FARKLI DEZENTEGRASYON YÖNTEMLERİYLE İŞLEM GÖRMÜŞ ÇAMURLARIN ÇÖZÜNEBİLİRLİKLERİNİN VE SUYUNU VERME ÖZELLİKLERİNİN DEĞERLENDİRİLMESİ

Öz

Çamur dezentegrasyon yöntemleri özellikle atık çamurların anaerobik çürütülmesinden önce ön arıtım yöntemi olarak kullanılmakta ve çeşitli çamur özelliklerinde iyileşmeler sağlayabilmektedir. Bu çalışmada, konserve gıda üretimi yapan bir işletmenin atıksu arıtma tesisinden alınan atık aktif çamura hidrodinamik kavitasyon, asidik dezentegrasyon ve alkali dezentegrasyon yöntemleri uygulanmış, çözünebilir kimyasal oksijen ihtiyacı (ÇKOİ), kapiler emme süresi (KES) ve santrifüjlenebilir çökelebilirlik indeksi (SÇİ) değerlerinde meydana gelen değişimler incelenmiş ve uygulanan yöntemlerin, çamur çözünebilirliği ile susuzlaştırılabilirliği üzerindeki etkileri kıyaslanmıştır. Çalışmada çamura uygulanan tüm dezentegrasyon yöntemleri atık aktif çamurun çözünebilirliğini olumlu yönde etkilemiş ve çamurdaki ÇKOİ konsantrasyonunu önemli derecede arttırmıştır. Uygulanan yöntemler içerisinde çamurun çözünebilirliğini en fazla arttıran yöntemlerin hidrodinamik kavitasyon ve alkali dezentegrasyon (pH 11) olduğu tespit edilmiştir. Diğer yandan çamurun çözünebilirliğini en fazla arttıran bu yöntemlerin çamurun KES ve SÇİ değerlerini de arttırdığı, yani çamurun su verme performansını olumsuz yönde etkilediği sonucuna ulaşılmıştır.

Anahtar Kelimeler

• Atık aktif çamur
• çamur dezentegrasyonu
• kapiler emme süresi
• çözünebilir KOİ
• santrifüjlenebilir çökelebilirlik indeksi

Evaluation of the Solubility and Dewaterability of Sludges Treated with Different Disintegration Methods

Öz

Sludge disintegration methods are particularly used as pretreatment techniques prior to the anaerobic digestion of waste sludge, and they can improve various sludge characteristics. In this study, hydrodynamic cavitation, acidic disintegration, and alkaline disintegration methods were applied to waste activated sludge obtained from a wastewater treatment plant of a canned food production facility. The changes in soluble chemical oxygen demand (SCOD), capillary suction time (CST), and centrifugal settleability index (CSI) were examined, and the effects of the applied methods on sludge solubility and dewaterability were compared. All disintegration methods applied in the study positively influenced the solubility of waste activated sludge and significantly increased the SCOD concentration in the sludge. Among the applied methods, hydrodynamic cavitation and alkaline disintegration (at pH 11) were found to be the most effective in increasing sludge solubility. On the other hand, these methods, which significantly increased sludge solubility, were also found to increase CST and CSI values, indicating a negative impact on the dewatering performance of the sludge.

Anahtar Kelimeler

• Waste activated sludge
• sludge disintegration
• capillary suction time
• soluble COD
• centrifugal settleability index

Kaynakça

1. Abdelrahman, A.M., Tebyani, S., Talabazar, F.R., Tabar, S.A., Berenji, N.R., Aghdam, A.S., Koyuncu, I., Kosar, A., Guven, H., Ersahin, M.E., Ghorbani, M. ve Ozgun, H. (2024) The flow pattern effects of hydrodynamic cavitation on waste activated sludge digestibility, Chemosphere, 357, 141949. doi:10.1016/j.chemosphere.2024.141949
2. APHA, AWWA, WEF, (1998) Standard Methods for the Examination of Water and Wastewater, 20th ed., American Public Health Association, Baltimore.
3. Becerra, G., Flor, Y., Acosta, E. J., ve Grant Allen, D. (2010) Alkaline extraction of wastewater activated sludge biosolids, Bioresource Technology, 101(18), 6972-6980. doi:10.1016/j.biortech.2010.04.021
4. Cai, M., Hu, J., Lian, G., Xiao, R., Song, Z., Jin, M., Dong, C., Wang, Q., Luo, D., Wei, Z. (2018) Synergetic pretreatment of waste activated sludge by hydrodynamic cavitation combined with Fenton reaction for enhanced dewatering, Ultrasonics – Sonochemistry, 42, 609-618. doi:10.1016/j.ultsonch.2017.11.046.
5. Cao, B., Zhang, T., Zhang, W. ve Wang, D. (2021) Enhanced technology based for sewage sludge deep dewatering: A critical review, Water Research, 189, 116650. doi:10.1016/j.watres.2020.116650.
6. Chen, G.W., Lin, W.W. ve Lee, D.J. (1996) Capillary suction time (CST) as a measure of sludge dewaterability, Water Science and Technology, 34(3-4), 443-448. doi:10.1016/0273- 1223(96)00610-5.
7. Chen, N., Tao, S., Xiao, K., Liang, S. Yang, J. ve Zhang, L. (2020) A one-step acidification strategy for sewage sludge dewatering with oxalic acid, Chemosphere, 238, 124598. doi:10.1016/j.chemosphere.2019.124598
8. de Sousa, T.A., do Monte, F.P., do Nascimento Silva, J.V., Silva Lopes, W., Leite, V.D., van Lier, J.B. ve de Sousa, J.T. (2021) Alkaline and acid solubilisation of waste activated sludge, Water Science and Technology, 83(12), 2980-2996. doi:10.2166/wst.2021.179

9. Doğan, C. ve Şen, Ü. (2017) Hidrodinamik kavitasyon kullanılarak arıtma çamurlarından siloksan giderilmesi, VII. Ulusal Hava Kirliliği ve Kontrolü Sempozyumu, 1-3 Kasım 2017- Antalya.
10. Feng, X., Deng, J., Lei, H., Bai, T., Fan, Q. ve Li, Z. (2009). Dewaterability of waste activated sludge with ultrasound conditioning, Bioresource Technology, 100(3), 1074-1081. doi:10.1016/j.biortech.2008.07.055
11. Ferrer, I., Passos, F., Romero, E., V´azquez, F. ve Font, X. (2024) Optimising sewage sludge anaerobic digestion for resource recovery in wastewater treatment plants, Renewable Energy, 224. 120123. doi:10.1016/j.renene.2024.120123.
12. He, D.-Q., Zhang, Y.-J., He, C.-S. ve Yu, H.-Q. (2017) Changing profiles of bound water content and distribution in the activated sludge treatment by NaCl addition and pH modification, Chemosphere, 186, 702-708. doi:10.1016/j.chemosphere.2017.08.045
13. Hu, J., Li, Z., Zhang, A., Mao, S., Jenkinson, I.R. ve Tao, W. (2020) Using a strong chemical oxidant, potassium ferrate (K2FeO4), in waste activated sludge treatment: A review, Environmental Research, 188. 109764. doi:10.1016/j.envres.2020.109764
14. Jin, L., Zhang, G. ve Zheng, X. (2015) Effects of different sludge disintegration methods on sludge moisture distribution and dewatering performance, Journal of Environmental Sciences, 28, 22-28. doi:10.1016/j.jes.2014.06.040
15. Kavacık, B. ve Dölgen, D. (2023) Isıl işlem ile modifiye edilmiş arıtma çamuru kullanılarak sabit yataklı kolonda arsenik ve antimon giderimi, Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, 38(1), 629-638. doi:10.17341/gazimmfd.1020632
16. Li, H., Jin, Y., Mahar, R.B., Wang, Z. ve Nie, Y. (2008) Effects and model of alkaline waste activated sludge treatment, Bioresource Technology, 99, 5140-5144. doi: 10.1016/j.biortech.2007.09.019
17. Li, X., Chen, L., Ji, Y., Li, M., Dong, B., Qian, G., Zhou, J. ve Dai, X. (2020) Effects of chemical pretreatments on microplastic extraction in sewage sludge and their physicochemical characteristics, Water Research, 171, 115379. doi:10.1016/j.watres.2019.115379
18. Liu, J., Yang, Q., Wang, D., Li, X., Zhong, Y., Li, X., Deng, Y., Wang, L., Yi, K. ve Zeng, G. (2016a) Enhanced dewaterability of waste activated sludge by Fe(II)-activated peroxymonosulfate oxidation, Bioresource Technology, 206, 134-140. doi:10.1016/j.biortech.2016.01.088
19. Liu, Y., Wang, L., Ma, J., Zhao, X., Huang, Z., Mahadevan, G.D. ve Qi, J. (2016b) Improvement of settleability and dewaterability of sludge by newly prepared alkaline ferrate solution, Chemical Engineering Journal, 287, 11-18. doi:10.1016/j.cej.2015.11.037
20. Liew, C.S, Raksasat, R., Rawindran, H., Worapon Kiatkittipong, W., Lima, J.W., Leong, W.H., Lam, M.K., Mohamad, M., Cheng, Y.W. ve Chong, C.C. (2022) Hydrolysis kinetics for solubilizing waste activated sludge at low temperature thermal treatment derived from multivariate non-linear model, Desalination and Water Treatment, 199, 99-106. doi:10.1016/j.chemosphere.2021.133478
21. Mancuso, G., Langone, M., Andreottola, G. ve Bruni, L. (2019) Effects of hydrodynamic cavitation, low-level thermal and low-level alkaline pre-treatments on sludge solubilisation, Ultrasonic Sonochemistry, 59, 104750. doi:10.1016/j.ultsonch.2019.104750
22. Nazif, S., N., Mehrdadi, N., Zare, S. ve Mosavari, S. (2016) Improvement and prediction of OSA system performance in sludge reduction through integration with thermal and mechanical treatment, Water Science and Technology, 74(9), 2087-2096. doi:10.2166/wst.2016.385
23. Niu, M., Zhang, W., Wang, D., Chen, Y. ve Chen, R. (2013) Correlation of physicochemical properties and sludge dewaterability under chemical conditioning using inorganic coagulants, Bioresource Technology, 144, 337-343. doi:10.1016/j.biortech.2013.06.126
24. Petkovšek, M., Mlakar, M., Levstek, M., Stražar, M., Širok, B. ve Dular, M. (2015) A novel rotation generator of hydrodynamic cavitation for waste-activated sludge disintegration, Ultrasonics Sonochemistry, 26, 408-414. doi:10.1016/j.ultsonch.2015.01.006
25. Rao, B., Tu, H., Jia, H., Ding, Z., Xu, P., Zhang, Y., Lu, X., Hu, L., Yao, R., Ren, W. ve Qin, X. (2024) The cooperative effect of mechanical dewatering and thermal drying for activated sludge deep reduction, Process Safety and Environmental Protection, 185, 9-20. doi:10.1016/j.psep.2024.02.053
26. Rashvanlou, R.B., Pasalari, H., Moserzadeh, A.A., Farzadkia, M. (2022) A combined ultrasonic and chemical conditioning process for upgrading the sludge dewaterability, International Journal of Environmental Analytical Chemistry, 102(7), 1613-1626. doi:10.1080/03067319.2020.1739668
27. Sammer, O., Ghobrial, F., A1-Musalnia, S. ve Hamoda, M.F. (1990) Wastewater sludge characteristics in relation to potential dewatering technologies - a case study, Journal of Environmental Science and Health Part A : Environmental Science and Engineering and Toxicology,(4), 367-379. doi:10.1080/10934529009375564
28. Skripsts, E., Klaucans, E. ve Mezule, L. (2024) Organic mass and protein extraction from secondary sewage sludge via multi-step physical alkali- and acid-based treatment, Frontiers in Chemical Engineering, 6, 1346736. doi: 10.3389/fceng.2024.1346736.
29. Şahinkaya, S. ve Sevimli, M.F. (2013) Mathematical modelling of alkaline sludge disintegration, Nevşehir Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2(1), 46-57.
30. Topac, F.O., Caliskan Eleren, S. ve Yalili Kilic, M. (2024) Sustainable Innovations in Sludge Dewatering for Enhanced Waste Management Efficiency, International Studies in Engineering, Serüven Yayınevi, 103-129. ISBN: 978-625-6644-80-9.
31. Vesilind, P.A. (1979) Treatment and disposal of wastewater sludge (Revised addition). Michigan: Ann Arbor Science Publishers Inc.
32. Wolski, P. (2020) The effect of ultrasonic disintegration on sewage sludge conditioning, Desalination and Water Treatment, 199, 99-106. doi: 10.5004/dwt.2020.26333
33. Xia, T., Zhang, X., Chen, D., Gao, Z., Ji, Y., Xia, J. ve Wang, L. (2023) Effects of ceramsite derived from sewage sludge combined with the O3–FeCl3/PAM process on the dewatering of waste-activated sludge and investigation of dewatering mechanisms, Water Science and Technology, 88(2), 367-380. doi: 10.2166/wst.2023.224
34. Xu, Y., Hu, F., Wang, F., Qu, Y., Xu, L. ve Liu, Q. 2021. Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment, Water Science and Technology, 83(8), 1824-1833. doi:10.2166/wst.2021.107
35. Yang, X., Fan, D., Gu, W., Liu, J., Shi, L., Zhang, Z., Zhou, L. ve Ji, G. (2021) Aerobic and anaerobic biodegradability of organophosphates in activated sludge derived from kitchen garbage biomass and agricultural residues, Frontiers in Bioengineering and Biotechnology, 9, 649049. doi: 10.3389/fbioe.2021.649049
36. Yu, H., Yang, Y., Wu, X., Yuan, W., Wang, H., Deng, H., Sun, L. ve Li, R. (2022) Phosphorus migration and transformation in activated sludge by ultrasonic treatment, Sustainability, 14(18), 11224. doi:10.3390/su141811224
37. Zieliński, M., Dębowski, M., Kazimierowicz, J., Nowicka, A. ve Dudek, M. (2024) Application of hydrodynamic cavitation in the disintegration of aerobic granular sludgeevaluation of pretreatment time on biomass properties, anaerobic digestion efficiecy and energy balance. Energies, 17, 335. doi:10.3390/en17020335