Mining from the sewer in Rotterdam

Wastewater Treatment, Nutrient Factory, Innovation / new techniques

The aim of this project is to develop an innovative concept for the recovery of water, energy and nutrients from domestic wastewater. The core of this concept is ceramic nanofiltration. Ceramic nanofiltration membranes are made of titanium oxide and are hydrophilic. Due to these characteristics, water flows easily through the nano pores of the membrane and the pore will not clog easily. This is an advantage over conventional polymeric membranes, which are commonly used for water treatment. The clean water steam is potentially a suitable pre-treatment for reverse osmosis, used for production of demineralised water for industries.
In the pilot hall, the efficiency of ceramic nanofiltration was tested using pre-filtered domestic wastewater. The pre-filtration existed of a grit and fine sieves, including a drum- and belt sieve.

- Franca Kramer
- Ran Shang
- Bas Heijman


During the research in the pilot hall, it was proven that ceramic nanofiltration fed with pre-filtered domestic wastewater can run for 5 days without cleaning of the membranes. After these 5 days, the membranes were efficiently recovered with chemical cleaning consisted of treatment with hypochlorite and acid. Moreover, ceramic nanofiltration was shown to potentially be a suitable pre-treatment for ceramic nanofiltration. This was investigated using the membrane fouling simulator (MFS). See attached paper for more detailed information.

Start of Research
June 2014

End of Research
June 2015


- TU Delft
- Evides Industriewater
- Hoogheemraadschap Delfland
- Waterschap Hollandse Delta
- Logisticon Water Treatment





Franca Kramer