A pilot-scale osmotic membrane bioreactor (OMBR) was developed with a forward osmosis (FO) membrane submerged in a bioreactor and a Membrane Distillation re-concentration step driven by waste heat for potable wastewater reuse applications at military forward operating bases. Biofilm thickness, which is influenced by the forward osmosis (FO) membrane configuration, is a key parameter of reverse salt transport and elevated bioreactor salinity inhibits carbon and nutrient removal. Reverse salt flux (RSF) from two bench-scale forward osmosis membrane configurations were evaluated; the first is a membrane cassette submerged in the bioreactor and the second is a sidestream process external to the bioreactor. The water flux and RSF of the bench-scale systems were used to model pilot-scale bioreactor salinity and the effects of changing the solids retention, reactor volume, and draw solution concentration were examined.
This presentation is available to AMTA Members only.
- Christopher P. Morrow, PhD / Sage Hiibel / Amy Childress
- University of Southern California / University of Nevada, Reno
- AMTA/AWWA Membrane Technology Conference, Long Beach, CA
- AMTA/AWWA Membrane Technology Conference
- Membrane, Forward Osmosis, MBR, Fouling, Reuse, Osmotic MBR