结垢
膜蒸馏
焊剂(冶金)
膜污染
响应面法
体积流量
环境工程
沉积(地质)
入口
材料科学
机械
膜
化学
环境科学
色谱法
海水淡化
机械工程
工程类
冶金
地质学
古生物学
物理
生物化学
沉积物
作者
Francesco Ricceri,Bastiaan Blankert,Noreddine Ghaffour,Johannes S. Vrouwenvelder,Alberto Tiraferri,Luca Fortunato
出处
期刊:Desalination
[Elsevier]
日期:2022-10-01
卷期号:540: 115971-115971
被引量:15
标识
DOI:10.1016/j.desal.2022.115971
摘要
Understanding the role of operating condition on fouling development in membrane distillation (MD) is critical for the further optimization of MD technology. In this study, organic fouling development in MD was investigated varying the feed inlet temperature from 35 to 65 °C and the cross-flow velocity from 0.21 to 0.42 m/s. The fouling layer thickness was estimated at the end of each experiment non-invasively with optical coherence tomography. The set of experiments was mined to model the initial flux decline, the near-stable flux, and the final foulant thickness responses by central composite design, a useful response surface methodology (RSM) tool. The results indicated a linear increment of the fouling thickness by increasing the feed inlet temperatures. Overall, the feed inlet temperature governed both the initial flux decline and the fouling deposition. The benefits in water productivity obtained by increasing the feed temperature were always offset by higher fouling deposition. Higher cross-flow velocities showed a positive effect on the initial flux, which however translated in larger values of the initial flux decline rate. On the other hand, the higher shear stress contributed to a decrease of the final steady-state fouling layer thickness. The proposed approach was proven to be a valuable tool to assess the role of the operating conditions on fouling and process performance in MD.
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