M. Sc. Nurul F. Himma

Dr.-Ing. Florencia Saravia

Problem:                

Membrane distillation (MD) has emerged as an attractive separation technology because of its high recovery and less fouling compared to reverse osmosis, and low temperature and simple up-scaling compared to conventional distillation. In addition to well-known seawater desalination, MD is highly potential to be applied for pure water production from biologically treated wastewater, addressing environmental concerns and water sustainability. However, wetting and fouling are still the main issue in MD process, and it could be exacerbated by the complex composition of wastewater. Meanwhile, there are many unfilled spots in the scope of monitoring and quantification of wetting and fouling, leaving a lack of understanding.

Tasks:                    

The aim of this work is to investigate wetting and fouling in air gap membrane distillation and to evaluate its performance in pure water production from biologically treated wastewater. Optical coherence tomography is used to in-situ monitor the wetting and fouling, along with the evaluation of rejection. Different feed solutions and hydrophobic membranes are tested. Wettability measurements including liquid entry pressure and contact angle, as well as contaminant analysis are carried out.  

The scope of the assignment can be adapted to a study project or Bachelor's thesis, and it is possible to continue for a Master's thesis.