Treatment efficiency of color and COD in textile wastewater using a combined coagulation and AOPs/UV process
,
,
,
and
*
Article Sidebar
Full Text: 
PDF
Abstract
This study aimed to evaluate the efficiency of color and chemical oxygen demand (COD) removal in textile wastewater by the combined coagulation and advanced oxidation process using UV and ozone (AOPs/UV-O₃). The experimental procedure consisted of three steps: fabrication of a treatment model, determination of optimal conditions for coagulation, and investigation of factors affecting the efficiency of AOPs/UV-O₃. The results showed that the coagulation process achieved optimal efficiency at pH = 6,5 with a dosage of PAC 600 mg/L and Polymer Anion 4 mg/L, achieving a removal efficiency of 71,4% for color and 55% for COD. The AOPs/UV-O₃ stage was performed with a reaction time of 40 minutes and continuous UV irradiation to improve the treatment efficiency, achieving a total removal efficiency of 81,4% for color and 87% for COD. The results provide a set of effective operational parameters that can be applied to enhance the performance of textile wastewater treatment systems, contributing to the advancement of efficient and environmentally friendly treatment technologies.
Tóm tắt
Nghiên cứu này được thực hiện nhằm đánh giá hiệu quả xử lý độ màu và nhu cầu oxy hóa học (COD) trong nước thải dệt nhuộm bằng quy trình kết hợp keo tụ và oxy hóa nâng cao sử dụng tia UV và ozone (AOPs/UV-O₃). Quy trình thực nghiệm gồm ba bước: chế tạo mô hình xử lý, xác định điều kiện tối ưu cho quá trình keo tụ, và khảo sát các yếu tố ảnh hưởng đến hiệu suất AOPs/UV-O₃. Kết quả cho thấy, quá trình keo tụ đạt hiệu quả tối ưu tại pH = 6,5 với liều lượng PAC 600 mg/L và Polymer Anion 4 mg/L, đạt hiệu suất loại bỏ 71,4% độ màu và 55% COD. Giai đoạn AOPs/UV-O₃ thực hiện với thời gian phản ứng 40 phút và chiếu UV liên tục giúp nâng cao hiệu quả xử lý, đạt tổng hiệu suất loại bỏ 81,4% đối với độ màu và 87% đối với COD. Kết quả cung cấp các thông số vận hành hiệu quả, có thể được áp dụng để cải thiện hệ thống xử lý nước thải dệt nhuộm, điều này góp phần định hướng phát triển công nghệ xử lý hiệu quả và thân thiện với môi trường.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
References
Abiola, O. N. (2018). Polymers for coagulation and flocculation in water treatment. In Polymeric materials for clean water. Cham: Springer International Publishing, 77-92. https://doi.org/10.1007/978-3-030-00743-0_4
Awad, M., Li, F., & Hongtao, W. (2013). Application of natural clays and poly aluminium chloride (PAC) for wastewater treatment. International Journal of Research and Reviews in Applied Sciences, 15(2), 287–291.
Dao, M. T., Nguyen, N. V. C., & Ngo, D. K. (2016). Investigating the effectiveness of chemical coagulants and bio-coagulantsin textile wastewater treatment. Ho Chi Minh City University of Education Science Journal, 9(87), 127 (in Vietnamese).
Ghoreishi, S. M., & Haghighi, R. (2003). Chemical catalytic reaction and biological oxidation for treatment of non-biodegradable textile effluent. Chemical Engineering journal, 95(1-3), 163-169.
https://doi.org/10.1016/S1385-8947(03)00100-1
GilPavas, E., Dobrosz-Gómez, I., & Gómez-García, M. Á. (2017). Coagulation-flocculation sequential with Fenton or Photo-Fenton processes as an alternative for the industrial textile wastewater treatment. Journal of Environmental Management, 191, 189–197. https://doi.org/10.1016/j.jenvman.2017.01.015
Hassaan, M. A., & El Nemr, A. (2017). Advanced oxidation processes for textile wastewater treatment. International Journal of Photochemistry and Photobiology, 2(3), 85–93.
Ho, H., & Watanabe, T. (2017). Distribution and removal of nonylphenol ethoxylates and nonylphenol from textile wastewater—A comparison of a cotton and a synthetic fiber factory in Vietnam. Water, 9(6), 386.
https://doi.org/10.3390/w9060386
Hoang, H. T. T., Nguyen, H. T., Tran, S. T., & Thai, V. P. (2024). Evaluation of methylene blue dye (MB) removal from aqueous solution using biochar synthesized from disposable bamboo chopsticks. Can Tho University Journal of Science, 60(3), 62–72 (in Vietnamese). https://doi.org/10.22144/ctujos.2024.310
Holkar, C. R., Jadhav, A. J., Pinjari, D. V., Mahamuni, N. M., & Pandit, A. B. (2016). A critical review on textile wastewater treatments: possible approaches. Journal of Environmental Management, 182, 351–366. https://doi.org/10.1016/j.jenvman.2016.07.090
Islam, M. R., & Mostafa, M. G. (2020). Characterization of textile dyeing effluent and its treatment using polyaluminum chloride. Applied Water Science, 10(5), 1-10. https://doi.org/10.1007/s13201-020-01204-4
Le, V. H., & Nguyen, N. V. C. (2018). Wastewater Treatment Engineering Textbook (Volume 2). Can Tho University Publishing House (in Vietnamese).
Lee, C. S., Robinson, J., & Chong, M. F. (2014). A review on application of flocculants in wastewater treatment. Process safety and environmental protection, 92(6), 489-508. https://doi.org/10.1016/j.psep.2014.04.010
Luong, T. H. V., Cao, H. L. N., Dang, G. H., Tran, Q. T. B., Le, D. T. N., & Pham, Q. T. B. (2022). Evaluation of methylene blue removal using an adsorbent synthesized from coir pith by modified Hummers method. Can Tho University Science Journal, 58(2), 59–101 (in Vietnamese). https://doi.org/10.22144/ctu.jvn.2022.039
Mahmudabadi, Z. T., Ebrahimi, A. A., Eslami, H., Mokhtari, M., Salmani, M. H., Ghaneian, M. T., & Pakdaman, M. (2018). Optimization and economic evaluation of modified coagulation–flocculation process for enhanced treatment of ceramic-tile industry wastewater. AMB Express, 8, 1-12.
https://doi.org/10.1186/s13568-018-0702-4
Manna, M., & Sen, S. (2023). Advanced oxidation process: a sustainable technology for treating refractory organic compounds present in industrial wastewater. Environmental Science and Pollution Research, 30(10), 25477-25505. https://doi.org/10.1007/s11356-022-19435-0
Metcalf, L., & Eddy, H. P. (2003). Wastewater Engineering: Treatment and Reuse (4th ed.). McGraw-Hill, New York.
Mohajerani, M., Mehrvar, M., & Ein-Mozaffari, F. (2009). An overview of the integration of advanced oxidation technologies and other processes for water and wastewater treatment. International Journal of Engineering, 3(2), 120–146.
Nguyen, A. T., Pham. H. K., & Nguyen, T. T. (2020a). Treating textile wastewater by combination of advanced oxidation process and UV light. Journal of Science Of Lac Hong University, 9, 47-52 (in Vietnamese).
Nguyen, D. T. P., Lu, Y. T., & Pham, T. N. T. (2020b). Research on the application of advanced oxidation method combining ozone and UV rays in the treatment of textile wastewater in Pho Noi industrial park. Environmental Magazine, IV(December), 22–26 (in Vietnamese).
Nguyen. D. T., Doan, T. T., Dong, O. T., & Nguyen, T. P. (2017). Textile wastewater treatment by fococagulation method combined with advanced fenton oxidation. Journal of Analytical Chemistry, Physics and Biology, 22(4), 89-107 (in Vietnamese).
Perkowski, J., & Kos, L. (2003). Decolouration of model dyehouse wastewater with advanced oxidation processes. Fibres and Textiles in Eastern Europe, 11(3), 67–71.
Tianzhi, W., Weijie, W., Hongying, H., & Khu, S. T. (2021). Effect of coagulation on bio-treatment of textile wastewater: Quantitative evaluation and application. Journal of Cleaner Production, 312, 127798.
https://doi.org/10.1016/j.jclepro.2021.127798
Vajihinejad, V., Gumfekar, S. P., Bazoubandi, B., Rostami Najafabadi, Z., & Soares, J. B. (2019). Water soluble polymer flocculants: synthesis, characterization, and performance assessment. Macromolecular Materials and Engineering, 304(2), 1800526. https://doi.org/10.1002/mame.201800526
Vu, N. T. B., Hoang, H. T. H., & Trinh H. L. (2016). Practical treatment of textile wastewater color by advanced oxidation method. VNU Journal of Science: Natural Sciences and Technology, 32(4), 97–103 (in Vietnamese).
Wang, J. L., & Xu, L. J. (2012). Advanced oxidation processes for wastewater treatment: formation of hydroxyl radical and application. Critical reviews in Environmental Science and Technology, 42(3), 251-325. https://doi.org/10.1080/10643389.2010.507698
Zadeh, K. R. & Malakootian, M. (2017). O₃/UV photo-oxidation for the removal of reactive yellow 3 dye from wastewater. Desalination and Water Treatment, 81, 322–326. https://doi.org/10.5004/dwt.2017.21178
Zhang, Y., Shaad, K., Vollmer, D., & Ma, C. (2021). Treatment of textile wastewater using advanced oxidation processes—a critical review. Water, 13(24), 3515. https://doi.org/10.3390/w13243515