Color, organic matter and sulfate removal from textile effluents by anaerobic and aerobic processes

Amaral, Fernanda Magalhães; Kato, Mário T.; Florêncio, Lourdinha; Gavazza, Sávia

doi:10.1016/j.biortech.2014.04.026

Cited by 86 publications

(53 citation statements)

References 25 publications

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“…In comparison, at 6-h HRT, the removal efficiency decreased significantly to 24 % (547 mg/L in effluent). This lower COD removal efficiency also observed in others (Oh et al 2004;Amaral et al 2014) and can be associated with the presence of hardly biodegradable compounds as well as the possible toxic effects of dyestuffs and sodium chloride in real dyeing wastewater on the microbial activity. Wang et al (2008) showed the degradation of some complicated pollutants present in printing and dyeing wastewaters was better using the UASB reactor (COD removal, 35 %) compared to the anaerobic acidogenic unit (COD removal, 4 %), at the same HRT (15 h).…”

Section: Resultssupporting

confidence: 67%

“…Zou (2015) recently developed a hybrid method combining ozonation, activated carbon, and biological aerated filter (BAF) for the advanced treatment of dyeing wastewater for reuse, despite the high cost for ozonation. In comparison, the biological approaches to treat dyeing wastewater were reported successful by employing anaerobic/aerobic (Brown and Hamburger 1987;Shaw et al 2002;Amaral et al 2014), facultative anaerobic (Li and Xi 2004), and anaerobic (Senthilkumar et al 2011) processes to remove aromatic amines formed from the azo-bond dyestuff. The aerobic sludge granules highly concentrated with microorganisms (Kolekar et al 2012), the redox mediator (Rios-Del Toro et al 2013), and the PVA immobilization media (Chen et al 2003) had been applied for the removal of color from dyeing wastewater.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced bioremoval of refractory compounds from dyeing wastewater using optimized sequential anaerobic/aerobic process

Bae

Han

Kim

et al. 2016

Int. J. Environ. Sci. Technol.

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The upflow anaerobic sludge blanket process followed by the biological aerated filter process was employed to improve the removal of color and recalcitrant compounds from real dyeing wastewater. The highest removal efficiency for color was observed in the anaerobic process, at 8-h hydraulic retention time, seeded with the sludge granule. In the subsequent aerobic process packed with the microbe-immobilized polyethylene glycol media, the removal efficiency for chemical oxygen demand increased significantly to 75 %, regardless of the empty bed contact time. The average influent non-biodegradable soluble chemical oxygen demand was 517 mg/L, and the average concentration in effluent from the anaerobic reactor was 363 mg/L, suggesting the removal of some recalcitrant matters together with the degradable ones. The average nonbiodegradable soluble chemical oxygen demand in effluent from the aerobic reactor was 87, 93, and 118 mg/L, with the removal efficiency of 76, 74, and 67 %, at 24-, 12-, and 8-h empty bed contact time, respectively. The combined anaerobic sludge blanket and aerobic cell-entrapped process was effective to remove the refractory compounds from real dyeing wastewater as well as in reducing organic loading to meet the effluent discharge limits. This integrated process is considered an effective and economical treatment technology for dyeing wastewater.

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Section: Resultssupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Enhanced bioremoval of refractory compounds from dyeing wastewater using optimized sequential anaerobic/aerobic process

Bae

Han

Kim

et al. 2016

Int. J. Environ. Sci. Technol.

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“…It is estimated that approximately 15% of the dyestuffs are lost in industrial effluents during manufacturing processes (Ghodbane and Hamdaoui 2009). Such estimation indicates that 100 L of wastewater are produced for every kilogram of textile product, which is equivalent to 3.7 million liters each day worldwide (Amaral et al 2014). The release of this colored effluent into environment affects the aesthetic properties of aquatic environments, interferes with the growth of bacteria, and causes chronic health effects to living organisms due to their toxicity and mutagenicity (Gunukula and Tittlebaum 2001).…”

Section: Introductionmentioning

confidence: 99%

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Buthiyappan

Raman

Daud

2016

Reviews in Chemical Engineering

212

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AbstractIn the past few years, there have been many researches on the use of different types of homogenous catalyst for the degradation of textile wastewater in conventional advanced oxidation processes (AOPs). However, homogenous AOPs suffer from few limitations, including large consumption of chemicals, acidic pH, high cost of hydrogen peroxide, generation of iron sludge, and necessity of post-treatment. Therefore, recently, there have been more researches that focus on improving the performance of conventional AOPs using heterogeneous catalysts such as titanium dioxide, nanomaterials, metal oxides, zeolite, hematite, goethite, magnetite, and activated carbon (AC). Besides, different supports such as AC that have been incorporated with transition metals and clays have been proven to have excellent catalytic activity in AOPs. This paper presents a comprehensive review of advances and prospects of catalytic AOPs for the decontamination of a wide range of synthetic and real textile wastewater. This review provides an up-to-date critical review of the information on the degradation of various textile dyes by a wide range of heterogeneous catalysts and adsorbents. The future challenges of AOPs, including chemical consumption, toxicity assessment, reactor design, and limitation of catalysts, are discussed in this paper. In addition, this paper also discusses the presence of ions, generation of by-products, and industrial applications of AOPs. Special emphasis is given to recent studies and large-scale combination of AOPs for wastewater treatment. This review paper concludes that more studies are needed for the kinetics, reactor design, and modeling of hybrid AOPs and the production of their corresponding intermediate products and secondary pollutants. A better economic model should also be developed to predict the cost of AOPs, as the treatment cost varies with dyes and textile effluents.

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“…In addition, textile effluent contains high levels of sulfates and high salinity, which inhibit biological treatment. Indeed, Amaral et al (2014) attributed the poor performance of a system composed of a bioreactor followed by a SAB reactor, for color and organic matter removal, was due to the combination of both factors. The nature of the species present (Cl − , for example) in the effluent is extremely important as it may be transformed into other species that may increase (or decrease) the rate/efficiency of the overall treatment process.…”

Section: Introductionmentioning

confidence: 98%

Photo-assisted electrochemical degradation of simulated textile effluent coupled with simultaneous chlorine photolysis

Florêncio

Araújo

Antonelli

et al. 2016

Environ Sci Pollut Res

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The influence of chloride ion concentration during the photo-assisted electrochemical degradation of simulated textile effluent, using a commercial Ti/Ru0.3Ti0.7O2 anode, was evaluated. Initially, the effect of applied current and supporting electrolyte concentration on the conversion of chloride ions to form reactive chlorine species in 90 min of experiment was analyzed in order to determine the maximum production of reactive chlorine species. The optimum conditions encountered (1.5 A and 0.3 mol dm(-3) NaCl) were subsequently employed for the degradation of simulated textile effluent. The efficiency of the process was determined through the analysis of chemical oxygen demand (COD), total organic carbon (TOC), of the presence of organochlorine products and phytotoxicity. Photo-assisted electrochemical degradation was more efficient for COD and TOC removal than the electrochemical technique alone. With simultaneous UV irradiation, a reduced quantity of reactive chlorine was produced, indicating that photolysis of the chlorine species led to the formation of hydroxyl radicals. This fact turns a simple electrochemical process into an advanced oxidation process.

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Color, organic matter and sulfate removal from textile effluents by anaerobic and aerobic processes

Cited by 86 publications

References 25 publications

Enhanced bioremoval of refractory compounds from dyeing wastewater using optimized sequential anaerobic/aerobic process

Enhanced bioremoval of refractory compounds from dyeing wastewater using optimized sequential anaerobic/aerobic process

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Photo-assisted electrochemical degradation of simulated textile effluent coupled with simultaneous chlorine photolysis

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