Application of the mixture design to decolourise effluent textile wastewater using continuous stirred bed reactor

Ayed, Lamia; Achour, Sami; Bakhrouf, Amina

doi:10.4314/wsa.v37i1.64102

Cited by 33 publications

(25 citation statements)

References 25 publications

(3 reference statements)

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“…Although the results were unexpected for color and aromatic amines removal, microaeration would be very important to remove other compounds present in textile wastewater, such as adsorbable organic halides (AOX), which are recalcitrant under anaerobic conditions.…”

Section: Resultsmentioning

confidence: 99%

Impact of Microaeration and the Redox Mediator Anthraquinone‐2,6‐Disulfonate on Azo Dye Reduction and By‐Products Degradation

Barros

Silva

Firmino

et al. 2018

CLEAN Soil Air Water

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This work assessed the impact of microaeration and the redox mediator anthraquinone-2,6-disulfonate (AQDS) on both azo dye reduction and by-products degradation (aromatic amines) in a mesophilic reactor. The experiment was carried out in an up-flow anaerobic sludge blanket (UASB) reactor with 3.2 L of working volume and hydraulic retention time (HRT) of 24 h. The synthetic effluent contained 50 mg L À1 of the dye Reactive Red 2 (RR2). The reactor was initially operated under anaerobic conditions and, subsequently, was microaerated with atmospheric air (1 mL min À1 ) and then supplemented with the redox mediator (AQDS) at a concentration of 25 μM. The microaeration effect on dye reduction and by-products formed was not evident. However, AQDS considerably enhanced RR2 reduction, and its regeneration was not affected by the presence of oxygen. It seems that the cleavage of the double bond between nitrogen groups is a much easier way to start the attack of the azo dye, and it is independent of the presence of oxygen. Thus, the introduction of hydroxyl groups into the aromatic ring was not playing a role in the color removal process. In terms of ecological parameters, the ecological niches were maintained, and the distribution of species increased, despite the majority being generalists, i.e., not specialized in dye degradation. Furthermore, anaerobic species are dominant over facultative species, which explains why there was no population diversity recovery after the microaeration started.

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Section: Resultsmentioning

confidence: 99%

Impact of Microaeration and the Redox Mediator Anthraquinone‐2,6‐Disulfonate on Azo Dye Reduction and By‐Products Degradation

Barros

Silva

Firmino

et al. 2018

CLEAN Soil Air Water

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“…Previous works showed that the Malachite Green and Crystal Violet degradation into leucomalachite and leucocrystal violet are equally toxic to the initial compound (Ayed et al . 2010b,d).…”

Section: Resultsmentioning

confidence: 99%

“…The textile industry is the largest user of synthetic dyes consuming about 56% of the total annual world production (7 × 10 5 tons) (Ayed et al . 2010d, 2011a,b). Azo dyes are characterized by one or more azo bonds (N = N) as chromophore, usually linked to benzenic or naphthalenic rings containing lateral OH and/or SO 3 groups (Garcia‐Segura & Brillas ).…”

Section: Introductionmentioning

confidence: 99%

Exploring bioaugmentation strategies for azo dye CI Reactive Violet 5 decolourization using bacterial mixture: dye response surface methodology

Ayed

Békir²,

Achour³

et al. 2016

Water & Environment J

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The use of response surface methodology based on statistical design of experiments is becoming increasingly widespread in several sciences such as analytical and environmental chemistry. In the present study, the decolourization and the degradation efficiency of CI Reactive Violet 5 (CIRV5) was studied using a novel bacterial consortium. CIRV5 (1000 p.p.m.) biodegradation was investigated under shaking condition in mineral salt medium solution (MSM) at a 7.5 pH and a 25°C temperature. The degradation pathways were also predicted, using UV‐visible spectroscopy analysis. Under optimal conditions, the bacterial consortium was able to decolourize the dye completely (>99%) within 8 h. The colour and chemical oxygen demand (COD) removal were 99.29 and 94.93%, respectively. Polymerase chain reaction (PCR) technique was utilized to detect the adhesin genes ‘icaA’ and ‘icaD.’ Our results showed that Staphylococcus aureus had a high decolourization capacity. Phytotoxicity study using Triticum turgidum ssp durum showed the no toxicity of the produced products.

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“…MBR s stem n n tasarımında, l teratürde tekst l atıksuyu arıtımı üzer ne yapılan deneysel çalışmalarda bel rt len tekst l atıksuyunun k rl l k yükler [13,14] V6.2.1'de yapılmıştır. Programlamada, 4 tane ekran tasarlanmıştır.…”

Section: Membran Bi̇yoreaktör Tasarim Hesaplamalari (Membrane Bi̇oreactunclassified

LABORATUVAR/PİLOT ÖLÇEKTE MEMBRAN BİYOREAKTÖR(MBR) SİSTEMİNİN TASARIMI ve İMALATI

Açıkgöz¹

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Bu çalışmada; tekstil atıksuyunun arıtım çalışmalarında kullanılmak üzere laboratuvar/pilot ölçekte Membran Biyoreaktör (MBR) sisteminin tasarımı ve imalatı gerçekleştirilmiştir. Tasarım çalışması; işletme şartlarının belirlenmesi, havalandırma tankının tasarımı, MBR sisteminin mekanik tasarımı ve süreç kontrolü için gerekli olan ekipmanların belirlenmesi olmak üzere dört basamaktan oluşmaktadır. MBR sisteminin tasarımında, literatürde belirtilen tekstil atıksuyunun kirlilik yükleri ve deşarj kriterleri dikkate alınarak kabul değerleri belirlenmiş ve bu değerler hesaplamalarda kullanılmıştır. Tasarım hesaplamalarında; laboratuvar/pilot ölçekteki MBR sisteminin toplam reaktör hacmi 206 L, membran modülünün alanı 1,50 m 2 , kullanılan membran kaseti sayısı 6 adet, üfleç sayısı 1 adet ve difüzör sayısı 1 adet olarak hesaplanmıştır. MBR sisteminin montajı tamamlandıktan sonra sistem devreye alınmıştır. Sistemin çalışma performansı; sentetik tekstil atıksuyunun arıtım çalışmaları yapılarak test edilmiştir. Sistemde 10 günlük arıtım süresine bağlı olarak %68'lik bir KOİ giderimi ve %70 renk giderimi sağlanmıştır. İmalatı gerçekleştirilen MBR sisteminin; tekstil atıksuyu arıtımınındaki kullanılabilirliği ümit vericidir.

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Application of the mixture design to decolourise effluent textile wastewater using continuous stirred bed reactor

Cited by 33 publications

References 25 publications

Impact of Microaeration and the Redox Mediator Anthraquinone‐2,6‐Disulfonate on Azo Dye Reduction and By‐Products Degradation

Impact of Microaeration and the Redox Mediator Anthraquinone‐2,6‐Disulfonate on Azo Dye Reduction and By‐Products Degradation

Exploring bioaugmentation strategies for azo dye CI Reactive Violet 5 decolourization using bacterial mixture: dye response surface methodology

LABORATUVAR/PİLOT ÖLÇEKTE MEMBRAN BİYOREAKTÖR(MBR) SİSTEMİNİN TASARIMI ve İMALATI

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