Nghiên cứu chế tạo màng chưng cất để xử lý và tái sử dụng nước thải dệt nhuộm
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Abstract
This study explores the potential of membrane distillation (MD) technology as a one-step process for treating and reusing dye textile wastewater. The research synthesizes MD membranes using a novel H2O/Isoamyl alcohol non-solvent in phase inversion with varying ratios to enhance hydrophobicity, thermal stability, and evaluate water flux and dye removal efficiency. Results showed that the optimal MD membrane, with a 50:50 H2O/Isoamyl alcohol ratio, achieved high water flux (18.05 L/m2 h) and color removal efficiency (99.69%), along with a water recovery of 60.35% after 16 hours of operation. Additionally, the synthesized MD membrane demonstrated approximately 1,3 times higher water flux than the commercial MD membrane due to its greater porosity. The results demonstrated that isoamyl alcohol can improve the long-term performance of MD membranes, offering a sustainable solution for dye recovery and wastewater treatment in the textile industry by utilizing waste heat from dyeing wastewater. Overall, the synthesized MD membrane shows promise as an effective solution to address dye wastewater treatment challenges in Bao Loc's textile sector.
Tóm tắt
Nghiên cứu được thực hiện nhằm khám phá tiềm năng của công nghệ chưng cất màng (Membrane distillation-MD) như quy trình một bước để xử lý và tái sử dụng nước thải nhuộm từ ngành dệt nhuộm.Trong nghiên cứu, việc tổng hợp màng MD được tiến hành bằng cách sử dụng các dung dịch đảo pha có tỉ lệ thể tích H2O/Isoamyl alcohol khác nhau nhằm nâng cao tính kỵ nước, tăng thông lượng dòng nước thấm và hiệu suất loại bỏ độ màu. Kết quả cho thấy, màng MD tối ưu,với tỉ lệ thể tích H2O/Isoamyl alcohol là 50:50, đạt được thông lượng dòng nước thấm cao (18,05 L/m2 h) và hiệu quả loại bỏ độ màu 99,69%,cùng với hiệu suất thu hồi nước đạt 60,35% sau 16 giờ vận hành. Ngoài ra, màng MD tổng hợp trong nghiên cứu này cho thông lượng dòng nước thấm cao hơn khoảng 1,3 lần so với màng MD thương mại nhờ vào độ xốp lớn hơn.Kết quả chứng minh rằng isoamyl alcohol có thể cải thiện hiệu quả của màng MD,mang lại giải pháp bền vững cho việc thu hồi phẩm màu và xử lý nước thải trong ngành dệt bằng cách tận dụng nhiệt thải từ nước thải nhuộm.Một cách tổng thể, màng MD tổng hợp trong nghiên cứu này có triển vọng là giải pháp hiệu quả để giải quyết các thách thức về xử lý nước thải trong ngành dệt nhuộm tại thành phố Bảo Lộc hiện nay.
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