ZeeWeed 1000 Ultrafiltration Membrane

ZeeWeed 1000 for drinking water and tertiary treatment of wastewater

Overview & Benefits

Introduction to the specific product in the product family

• Compact: bookshelf style arrangement of membrane modules up to 4 high, making the ZeeWeed 1000 membrane flow to footprint ratio best in class.

• Gentle: immersed membranes operate on a vacuum, reducing energy and chemical costs over alternative filtration options.

• Fit for Purpose: specialized products for lower solids drinking water applications, and for high solids applications like tertiary wastewater treatment
• World quality tools:

Case Studies

ZeeWeed 1000 retrofits a gravity media filter in Draper Utah

ZeeWeed 1000 membranes provides tertiary treatment of wastewater for reuse in Benidorm Spain

ZeeWeed 1000 membranes to increase capacity to 200 MGD (800 MLD) in Mississauga Canada Water Treatment Plant

ZeeWeed 1000 treats wastewater for reuse in Beijing China

Supporting Material

ZeeWeed 1000 for Drinking Water - Fact Sheet

ZeeWeed Membranes for Drinking Water - Brochure

ZeeWeed 1000 Stainless Steel Cassette - Fact Sheet

ZeeWeed Membranes for Tertiary Wastewater Reuse - Brochure

Next Generation Cassette (NGC)

Overview & Benefits

The Next Generation Cassette is the latest advancement in immersed Ultrafiltration membranes.   It uses an FRP skeleton to create a flexible cassette design, which offers numerous advantages:

• Compact footprint: the 4 high membrane cassette is an improvement in footprint over the already impressive stainless steel cassette.  The result is less and smaller membrane tanks.

• Simplicity: the modular building blocks allow you to chain multiple cassettes together, resulting in fewer tank connections, and the chance to work with longer tanks.
• Separated aeration grid: This reduces the height of the NGC cassette, and permits the cassettes to rest on the tank floor, as opposed to being suspended in the tank.
• Energy savings: Use 25% less energy for aeration with the taller cassette.

Supporting Material

• Next Generation Cassette for ZeeWeed 1000 - Fact Sheet

How It Works 

The ZeeWeed 1000 is an immersed Ultrafiltration hollow fiber membrane.  The membranes are installed in a cassette, very much resembling books in a book case.  The membrane cassettes are installed in a tank. 

Feed water enters the membrane tank and surrounds the thousands of membrane fibres contained within.  A vacuum is drawn on the inside of the membrane to suck the feed water to the inside of the membrane through many microscopic pores, resulting in a clean filtered water.  The suction can be created by a pump, or simply by siphon alone.  Particulates and bacteria are too large to pass and so remain in the membrane tank outside of the membrane fibers.

Periodically, water filtration is stopped for cleaning, and the flow of water is reversed. Clean water is pushed from the inside of the membrane fibres and flows to the outside.  This pushes off all the material that has accumulated on the outside surface of the membrane and flushes it to waste. At the same time, air is applied to the bottom of the module to scour the membrane surface and aid in the cleaning process.   The tank is drained of all backwash waste, then refilled with fresh water, and filtration begins again. 

These cycles of filtration and backwash happen automatically so that operation is simple and membranes operate in top form.