽  
Phytoextraction Potential

Plant growth-promoting rhizobacteria (PGPR) mediate heavy metal tolerance and improve phytoextraction potential in plants. The present research was conducted to find the potential of bacterial strains in improving the growth and phytoextraction abilities of Brassica nigra (L.) K. Koch. in chromium contaminated soil. In this study, a total of 15 bacterial strains were isolated from heavy metal polluted soil and were screened for their heavy metal tolerance and plant growth promotion potential. The most efficient strain was identified by 16S rRNA gene sequencing and was identified as Bacillus cereus. The isolate also showed the potential to solubilize phosphate and synthesize siderophore, phytohormones (indole acetic acid, cytokinin, and abscisic acid), and osmolyte (proline and sugar) in chromium (Cr+3) supplemented medium. The results of the present study showed that chromium stress has negative effects on seed germination and plant growth in B. nigra while inoculation of B. cereus improved plant growth and reduced chromium toxicity. The increase in seed germination percentage, shoot length, and root length was 28.07%, 35.86%, 19.11% while the fresh and dry biomass of the plant increased by 48.00% and 62.16%, respectively, as compared to the uninoculated/control plants. The photosynthetic pigments were also improved by bacterial inoculation as compared to untreated stress-exposed plants, i.e., increase in chlorophyll a, chlorophyll b, chlorophyll a + b, and carotenoid was d 25.94%, 10.65%, 20.35%, and 44.30%, respectively. Bacterial inoculation also resulted in osmotic adjustment (proline 8.76% and sugar 28.71%) and maintained the membrane stability (51.39%) which was also indicated by reduced malondialdehyde content (59.53% decrease). The antioxidant enzyme activities were also improved to 35.90% (superoxide dismutase), 59.61% (peroxide), and 33.33% (catalase) in inoculated stress-exposed plants as compared to the control plants. B. cereus inoculation also improved the uptake, bioaccumulation, and translocation of Cr in the plant. Data showed that B. cereus also increased Cr content in the root (2.71-fold) and shoot (4.01-fold), its bioaccumulation (2.71-fold in root and 4.03-fold in the shoot) and translocation (40%) was also high in B. nigra. The data revealed that B. cereus is a multifarious PGPR that efficiently tolerates heavy metal ions (Cr+3) and it can be used to enhance the growth and phytoextraction potential of B. nigra in heavy metal contaminated soil.

scholarly journals Low-Cost Single Chamber MFC Integrated With Novel Lignin-Based Carbon Fiber Felt Bioanode for Treatment of Recalcitrant Azo Dye

2021 ◽  
Vol 9 ◽  
Author(s):  
Masoom Fatima ◽  
Yohannes Kiros ◽  
Robina Farooq ◽  
Rakel W. Lindström
Keyword(s):  
Carbon Fiber ◽  
Chemical Oxygen Demand ◽  
Low Cost ◽  
Oxygen Demand ◽  
Operation Time ◽  
Side Reaction ◽  
Textile Wastewater ◽  
Geobacter Sulfurreducens ◽  
Efficient Treatment ◽  
Carbon Fiber Felt

A flow through anaerobic microbial fuel cell (MFC) was designed and optimized for efficient treatment of recalcitrant textile wastewater. The membrane-less MFC was first time fabricated with a unique combination of electrodes, a novel bioanode of synthesized lignin-based electrospun carbon fiber supporting a biofilm of Geobacter sulfurreducens for acetate oxidation and an air-breathing cathode, consisting of a pyrolyzed macrocycle catalyst mixture on carbon bonded by polytetrafluoroethylene (PTFE). The effects of different organic loadings of acetate along with Acid Orange (AO5), operation time and ionic strength of auxiliary salts (conductivity enhancers) were investigated and responses in terms of polarization and degradation were studied. In addition, the decomposition of the organic species and the degradation of AO5 along with its metabolites and degraded products (2-aminobenzenesulfonic acid) were determined by chemical oxygen demand (COD) analysis, UV-Vis spectrophotometry and high-performance liquid chromatography (UV-HPLC) techniques. SEM and TEM images were also used to find out the biocompatibility of the microbes on lignin-based electrospun carbon felt anode and the morphology of the cathode. Reduction and breakage of the azo bond of AO5 occurs presumably as a side reaction, resulting in the formation of 2-aminobenzenesulfonic acid and unidentified aromatic amines. Maximum current density of anode 0.59 Am−2 and power density of 0.12 Wm−2 were obtained under optimized conditions. As a result, decolouration of AO5 and chemical oxygen demand (COD) removal efficiency was 81 and 58%, respectively. These results revealed that the low-cost MFC assembly can offer significant potential for anaerobic decolouration of recalcitrant textile wastewater.

scholarly journals Development of floating treatment wetlands with plant-bacteria partnership to clean textile bleaching effluent

2019 ◽  
Vol 70 (06) ◽  
pp. 502-511 ◽  
Author(s):  
MUHAMMAD TUSIEF QAMAR ◽  
HUSSAN MALIK MUMTAZ ◽  
MUHAMMAD MOHSIN ◽  
HAFIZ NAEEM ASGHAR ◽  
MUHAMMAD IQBAL ◽  
...  
Keyword(s):  
Textile Industry ◽  
Textile Wastewater ◽  
Effluent Treatment ◽  
Treatment Wetlands ◽  
Pistia Stratiotes ◽  
Treated Wastewater ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Floating Treatment Wetlands

Treatment of textile wastewater prior to its discharge into the environment is a highly concerned issue of the industry. The current established methods in textile industry for effluent treatment are typically high in cost, require range of chemicals along with the generation of concentrated hazardous sludge. It is therefore inevitable to look for economical and eco-friendly ways to treat textile wastewater. Hence, the present study was endeavored to develop green, chemical free and sustainable bacteria inoculated plant based technique for remedying textile bleaching effluents. A lab scale floating treatment wetlands (FTWs) system was developed and implemented for remediation of H2O2 based textile bleaching wastewater. This system was designed by vegetating two free floating aquatic plants Eichhorniacrassipes and Pistia stratiotes. The performance of this system was enhanced by inoculating two pollutant degrading and plant growth promoting bacteria, Bacillus cereus and Bacillus subtilis. The efficacy of this bacterial augmented FTWs system was assessed by monitoring physicochemical parameters of treated wastewater. A substantial decrease in pH, EC, TDS, TSS, BOD and COD was noted. This stamped the effectiveness of this sustainable technique to treat textile effluents.

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