چکیده مقاله
In this study, the performance of an up flow anaerobic sludge blanket UASB reactor in treating synthetic textile dyeing wastewater containing azo dye Reactive Red 195 was evaluated under three salinity levels of 5, 20, and 35 g/L NaCl over three operational phases 72 days All experiments were conducted at a hydraulic retention time of 24 h and an operating temperature of 32±2 °C Results showed that at 5 g/L NaCl, the removal efficiencies of total chemical oxygen demand CODt and soluble chemical oxygen demand CODs were 89 39±0 00% and 91 89±0 65%, respectively, while color removal reached 75 4±2 28%, and biogas production rate was 6 3±0 3 L/d Increasing salinity to 20 g/L caused a decline in the MLVSS/MLSS ratio to 0 56, with CODt removal dropping to 80 49±0 32% However, under these conditions, CODs removal efficiency remained unaffected 94 0±0 65% and color removal efficiency and biogas production rate increased to 84 92±0 50% and 7 3±0 1 L/d, respectively At the highest salinity of 35 g/L, the MLVSS/MLSS ratio as well as CODt removal efficiency decreased further to 0 50 and 57 44±0 40%, respectively, whereas CODs removal efficiency remained relatively constant 91 51±0 4% Biogas production rate dropped to 5 9±0 1 L/d, but color removal continued to rise, reaching 87 03±1 45% These findings indicate that elevated salinity primarily inhibits methanogenic activity and leads to increased CODt due to cell lysis, while CODs remains largely unaffected Moreover, cell lysis enhances biomass surface exposure, thereby promoting the physical removal of dye even under high salinity stress
کلیدواژهها
نویسندگان
Sina Aghamolaei
Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
Elham Abdollahzadeh Sharghi
Environmental Group, Department of Energy, Materials and Energy Research Center, Karaj, Iran
بابک بنکدارپور
Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
Marziyeh Roodkhaneh
Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
شیوه ارجاع
Aghamolaei, Sina and Abdollahzadeh Sharghi, Elham and Bonakdarpour, Babak and Roodkhaneh, Marziyeh,1404,Salinity Effect on Textile Dyeing Wastewater Treatability in an Up-flow Anaerobic Sludge Blanket Reactor,The Third National Conference on Water Quality Management and the Fifth National Conference on Water Consumption Management with a Waste Reduction and Recycling Approach,Tehran
ارائهشده در
مجموعه مقالات سومین همایش ملی مدیریت کیفیت آب و پنجمین همایش ملی مدیریت مصرف آب با رویکرد کاهش هدررفت و بازیافت11 آذر 1404 · تهران