Treatment of a simulated textile wastewater containing the azo-dye reactive orange 16 in an anaerobic-biofilm anoxic–aerobic membrane bioreactor

Spagni, Alessandro; Grilli, Selene; Casu, Stefania; Mattioli, Davide

doi:10.1016/j.ibiod.2010.08.004

Cited by 85 publications

(22 citation statements)

References 28 publications

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“…A common industrial detergent (Albatex DBC) was also added. Moreover, NH 4 Cl was added to increase the Total-N value to achieve the recommended COD/N ratio, as reported in literature [15]. The final COD/N ratio of the MTDW was 27:1.…”

Section: Model Textile Dye Wastewater (Mtdw) Compositionsmentioning

confidence: 99%

“…The implementation of membrane (micro-/ultra-filtration) for solids retention into biological treatment system leads to several substantial improvements compared to conventional biological processes [1]. However, application of state-of-the art MBR technology for textile wastewater treatment as a single-step process is rather limited and typically requires downstream post-treatment such as nanofiltration or reverse osmosis systems [2], combined anaerobic-aerobic MBR processes [3,4] or modified MBR membranes.…”

Section: Introductionmentioning

confidence: 99%

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Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment

Deowan

Galiano

Hoinkis

et al. 2016

Journal of Membrane Science

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a b s t r a c tA novel antifouling coating of ultrafiltration (UF) commercial membranes, based on a polymerisable bicontinuous microemulsion (PBM) technique, was developed and tested for the first time in a membrane bioreactor (MBR) using an artificial model textile dye wastewater and compared with a commercial uncoated UF membrane. The results showed that the commercial MBR module faced severe fouling problems whereas the novel coated PBM MBR module reduced the fouling significantly. The analysis of fouling rate using a resistance model confirms that PBM coated membrane has a higher antifouling effect. The antimicrobial properties of the PBM membrane contributed by polymerisable cationic surfactant acryloyloxyundecyltriethylammonium bromide (AUTEAB) guaranteed an anti-biofouling effect preventing the growth of microorganisms on the membrane surface. In addition, the PBM MBR module showed 10 71% higher blue dye removal efficiency and a similar rate of COD removal efficiency of about 957 1% compared to commercial module. However, water permeability was slightly lower due to extra resistance of the PBM coating. Root mean squared (RMS) roughness measurement and analysis of AFM images confirmed that the stable novel membrane coating still existed and showed antimicrobial effect even after 105 days of operation. The results obtained demonstrated the potential of the low fouling PBM membrane.

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Section: Model Textile Dye Wastewater (Mtdw) Compositionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment

Deowan

Galiano

Hoinkis

et al. 2016

Journal of Membrane Science

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“…There is a direct relationship between the HRT of the anaerobic biological treatment unit and the colour removal efficiencies (Johnstrup et al 2011;Karatas et al 2010;Da Silva et al 2012;Oh et al 2004;Spagni et al 2010). For instance, Johnstrup et al (2011) reported increase in the extent of decolourization of Remazol Red RR (initial concentration: 100 mg/L) from 85 to 98 % when HRT of anaerobic batch reactor was increased from 0.5 to 3 days.…”

Section: Hydraulic Retention Time (Hrt)mentioning

confidence: 99%

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Popli

Patel

2014

Int. J. Environ. Sci. Technol.

257

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Dyes are synthetic organic compounds widely used in various industries such as, textile, leather, plastic, food, pharmaceutical, and paints manufacturing industries. Coloured effluents are highly toxic to the aquatic life and mutagenic to humans. Wastewater containing dyes has become an important issue demanding serious attention. Among the synthetic dyes, azo dyes are the largest and most widely used dyes and account for more than half of the annually produced dyes. The biodegradation of azo dyes is difficult due to their complex structure and synthetic nature. Several treatments have been proposed for efficient azo dye removal, most of them presenting some limitations such as generation of waste sludge, high operational costs, poor efficiency, and incomplete mineralization. Biological treatment is a cost-effective and eco-friendly process for dye degradation. Sequential anaerobic-aerobic biological treatment is considered as one of the most cost-effective methods for the complete mineralization of azo dyes. The anaerobic stage yields decolourization through reductive cleavage of the dye's azo linkages, resulting in the formation of generally colourless but potentially hazardous aromatic amines. The aerobic stage involves degradation of the aromatic amines. It is the most logical step for removing the azo dyes from the wastewater. Several factors can influence the microbial activity and consequently the efficacy and effectiveness of the complete biodegradation processes. This paper summarizes the results of biological decolourization of azo dyes using various types of reactors, elaborates biochemical mechanisms involved, and discusses influence of various operational parameters on decolourization based on reports published in the last decade.

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“…Physical methods are effective but have high post operation costs. Chemical methods result in harmful byproducts (Spagni A et al 2010 Subramani et al 2007). Methylene blue is one among the common dyes found in dyeing industry effluent few researchers are worked on methylene blue degradation by nano TiO 2 .…”

Section: Introductionmentioning

confidence: 99%