Color removal from yeast production industry wastewater using photo-fenton process

Abstract

The yeast production industry wastewaters contains high amount of chemical oxygen demand (COD), brownish color and recalcitrant organic components. In this work, one of the yeast production plant wastewaters operating in the Aegean Region, the color removal were studied with using Photo-Fenton (H₂O₂/Fe(II)/UV) oxidation processes. In this study, the Box–Wilson statistical experimental design method applied to optimization of decolorisation of the yeast production industry wastewater. For this reason, the initial oxidant and catalyst concentrations and pH of water were chosen as the experimental parameters on decolorisation. Color removal was observed during the experimental studies. Complete color removal (E=100%) was achieved with the addition of 2400 mg/L H₂O₂ and 121 mg/L Fe(II) at 3.7 pH after 120 min. of exposure to the UV irradiation.

Keywords

• Photo-Fenton oxidation,Box-Wilson,Decolorisation,Yeast production industry

Maya endüstrisi atıksularından foto-fenton yöntemi ile renk giderimi

Öz

Maya üretim endüstrisinin atığı, yüksek miktarda kimyasal oksijen ihtiyacı (KOİ), azot, koyu renk ve biyolojik olarak parçalanmayan organik bileşikler içermektedir. Bu çalışmada, Ege Bölgesi’nde faaliyet gösteren bir maya sanayinin atıksularının, renk giderimi Foto-Fenton (H₂O₂/Fe (II)/UV) oksidasyon yöntemi kullanılarak arıtılmaya çalışılmıştır. Box-Wilson istatistiksel deneysel tasarım yöntemi kullanılarak başlangıç oksidan ve katalizör konsantrasyonları ve suyun pH'sı gibi bazı çalışma parametrelerinin renk giderme üzerindeki etkileri araştırılmıştır. Çalışma süresince renk giderimi izlenmiş ve komple renk giderimi (E=%100) 120 dk. sonra, 3.7 pH'da
2400 mg/L H₂O₂ ve 121 mg/L Fe (II) ilavesinin olduğu UV oksidasyonu işlemi sonucunda elde edilmiştir.

Anahtar Kelimeler

• Foto-Fenton oksidasyou,Box-Wilson,Renk giderimi,Maya endüstrisi

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