摘要 |
<p>A filtration process and apparatus (10) are provided wherein feed fluid to be filtered is introduced into a small gap (30) between two rectangular plates (12, 14). At least one of the plates supports a porous filtration membrane (24) within the gap. During filtration, at least one of the plates (12, 14) is oscillated to effect a continuously changing gradient of gap (30) width between opposing surfaces of the plate. A permeate is collected and a seal (36) is provided to prevent admixture of the permeate with either feed fluid or retentate.</p> |