文献类型：期刊文献

英文题名：Centrifugation forced ice-concentrate separation to enhance suspension freezing desalination performance

作者：Wei, Jingyu[1];Chen, Peng[1,4];Pan, Yalin[1];Fang, Zhengnan[1];Fu, Tao[1];Zhang, Jingxian[1];Meng, Guangyuan[1];Zhu, Jun[3];Zhang, Lehua[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[3]Shanghai Ind Investment Grp Co Ltd, Shanghai 200233, Peoples R China;[4]130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：566

外文期刊名：DESALINATION

收录：;EI(收录号：20233414584119);WOS:【SCI-EXPANDED(收录号:WOS:001066825000001)】；

基金：This work was supported by the National Key Research and Development Program of China (Developing Highly Efficient Means of Water Utilization, 2019YFC0408202), the National Natural Science Foundation of China (NSFC) (21876050).

语种：英文

外文关键词：Suspension freezing; Ice purification; Centrifugation; Desalination

摘要：Suspension freeze desalination is a promising route for treatment of high salinity wastewater, but the poor iceconcentrate separation often generates decrease of desalination efficiency. In this work, it is demonstrated that centrifugation forced dewatering can assist in ice purification and enhance suspension freeze desalination performance. The positive correlation and good linear fitting relationship between ice purity and dewatering rate were identified at various centrifugation speeds, centrifugation time, and ice layer thickness. Changes of ice shape were recorded by low-temperature optical microscope observation system. The free water removal and ice floc destruction induced by centrifugal field have an important contribution to ice purification. Increasing centrifugation speed from 100 r/min to 500 r/min, the corresponding relative centrifugal force increased 27-fold, creating sharp increases in ice purity (rate constant k = 0.1605) and dewatering rate (rate constant D = 0.0563). Due to the strong binding characteristics and small portion of bound water, ice desalination efficiency per unit centrifugal force dropped when centrifugation speed increased from 1000 r/min to 3000 r/min. Besides, the multi-step dewatering and purification mechanism involved in ice centrifugation was depicted. The suspension freeze technology hybrid with centrifugation not only enhances desalination efficiency but also is beneficial to obtain high-purity ice.