memDENSE* Membrane Bioreactor

Unlock MBR potential: Tailor mixed liquor through selective wasting & densification

Membrane Bioreactors (MBR) are normally operated with uncontrolled MLSS (Mixed liquor suspended solids) characteristics which limits the full potential of MBR performance. memDENSE MBR combines densification with ZeeWeed* MBR to optimize membrane and biological performance.

Download the memDENSE MBR Customer Benefits

Overview
How it Works
Case Studies
Resources

Overview

memDENSE MBR reduces operating cost by tailoring mixed liquor characteristics to optimize membrane & biological performance.

memDENSE MBR benefits include:

Membrane Performance

Reduced colloidal fouling
Reduced membrane cleaning
Improved sludge filterability
Increased permeability
Optimized performance over the life of the membranes

Biological Performance

Increased resilience
Biological phosphorus removal optimization
Nuisance foam elimination

memDENSE MBR can be used for a range of applications:

Municipal - optimizing membrane & biological nutrient removal performance
Industrial - improved biological resilience and membrane performance
Upgrade of existing MBR plants - retrofit into existing MBR plant operation

How it Works

memDENSE MBR uses a hydrocyclone to separate activated sludge into a dense and light fraction. The dense fraction is returned to the biological process and the light fraction is discharged to solids treatment. The result is selective wasting of bacterial populations that negatively impact MBR performance and retention of densified biomass fractions that improve biological and membrane performance.

Case Studies

memDENSE MBR Paves the Way for Efficient Biological and Membrane Performance at the City of Detroit Lakes: Download Full Case Study

The City of Detroit Lakes faced multiple wastewater treatment challenges, including fluctuating influent quality, varying industrial loads, and seasonal temperature changes affecting flow rates. The City implemented memDENSE MBR to address the challenges and meet strict phosphorus discharge limits. The system selectively removes problematic bacteria while retaining beneficial biomass, ensuring consistent performance despite seasonal changes and industrial load fluctuations.