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 ( ) 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  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

1. [1] Yu RF, Liaw SL, Chang CN, Lu HJ, Cheng WY. “Monitoring and control using on-line ORP on the continuous-flow activated sludge batch reactor system”. Water Science and Technology, 35(1), 57-66, 1997.
2. [2] Metcalf & Eddy Inc. Wastewater Engineering. Treatment and Resource Recovery. 5th ed. New York, USA, McGraw-Hill Education, 2014.
3. [3] Waqas S, Bilad MR, Man Z, Wibisono Y, Jaafar J, Mahlia TMI, Khan AL, Aslam M. “Recent progress in integrated fixed-film activated sludge process for wastewater treatment: A review”. Journal of Environmental Management, 268, 110718, 2020.
4. [4] Lan Z, Zhang Y, Liang R, Wang Z, Sun J, Lu X, He Y. “Comprehensive comparison of integrated fixed-film activated sludge (IFAS) and AAO activated sludge methods: Influence of different operational parameters”. Chemosphere, 357, 142068, 2024.
5. [5] Sriwiriyarat T, Ungkurarate W, Fongsatitkul P, Chinwetkitvanich S. “Effects of dissolved oxygen on biological nitrogen removal in integrated fixed-film activated sludge (IFAS) wastewater treatment process”. Journal of Environmental Science and Health Part A, 43(5), 518-527, 2008.
6. [6] Bian X, Wu Y, Li J, Yin M, Li D, Pei H, Chang S, Guo W. “Effect of dissolved oxygen on high C/N wastewater treatment in moving bed biofilm reactors based on heterotrophic nitrification and aerobic denitrification: Nitrogen removal performance and potential mechanisms”. Bioresource Technology, 365, 128147, 2022.
7. [7] Qin L, Wang D, Zhang Z, Li X, Chai G, Lin Y, Liu C, Cao R, Song Y. “Impact of dissolved oxygen on the performance and microbial dynamics in side-stream activated sludge hydrolysis process”. Water, 15(11), 1977, 2023.
8. [8] Navada SH, Knutsen MF, Bakke I, Vadstein O. “Nitrifying biofilms deprived of organic carbon show higher functional resilience to increases in carbon supply”. Scientific Reports, 10(1), 7121, 2020.

9. [9] Zajac O, Zubrowska-Sudol M. “Nitrification kinetics, N2O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates”. International Journal of Environmental Science and Technology, 20(9), 10061-10074, 2023.
10. [10] Zhang Y, Qiu X, Luo J, Li H, How SW, Wu D, He J, Cheng Z, Gao Y. “A review of the phosphorus removal of polyphosphate-accumulating organisms in natural and engineered systems”. Science of the Total Environment, 912, 169103, 2024.
11. [11] Aghilinasrollahabadi KH, Saffari Ghandehari SH, Kjellerup BV, Nguyen C, Saavedra Y. “Assessing the performance of polyphosphate accumulating organisms in a full-scale side-stream enhanced biological phosphorous removal”. Water Environment Research, 96(1), 1-148, 2024.
12. [12] Sharma A, Bhatti M. “Simultaneous removal of organic matter and nutrients from high strength organic wastewater using sequencing batch reactor (SBR)”. Processes, 10(10), 1903, 2022.
13. [13] Tuo Z, Bai L, Zhang B, Jing S, Li C, Tang S. “Characteristics of nitrogen removal from an integrated fixed-film activated sludge (IFAS) system and the relationship between activated sludge and biofilm interactions”. Water, 16(21), 3040, 2024.
14. [14] Hassan KH, Hamdy O, Helmy M. “Enhancing treated wastewater effluent characteristics using hybrid biofilm/activated sludge process-a case study”. Water Science and Technology, 81(2), 217-227, 2020.
15. [15] Xu X, Liu GH, Li Q, Wang H, Sun X, Shao Y, Zhang J, Liu SH, Luo F. “Optimization nutrient removal at different volume ratio of anoxic-to-aerobic zone in integrated fixed-film activated sludge (IFAS) system”. Science of the Total Environment, 795, 148824, 2021.
16. [16] Zeynep A, Isik M. “Pharmaceutically active compounds in water, Aksaray, Turkey”. CLEAN-Soil, Air, Water, 43(10), 1381-1388, 2015.
17. [17] Pingxiang Bestn Chemical Packing. “K1 K2 K3 K5 Bio Filter Media PE01 PE04 PE05 PE10 for MBBR”. https://www.bestnpacking.com/k1-k2-k3-k5-bio-filter-media-pe01-pe04-pe05-pe10-for-product/ [01.11.2024].
18. [18] Isik M. “Efficiency of simulated textile wastewater decolorization process based on the methanogenic activity of upflow anaerobic sludge blanket reactor in salt inhibition condition”. Enzyme and Microbial Technology, 35(5), 399-404, 2004.
19. [19] Shao Y, Shi Y, Mohammed A, Liu Y. “Wastewater ammonia removal using an integrated fixed-film activated sludge-sequencing batch biofilm reactor (IFAS-SBR): Comparison of suspended flocs and attached biofilm”. International Biodeterioration and Biodegradation, 116, 38-47, 2017.
20. [20] Qasim SR, Zhu G. Wastewater Treatment and Reuse: Theory and Design Examples, Volume 1: Principles and Basic Treatment. Boca Raton, FL, USA, CRC Press, 2017.
21. [21] Kuśnierz M, Domańska M, Hamal K, Pera A. “Application of integrated fixed-film activated sludge in a conventional wastewater treatment plant”. International Journal of Environmental Research and Public Health, 19(10), 5985, 2022.
22. [22] Bui QC, Phan NNM, Nguyen TV, Yang CC, Chen KF, Tsai YP. “Integrating suspended sludge and fixed film into a biological wastewater treatment system to enhance nitrogen removal”. Processes, 12(10), 2131, 2024.
23. [23] Chang CH, Hao OJ. “Sequencing batch reactor system for nutrient removal: ORP and pH profiles”. Journal of Chemical Technology and Biotechnology, 67(1), 27-38, 1996.
24. [24] Lee DS, Jeon CO, Park JM. “Biological nitrogen removal with enhanced phosphate uptake in a sequencing batch reactor using single sludge system”. Water Research, 35(16), 3968-3976, 2001.