Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü

ÖZGE HANAY (FIRAT Ü. MÜHENDİSLİK F. ÇEVRE MÜHENDİSLİĞİ B.)
AYTEKİN ÇELİK, (FIRAT Ü.)
YUNUS AKSOY (FIRAT Ü.)
AYŞE SAKA
19 12

Proje Grubu: ÇAYDAG Sayfa Sayısı: 78 Proje No: 121Y574 Proje Bitiş Tarihi: 15.03.2023 Metin Dili: Türkçe DOI: 121Y574 İndeks Tarihi: 02-04-2024

Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü

Öz:
Bu proje çalışmasında oksijen transfer verimini arttırmak ve aşırı biyofilm gelişimini önlemek amacıyla farklı oranlarda katılan nano boyutlu sıfır değerlikli demir ile gaz transfer membranları üretilmiş ve membran biyofilm reaktörlerinde kullanılmıştır. Proje kapsamında bir adet nZVI katkısız ve 3 adet ağırlıkça farklı oranlarda (%0.25, %0.5, %0.75) nZVI katkılı gaz transfer membranlarını içeren toplamda 4 adet laboratuvar ölçekli membran biyofilm reaktörler eş zamanlı KOİ ve amonyum oksidasyon performanslarının ve biyofilm kalınlıklarının değerlendirilmesi amacıyla farklı hidrolik bekleme süresi ve oksijen gaz basıncı altında çalıştırılmıştır. Aynı zamanda üretilen membranların fiziko-kimyasal özellikleri belirlenmiştir. nZVI katkısı ile gaz transfer membran yapısında düzensiz yapılar ve makro boşluklar oluşmuştur. Membranda nZVI katkısı arttıkça membran yüzey hidrofilikliği ve porozitede bir artış gözlenirken oksijen transfer verimi ve malzeme sertliğinde bir azalma meydana gelmiştir. Aynı zamanda nZVI ilavesi anti-bakteriyel bir etki sergilememiştir. Yaklaşık 90 gün boyunca 8 farklı periyot ile işletimde olan membran biyofilm reaktörler arasında KOİ giderim verimi açısından belirgin bir fark tespit edilmemiş ve KOİ giderim verimi %70 ile 95 aralığında belirlenmiştir. Amonyum oksidasyon veriminin nZVI katkısından ziyade membran biyofilm reaktörlerdeki işletimsel parametrelerden (hidrolik bekleme süresi, oksijen gaz basıncı) çok daha fazla etkilendiği ve amonyum giderme veriminin %91?den yaklaşık %20?lere kadar düştüğü tespit edilmiştir. Tüm işletme periyotlarının sonunda reaktörlerdeki biyofilm kalınlıkları yaklaşık 700 µm olarak belirlenmiş sadece bir reaktörde 100 µm?lik biyofilm kalınlığında bir azalma gözlenmiştir. Tüm bu sonuçlardan nZVI katkısının beklenilenin aksine anti-bakteriyel bir etki sergilemediği ve gaz transfer membranların önemli bir özelliği olan gaz transfer verimini azalttığı sonucuna varılmıştır.
Anahtar Kelime: membran biyofilm reaktör biyofilm kalınlığı sıfır değerlikli demir nitrifikasyon

The Control of Biofilm Thickness in Zero Valence Nano Iron Based Oxygen Gas Transfer Membrane

Öz:
In this project study, gas transfer membranes were produced with nano-sized zero-valent iron added at different rates in order to increase oxygen transfer efficiency and prevent excessive biofilm development and used in membrane biofilm reactors. Within the scope of the project, a total of 4 laboratory-scale membrane biofilm reactors containing one without nZVI and 3 nZVI-doped gas transfer membranes with different weight ratios (0.25%, 0.5%, 0.75%) were operated at different hydraulic retention time and oxygen pressure in order to evaluate the simultaneous COD and ammonium oxidation performances and biofilm thicknesses. Moreover, the physico-chemical properties of the produced membranes were determined. With the contribution of nZVI, irregular structures and macro-voids were formed in the gas transfer membrane structure. As the nZVI contribution in the membrane increased, an increase in the membrane surface hydrophilicity and porosity was observed, while a decrease in the oxygen transfer efficiency and material hardness occurred. Also, the addition of nZVI did not exhibit an antibacterial effect. There was no significant difference in COD removal efficiency between the membrane biofilm reactors, which were in operation for 8 different periods for approximately 90 days, and the COD removal efficiency was determined in the range of 70 to 95%. It was determined that the ammonium oxidation efficiency was much more affected by the operational parameters (hydraulic residence time, oxygen gas pressure) in membrane biofilm reactors rather than the contribution of nZVI, and the ammonium removal efficiency decreased from 91% to about 20%. At the end of all operating periods, the biofilm thickness in the reactors was determined as approximately 700 µm, and a decrease in biofilm thickness of 100 µm was observed in only one reactor. From all these results, it was concluded that the nZVI additive did not exhibit an anti-bacterial effect contrary to expectations and reduced the gas transfer efficiency, which is an important feature of gas transfer membranes.
Anahtar Kelime: membran biyofilm reaktör biyofilm kalınlığı sıfır değerlikli demir nitrifikasyon

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APA HANAY Ö, ÇELİK A, aksoy y, SAKA A (2023). Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. , 0 - 78. 121Y574
Chicago HANAY ÖZGE,ÇELİK Aytekin,aksoy yunus,SAKA AYŞE Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. (2023): 0 - 78. 121Y574
MLA HANAY ÖZGE,ÇELİK Aytekin,aksoy yunus,SAKA AYŞE Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. , 2023, ss.0 - 78. 121Y574
AMA HANAY Ö,ÇELİK A,aksoy y,SAKA A Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. . 2023; 0 - 78. 121Y574
Vancouver HANAY Ö,ÇELİK A,aksoy y,SAKA A Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. . 2023; 0 - 78. 121Y574
IEEE HANAY Ö,ÇELİK A,aksoy y,SAKA A "Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü." , ss.0 - 78, 2023. 121Y574
ISNAD HANAY, ÖZGE vd. "Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü". (2023), 0-78. https://doi.org/121Y574
APA HANAY Ö, ÇELİK A, aksoy y, SAKA A (2023). Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. , 0 - 78. 121Y574
Chicago HANAY ÖZGE,ÇELİK Aytekin,aksoy yunus,SAKA AYŞE Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. (2023): 0 - 78. 121Y574
MLA HANAY ÖZGE,ÇELİK Aytekin,aksoy yunus,SAKA AYŞE Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. , 2023, ss.0 - 78. 121Y574
AMA HANAY Ö,ÇELİK A,aksoy y,SAKA A Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. . 2023; 0 - 78. 121Y574
Vancouver HANAY Ö,ÇELİK A,aksoy y,SAKA A Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü. . 2023; 0 - 78. 121Y574
IEEE HANAY Ö,ÇELİK A,aksoy y,SAKA A "Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü." , ss.0 - 78, 2023. 121Y574
ISNAD HANAY, ÖZGE vd. "Sıfır Değerlikli Nano Demir Bazlı Oksijen Gaz Transfer Membranında Biyofilm Kalınlığının Kontrolü". (2023), 0-78. https://doi.org/121Y574
Sayfa Oluşturulma Tarihi
24-04-2024 13:1

İLETİŞİM

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