公开(公告)号：US20200238218A1

公开(公告)日：2020-07-30

申请号：US16637035

申请日：2018-08-10

Applicant: OVIVO INC.

Inventor： Clay Brandon RICH ,  Rick WHISENANT ,  Clyde Wayne HOLLIMAN ,  Dennis LIVINGSTON

IPC: B01D65/08 ,  C02F11/121 ,  C02F3/20 ,  C02F3/12 ,  B01D61/20 ,  B01D71/02 ,  B01D69/08 ,  B01D69/06

Abstract: A submerged membrane unit has air diffusers located outside of the membrane area in plan view. The diffusers may be mounted in or below a diffuser case. The diffuser case may have walls to direct bubbles towards the membranes. The diffusers may be drop diffusers, for example as in a single drop diffuser assembly. The membrane unit may have polymeric or ceramic membranes, for example ceramic flat plate membranes. In an example, a rectangular shrouded membrane unit has a diffuser case below it that is rectangular in plan view but trapezoidal in side view, with drop diffusers located in the corners of the diffuser case. In a process of treating high strength wastewater, for example thickening or digesting waste sludge, a membrane unit optionally with ceramic plate membranes is immersed in the wastewater. The membranes are sparged with bubbles produced below but beside the membrane unit in a diffuser case.