Asit kırmızı 14 boyasının elementel kükürt ve metanol bazli reaktörlerde biyolojik indirgenmesi

Bu çalışmada ilk kez elementel kükürt bazlı anaerobik reaktörde Asit Kırmızı 14'ün biyolojik olarak indirgenmesi çalışılmıştır. İki yukarı akışlı paket yataklı reaktör birbirine paralel olarak 95 gün boyunca işletilmiştir. Bu reaktörlerde elektron kaynağı olarak kükürt ve metanol kullanılmış ve kükürt bazlı indirgeme işleminin performansı yaygın bir elektron kaynağı olan metanol ile karşılaştırmalı olarak incelenmiştir. Reaktörler 7 farklı periyotta çalışılmış olup, giriş boya konsantrasyonu 5-10 mg/L’de ve HRT 12-24 sa. olarak ayarlanmıştır. Asit Kırmızı 14 konsantrasyonu girişte 10±0.14 mg/L iken, metanol bazlı reaktörde 1.3±0.2 mg/L'ye, kükürt esaslı reaktörde ise 2.05±0.2 mg/L’ye düşmüştür. Kükürt bu çalışma ile boya indirgeme sürecinde ilk kez kullanılmış ve bu süreçte kükürt oksidasyonunun sülfat ve alkalinite üretimine etkisi ayrıca araştırılmıştır.

Anahtar Kelimeler:

Asit kırmızı 14, Elementel kükürt, Metanol, Biyolojik bozunum, Renk giderme

Biological reduction of acid red 14 by elemental sulfur and methanol-based reactors

In this study for the first time, biological reduction of the Acid Red 14 in elemental sulfur-based anaerobic reactor was studied. Two up-flow packed bed reactors were investigated in parallel for 95 days. Sulfur and methanol were used as electron donors in these reactors and the performance of the sulfur-based reduction process was investigated in comparison with a conventional electron source - methanol. The reactors were operated in 7 different periods, the influent dye concentration was kept at 5-10 mg/L and HRT was set to 12-24 hours. While influent Acid Red 14 concentration was 10±0.14 mg/L, it was reduced to 1.3±0.2 in the methanol-based reactor and 2.05±0.2 in the sulfur-based reactor. Elemental sulfur was used for the first time in and the effect of sulfur oxidation in dye reduction process on sulfate and alkalinity production was also investigated.

Keywords:

Acid red 14, Elemental sulfur, Methanol, Biodegradation, Decolorization,

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