Water desalination with nanotechnology
The aim of the NAWADES project is to research, design, manufacture and test a new concept for seawater desalination using membranes. Four developments are pursued in this concept:
- The ultra-membrane filtration typically upstream of an osmosis membrane stage is compactly integrated directly into a multilayer membrane filter.
- The formation of deposits (scaling and fouling) is reduced by surface treatment of the membranes with plasma technology.
- Titanium dioxide nanofibers are integrated into the membrane to prevent fouling by microbial growth in combination with the introduction of UV light via a glass fabric in the space between the membrane units.
- To monitor the condition of the membranes, a coating is applied on both sides, which acts capacitively and is evaluated.
The new technology is intended to enable self-cleaning, low-maintenance membrane filtration, which can be used in seawater desalination with high efficiency and service life as well as reduced energy requirements (as a result of pressure reduction through reduced fouling).