Comparison of tertiary treatment by nanofiltration and reverse osmosis for water reuse in denim textile industry

Amar, N.; Kechaou, Noura; Palmeri, John; Deratani, A.; Sghaier, Ali

doi:10.1016/j.jhazmat.2009.04.130

Cited by 101 publications

(24 citation statements)

References 17 publications

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“…Podem-se classificar os corantes pelo modo de fixação à fibra como: ácidos, reativos, diretos, azóicos, dispersivos, à cuba e pré-metalizados, dos quais os únicos que não se aplicam à indústria têxtil são os pré-metalizados e os básicos [7]. Na literatura são encontrados diferentes métodos que são utilizados para tratar efluentes aquosos coloridos [8][9][10][11]. Não existe um método geral para descoloração de efluentes aquosos da indústria têxtil.…”

Section: Introductionunclassified

Estudo e caracterização de propriedades da argila esmectita na remoção de corantes têxteis

Mello¹,

Gama²,

Ferreira³

et al. 2013

Matéria (Rio J.)

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RESUMOO processo na indústria têxtil, principalmente nas etapas de tingimento e acabamento, requer um grande volume de água. A eliminação desses produtos tóxicos é atualmente um dos mais importantes assuntos em controle de poluição, o que tem levado os pesquisadores a buscar novas técnicas e ferramentas mais poderosas para diminuir ou eliminar a toxicidade dos efluentes líquidos formado em seus distintos processos, sempre levando em conta a eficiência, baixo custo e as regulamentações e legislações voltadas à proteção ambiental. Neste trabalho foi avaliada a aplicação de um resíduo argiloso em processos de tratamento de efluentes de indústrias têxteis para remoção de corantes. Foi realizado um estudo de caracterização do adsorvente através da análise da área superficial e do volume poroso (BET), assim como também a análise de presença de minerais do grupo da esmectita (difração de raios-X). Também foi realizada a otimização do processo adsortivo através da técnica de planejamento fatorial para os corantes Nylosan Azul Brilhante e Azul Anil Op. A análise de BET mostrou que o tratamento térmico provocou uma redução na área superficial de 13,3%, todavia provocou um aumento no tamanho dos poros de 21,2%. A análise dos difratogramas de raios X das amostras in natura indicou a presença dos grupos minerais esmectita, caulinita e mica (ilita). Foi observada, ainda, a participação do mineral quartzo (d001 = 3,35 Å) no conjunto dos minerais presentes na argila. Com o auxílio do planejamento fatorial para os dois corantes, verificou-se a influência significativa no processo da variável massa, velocidade de agitação e temperatura. Obtiveram-se resultados satisfatórios na redução da concentração por adsorção, mostrando-se que a amostra em estudo é eficaz para a remoção dos corantes ácido Nylosan Blue e reativo Azul anil Op. Palavras-chave: adsorção, corantes, argilas. ABSTRACTThe textile industry process, especially in dyeing and finishing steps, requires a large volume of water. The elimination of these toxic products is currently one of the most important subjects in pollution control, which has led researchers to seek new techniques and more powerful tools to reduce or eliminate the toxicity of wastewater formed in its different processes, always taking into account efficiency, low costs and the laws and regulations aimed at environmental protection. In this study we evaluated the application of a clay waste in processes of wastewater treatment for removal of textile dyes. A study was conducted to characterize the adsorbent through the analysis of surface area and pore volume (BET), as well as the analysis of the presence of smectite group minerals (X-ray diffraction). The optimization of the adsorptive process through the technique of factorial design was used. The BET analysis showed that the heat treatment caused a reduction in the surface area of 13.3%. However caused an increase of 21.16% in the pore size. The analysis of X-ray diffractograms of the samples indicated in nature, therefore, the presence of mineral grou...

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Section: Introductionunclassified

Estudo e caracterização de propriedades da argila esmectita na remoção de corantes têxteis

Mello¹,

Gama²,

Ferreira³

et al. 2013

Matéria (Rio J.)

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“…Membrane treatment is also promising alternative for textile wastewater however, its main drawback is the generation of highly polluted concentrate during operation [5], [6] Increasing environmental awareness and strict regulations put pressure on the effective treatment of membrane concentrate. So far, a few reports have been released on the treatment of membrane concentrate from textile waste water [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ozonation on Anaerobic Organic Removal from Membrane Concentrate

Yaman¹,

Çakmakçı²,

Özkaya³

et al. 2013

JOCET

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Abstract-This study was focused on anaerobic treatment of textile wastewater. In this research, treatability of concentrate from nanofiltration of textile wastewater. Results indicated that membrane concentrate could be effectively treated with bacterial treatment. Moreover it can be said that both fermantors were approximately the same in terms of removal efficiencies. According to the experiment of results chemical oxygen demand (COD) and and biochemical oxygen demand (BOD 5 ) removal efficiency were around 65% and 80%, respectively. Methane and cumulative biogas production almost the same both for ozonated and non ozonated concentrate.

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“…In industrial wastewater treatment, NF is a more attractive process because it operates at a lower pressure (about half the pressure required for a reverse osmosis system) but maintains the same flux, resulting in lower energy costs and investment savings on a lower pressure pump and piping (Amar et al, 2009;García-Figueruelo et al, 2009). The effectiveness of the separation process depends on many factors including the type and surface charge characteristics of the membrane used, module configuration, mode of operation, operating pressure, temperature, feed pH, feed flow rate, feed concentration and percentage of product recovery (Benítez et al, 2009;Boricha and Murthy, 2009;Lau and Ismail, 2009).…”

Section: Introductionmentioning

confidence: 99%

Treatment of welding electrode manufacturing plant wastewater using coagulation/flocculation-nanofiltration as a hybrid process

Golestani

Mousavi

Borghei

2011

Braz. J. Chem. Eng.

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-High water consumption and water scarcity make industrial wastewater reuse necessary, especially in those industries characterized by polluted effluents such as welding electrode manufacturing industries. The present paper investigates the coupling of coagulation-flocculation with nanofiltration (NF) to recycle water and reuse it in the process. First, the effect of different concentrations of a mixture of alum (Al 2 (SO 4 ) 3 .18H 2 O) and ferric chloride (FeCl 3 ) on the pretreatment process was closely studied. Then the NF process was applied for complementary treatment. The NF results show that, by increasing both flow rate and transmembrane pressure (TMP), permeate flux is increased. The NF results also show that the COD value decreases below 2 mg/l, TDS rejection approaches 82%, turbidity decreases below 1 NTU and the hardness is lower than the factory constraint (100 mg/l as CaCO 3 ), allowing the reuse of the treated wastewater in the process.

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Comparison of tertiary treatment by nanofiltration and reverse osmosis for water reuse in denim textile industry

Cited by 101 publications

References 17 publications

Estudo e caracterização de propriedades da argila esmectita na remoção de corantes têxteis

Estudo e caracterização de propriedades da argila esmectita na remoção de corantes têxteis

Effect of Ozonation on Anaerobic Organic Removal from Membrane Concentrate

Treatment of welding electrode manufacturing plant wastewater using coagulation/flocculation-nanofiltration as a hybrid process

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