利用真空式蒸餾薄膜回收染料合成工藝中的氨

本实验旨在研究真空膜蒸馏在染料废水中回收NH3的实施方法。研究了操作参数对从合成废水中回收氨的主要影响。主要参数实验结果表明，较高的进料pH（13），较高的进料温度（50°C），较高的初始进料浓度（6000 ppm）和较低的真空压力（-40 kPa）可提高氨的去除和回收效率。发现pH是使用真空膜蒸馏回收氨的主要驱动参数。最佳参数实验和其他最佳参数实验一致认为，高pH和较低的真空压力可为使用VMD回收氨提供最佳结果。最佳参数实验结果表明，pH 13，温度70°C和真空压力-40 kPa在使用VMD回收氨方面提供了最佳结果。同时，额外的最佳参数实验结果表明，pH 13，温度30°C和真空压力-40 kPa可使使用VMD回收氨的最佳结果。使用最佳参数去除染料废水并回收氨，在第6小时实验中氨去除率为58％，回收率为25％。但是，在实验的第19小时内，使用附加的最佳参数去除和回收氨的氨去除率为70.49％，回收率为31％。氨气的成本效益试验工厂每月可给公司带来约141,779,687新台币的费用

關鍵字

氨；去除；回收；膜蒸? ； DOE，VMD

並列摘要

This experiment aims to investigate the implementation of vacuum membrane distillation for NH3 recovery from dyestuff wastewater. The main effects of operating parameters on ammonia recovery from synthetic wastewater have been investigated. Main parameter experimental results showed that high feed pH (13), high feed temperatures (50°C) , high initial feed concentrations (6000 ppm) and lower vacuum pressure (-40 kPa ) enhance ammonia removal and recovery efficiency. The pH is found out to be the main driven parameters for ammonia recovery using vacuum membrane distillation. Optimum parameter experiment and additional optimum parameter experiment agreed high pH and lower vacuum pressure give the best result for recovery ammonia using VMD. Optimum parameter experiment resulted pH 13, Temperature 70 °C and Vacuum Pressure -40 kPa give optimum result in ammonia recovery using VMD. Meanwhile, additional optimum parameter experiment resulted pH 13, Temperature 30°C and Vacuum Pressure -40 kPa give optimum result in ammonia recovery using VMD. The dyestuff wastewater removal and recovery ammonia using optimum parameter resulted ammonia removal percentage was 58% with recovery percentage 25% within 6th Hours experiment. However, removal and recovery ammonia using additional optimum parameter resulted ammonia removal percentage was 70.49% with recovery percentage 31% within 19th hours experiment. Cost benefit pilot plant for ammonia recovery can give company around 141,779,687 NTD each month