Spiral wound filtration assembly including integral bioreactor

Patent metadata

Field	Value
Publication number	US-10358366-B2
Application number	US-201715630204-A
Country	US
Kind code	B2
Filing date	Jun 22, 2017
Priority date	Sep 24, 2014
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A spiral wound filtration assembly including:
i) a pressure vessel comprising a feed port, concentrate port and permeate port; ii) at least one spiral wound membrane module comprising at least one membrane envelop wound around a permeate tube which forms a permeate pathway to the permeate port; and iii) a bioreactor having a cylindrical outer periphery extending along an axis (Y) from a first end to a second end, an inlet located near the first end, and an outlet located near the second end;

wherein the spiral wound membrane module and bioreactor are serially arranged within the pressure vessel.

First claim

The invention claimed is:

1. A spiral wound filtration assembly comprising:
i) a pressure vessel comprising a feed port, concentrate port and permeate port;
ii) at least one spiral wound membrane module comprising at least one membrane envelop wound around a permeate tube which forms a permeate pathway to the permeate port; and
iii) a bioreactor having a cylindrical outer periphery extending along an axis (Y) from a first end to a second end, an inlet located near the first end, and an outlet located near the second end;
wherein the bioreactor has a spiral wound configuration comprising a flat sheet having two opposing bio-growth surfaces and a feed spacer spirally wound about the axis (Y);
wherein the feed spacer defines flow channels extending along both of the two opposing bio-growth surfaces of the flat sheet from the inlet to the outlet of the bioreactor; and
wherein the spiral wound membrane module and bioreactor are serially arranged within the pressure vessel.

2. The assembly of claim 1 wherein the flat sheet is permeable and the two opposing bio-growth surfaces are in fluid communication with each other.

3. The assembly of claim 1 wherein the flat sheet and feed spacer are spirally wound about a hollow conduit, wherein the conduit is sealed from fluid communication with the flat sheet and feed spacer and is serially connected to the permeate tube of the spiral wound membrane module.

4. The assembly of claim 1 further comprising a plurality of spiral wound membrane modules, each comprising at least one membrane envelop wound around a permeate tube, and wherein the spiral wound membrane modules are serially arranged within the pressure vessel with a first element of the series positioned nearest to a first end of the pressure vessel and a last element of the series positioned adjacent to an opposing second end of the pressure vessel, and wherein the permeate tubes of the spiral wound elements are serially connected to form a permeate pathway which is connected to the permeate outlet, and
wherein the bioreactor is arranged within said series at a location upstream of at least one spiral wound membrane module.

5. The assembly of claim 4 wherein the bioreactor is arranged within the series at a location upstream of all spiral wound membrane modules.

6. The assembly of claim 1 wherein the feed spacer of the bioreactor provides flow channels of from 0.10 mm to 1.5 mm between adjacent bio-growth surfaces of the flat sheet.

7. The assembly of claim 1 wherein the flow channels have a void volume between bio-growth surfaces that is not occupied by a solid, and wherein the void volume of the flow channels is at least 65% of the volume of the bioreactor.

Assignees

• Dow Global Technologies Llc

Inventors

• Jons Steven D
• Johnson Jon E

Classifications

• B01D2311/2688

  Biological processes · CPC title

• C02F3/1268

  Membrane bioreactor systems · CPC title

• B01D63/12

  comprising multiple spiral-wound assemblies · CPC title

• B01D61/04

  Feed pretreatment · CPC title

• C02F3/109 Primary

  Characterized by the shape (C02F3/104 takes precedence) · CPC title