Both municipal and industrial wastewater treatment facilities benefit from membrane bioreactor (MBR) technology by treating wastewater streams from beverage, livestock, dairy, food, residential and industrial sources.

These applications include retrofits of existing facilities as well as installation of new plants, known as greenfield applications, for both discharge and wastewater reuse. Wastewater reuse for applications such as irrigation, cooling tower make-up and other non-potable uses can help conserve precious drinking water resources.

Customers benefit from our exclusive partnership with Mitsubishi, a leading producer of microfiltration membranes, a pioneer in the field. CWT' MBR combines the technologies of activated sludge treatment with Mitsubishi microfiltration membranes. CWT' systems are known for their time-tested reliability, low maintenance costs and simple, effective designs.

How MBR Works
The 0.4 μm microfilters are submerged and placed into an aeration basin. A vacuum is applied downstream of the membranes to allow for the solid/liquid separation process to occur. The membranes eliminate the need for a secondary clarifier because they act as an absolute barrier. Air is introduced into the system to scour the membranes and drive the biological treatment.

Typical effluent values based on domestic wastewater are:

Biological oxygen demand - BOD55 mg/L
Colony forming units - CFU10 mg/L
Total suspended solids - TSS5 mg/L
CWT' MBR System:

Generates less sludge than conventional wastewater treatment systems
Meets California Title-22 Certification for Wastewater Reuse
When added to an existing sludge system, throughput is increases by three to four times.
Creates membrane effluent with an ideal Silt Density Index (SDI) for Reverse Osmosis feed
Eliminates backwash step resulting in a simple system
Reduces O&M costs.

Over 1200 Mitsubishi Rayon MBR systems have been installed in the world since 1992. Applications range from conventional wastewater to food / beverage and industrial applications and up to 16,000 ppm BOD livestock wastewater.