Using a high shear rotary membrane system to treat shipboard wastewaters: Experimental disc diameter, rotation and flux relationships

被引:9
作者
Bendick, John [1 ]
Reed, Brian [1 ]
Morrow, Patrick [2 ]
Carole, Tracy [2 ]
机构
[1] Univ Maryland Baltimore Cty, Dept Chem Biochem & Environm Engn, Baltimore, MD 21250 USA
[2] Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD 20817 USA
关键词
Rotating membrane; Shear rate; Rotation; Diameter; ULTRAFILTRATION; PERFORMANCE; FILTER; FLOW;
D O I
10.1016/j.memsci.2014.02.015
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The permeate flux (J) and volume throughput (Q) dependence on rotation (omega), diameter (D), Reynolds Number (Re) and shear rate (gamma) for a high shear rotary membrane system (HSR-MS) was investigated to determine if larger, slower rotated discs could lead to a smaller system weight and foot/cube-print which is needed for US Navy shipboard placement. The HSR-MS steady state flux (J(ss)) was highly dependent on omega and D ranging from 10 to 433 L/m(2) hr (LMH). For every 100 rpm increase in omega, J(ss) increased on average by 26 LMH. The outer membrane third provided >= 50% of the total flow, with the inner third providing about 15%. The J(ss)-gamma relationship was extended to larger membranes (312 and 374 mm) and predicted that J(ss) increased by about 15% for each increase in size. Q(ss) was much more sensitive to increases in diameter and corresponding surface area - Q increased by 45% for D=267 mm -> 312 mm and 65% increased for D=312 mm -> 374 mm (approximate to 1% increase in Q per mm increase in diameter). Collectively, the results show that larger discs, rotated at lower rotations, can produce similar or greater Q compared to smaller discs rotating faster (C) 2014 Published by Elsevier B.V.
引用
收藏
页码:178 / 184
页数:7
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