Melike KOZAK, Serdar GÖÇER, Ahmet DUYAR, İrem AYRANPINAR, Emre Oğuz KÖROĞLU, Kevser CIRIK

KALDNES K1 ÜZERİNDE BİYOFİLM OLUŞUMUNUN İNCELENMESİ

Hareketli yataklı biyofilm reaktörünün (HYBR), belediye ve endüstriyel atık suların arıtılması için etkili bir sistem olduğu kanıtlanmıştır. Hareketli yataklı biyofilm reaktörlerinin (HYBR) ana çalışma mekanizması, aerobik biyoreaktörlerde difüzörler veya anoksik/anaerobik biyoreaktörlerde mekanik karıştırıcılar tarafından sağlanan karıştırma ile biyoreaktördeki biyofilm taşıyıcılarında bağlı biyokütlenin büyümesidir. Biyofilm oluşumu, mikrobiyal bileşim ve özelliklerden etkilenen karmaşık bir süreçtir. Bu çalışmada, tekstil atıksu kullanılarak iki hareketli yataklı biyofilm reaktöründe (AnHYBR1 ve AnHYBR2) Kaldnes K1 üzerinde biyofilm oluşturma performansı araştırılmıştır. %40 doluluk oranına sahip her iki MBBR de 6 saatlik hidrolik tutma süresi (HRT) ile çalıştırılmıştır. AnHYBR1 anaerobik koşullar altında çalıştırılırken, AnHYBR2 farklı havalandırma oranlarında (0,001-0,004 m3hava/m3rektör) çalıştırılmıştır. En yüksek biyokütle konsantrasyonu, 4062 mg/L'ye karşılık gelen 0,004 m3hava/m3reaktör havalandırma oranıyla AnHYBR2'de gözlenmiştir. Sonuçlar, sınırlı havalandırmanın anaerobik koşullardan ziyade biyofilm taşıyıcıları üzerinde biyofilm oluşumunu iyileştirdiğini göstermiştir.

Anahtar Kelimeler:

AnHYBR, Biyofilm, Kaldnes K1, Tekstil atıksuyu

INVESTIGATION OF BIOFILM FORMATION ON KALDNES K1

The moving bed biofilm reactor (MBBR) has proven to be an effective system for the treatment of municipal and industrial wastewater. The main operating mechanism of moving bed biofilm reactors (MBBR) is the growth of attached biomass in biofilm carriers in the bioreactor with mixing provided by diffusers in aerobic bioreactors or mechanical stirrers in anoxic/anaerobic bioreactors. Biofilm formation is a complex process affected by microbial composition and properties. In this study, biofilm formation performance on Kaldnes K1 was investigated in two moving bed biofilm reactors (AnMBBR1 and AnMBBR2) using textile wastewater. Both MBBRs with a 40% fill rate were operated with a 6-hour hydraulic retention time (HRT). AnMBBR1 was operated under anaerobic conditions while AnMBBR2 was operated at different aeration rates (0.001-0.004 m3 air/m3reactor). The highest biomass concentration was observed in AnMBBR2 with a reactor aeration ratio of 0.004 m3air/m3reactor, corresponding to 4062 mg/L. The results showed that limited aeration improved biofilm formation on biofilm carriers rather than anaerobic conditions.

Keywords:

AnMBBR, Biofilm, Kaldnes K1, Textile wastewater,

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