Assessment of combination of pressure-relief pulsation flow and diatomite filter-aid in membrane fouling control

作者：Ma, Zhong; Lu, Xiaolong^*; Wu, Chunrui^*; Liu, Chong; Liu, Zhiyu; Zhang, Hao

来源：Journal of the Taiwan Institute of Chemical Engineers, 2017, 80: 464-471.

DOI：10.1016/j.jtice.2017.07.040

• Membrane fouling
• Pressure-relief pulsation flow
• Diatomite
• Filtration resistance analysis

Alleviation of membrane fouling in a convenient process design of pressure-relief pulsation flow coupled with diatomite filter-aid has been researched both theoretically and experimentally. On the one hand, the cake-layer of diatomite particles serves as a dynamic membrane, which acts as a deep-bed filter and catches some small particles before they contact to the membrane surface. On the other hand, the diatomite particles in cake layer may return to the feed solution under the condition of high shearing force produced by pulse flow. The membrane flux in the four processes (non-pulsation, with pulsation, with diatomite, and with pulsation +diatomite) was studied, and the filtration resistance during the processes was also evaluated. The results showed that the flux increased by 33.3% and the cake layer resistance decreased by 24.5% in the coupled process, though the average operating pressure was 22.5% lower than conventional non-pulsation process. Therefore, the coupling process is expected to be a practical and realizable technology applying in membrane separation process.

• 出版日期2017-11
• 单位天津工业大学