Department Seminar on Integrating Systems of Water Reuse and Desalination

DTU Environment's visiting Fulbright Scholar Profesor Amy Childress will give a talk on Integrating Systems of Water Reuse and Desalination on October 11th 2019 at 13:00.
The seminar will be in B113/R011

A modeling framework was developed to evaluate synergistic blending of the waste streams from seawater reverse osmosis (RO) desalination and wastewater treatment facilities that are co-located or in close proximity.

Four scenarios were considered, two of which involved blending treated wastewater with the brine resulting from the seawater RO desalination process, effectively diluting RO brine prior to discharge. One of these scenarios considers the capture of salinity-gradient energy. The other two scenarios involved blending treated wastewater with the intake seawater to dilute the influent to the RO process. One of these scenarios incorporates a low-energy osmotic dilution process to provide high-quality pre-treatment for the wastewater.

The modeling framework evaluates required seawater and treated wastewater flowrates, discharge flowrates and components, boron removal, and system energy requirements. Using data from operating facilities, results showed that the two influent blending scenarios (Scenarios 3 and 4) had several advantages over the RO brine blending scenarios (Scenarios 1 and 2), including: 1) reduced seawater intake and brine discharge flowrates, 2) no need for second-pass RO targeting boron control, and 3) reduced energy consumption.

It should be noted that the framework was developed for use with co-located seawater desalination and coastal wastewater reclamation facilities but could be extended for use with desalination and wastewater reclamation facilities in in-land locations where disposal of RO concentrate is a serious concern.


Fri 11 Oct 19
13:00 - 14:00


DTU Environment
Bygningstorvet, Bygning 113
Room 011
2800 Kgs. Lyngby