Entegre biyofilm aktif çamur ardışık kesikli reaktör (EBAÇ- AKR) ile C, N, ve P giderim performansının farklı çözünmüş oksijen derişimlerinde araştırılması

Öz

Evsel atıksuların arıtımında klasik aktif çamur sistemleri, yüz yılı aşkın bir süredir standart bir yöntem olarak kullanılmaktadır. Ancak günümüzde, su kaynaklarının korunmasına yönelik artan hassasiyet, yalnızca karbon gideriminin yeterli olmasını engellemiş; azot ve fosfor gibi besin maddelerinin de giderimini kaçınılmaz hale getirmiştir. Bu doğrultuda, etkinliği artırılmış ve sürdürülebilirliği esas alan yeni arıtım yaklaşımlarının geliştirilmesi, araştırmacıların öncelikli hedeflerinden biri olmuştur. Bu çalışmada, farklı çözünmüş oksijen (ÇO) düzeylerinin (0.5-6.0 mg/L) Entegre Sabit Biyofilm Aktif Çamur Sistemi- ardışık kesikli reaktör (EBAÇ-AKR) sisteminde tek fazda karbon (C), azot(N) ve fosfor (P) giderimine etkisi araştırılmıştır. %30 destek materyali dolgu oranıyla çalıştırılan reaktörde, sentetik ve gerçek atıksu kullanılmıştır. Gerçek atıksu ile yapılan çalışmalarda orta düzey ÇO (3–3.5 mg/L) seviyelerinde, kimyasal oksijen ihtiyacı (KOİ) ve toplam azot (TN) gideriminde en yüksek verimi sağlamış (sırasıyla %93 ve %79); fosfat fosforu ("P" "O" _"4" ^"-3" "-P" ) giderimi ise %59 ile sınırlı kalmıştır. Ayrıca pH, ÇO ve oksidasyon-reduksiyon potansiyeli (ORP) değişimlerinin on-line izlenmesinin, biyolojik süreçlerin arıtım performansının kontrol edilmesinde bir araç olarak kullanımı da gerçekleştirilmiştir. Sonuç olarak çalışma EBAÇ-AKR sisteminin, optimize koşullarda sürdürülebilir bir arıtma alternatifi olacağı göstermiştir.

Anahtar Kelimeler

• AKR
• Arıtım
• Atıksu
• EBAÇ
• Nütrient

Investigation of C, N, and P removal performance with an ntegrated fixed-film activated sludge-sequencing batch reactor (IFAS-SBR) under different dissolved oxygen concentrations

Öz

Conventional activated sludge systems have been employed as a standard method for the treatment of domestic wastewater for over a century. However, the growing emphasis on the protection of water resources has rendered the removal of carbon alone insufficient, making the removal of nutrients such as nitrogen and phosphorus inevitable. Accordingly, the development of enhanced and sustainability-oriented treatment approaches has become one of the primary objectives of researchers. In this study, the effect of different dissolved oxygen (DO) levels (0.5–6.0 mg/L) on the simultaneous removal of carbon (C), nitrogen (N), and phosphorus (P) in an Integrated Fixed-Film Activated Sludge–Sequencing Batch Reactor (IFAS–SBR) operated in a single phase was investigated. The reactor was operated at a 30% filling ratio of support media and fed with both synthetic and real wastewater. Under real wastewater conditions, medium DO levels (3–3.5 mg/L) provided the highest removal efficiencies for chemical oxygen demand (COD) and total nitrogen (TN) (93% and 79%, respectively), while phosphate-phosphorus ("P" "O" _"4" ^"3-" "-P)" removal remained limited at 59%. Furthermore, the on-line monitoring of pH, DO, and oxidation–reduction potential (ORP) was employed as a tool for controlling the performance of biological processes. Overall, the study demonstrated that the IFAS–SBR system can serve as a sustainable treatment alternative under optimized conditions.

Anahtar Kelimeler

• SBR
• Treatment
• Wastewater
• IFAS
• Nutrient

Kaynakça

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