Saudi Aramco has exited wastewater treatment system developer OxyMem, which has been bought by another corporate investor, DuPont.

Chemicals producer DuPont has acquired Ireland-based wastewater filtration technology developer and portfolio company OxyMem for an undisclosed amount.

Spun out of University College Dublin in 2013, OxyMem has developed an energy-efficient system that uses hollow fibre gas permeable membranes to transfer oxygen to microorganisms in order to treat wastewater.

DuPont already owned 31% of the company, the stake taken through a deal that gave it the option to acquire full ownership. Its investors also include Saudi Aramco Energy Ventures, oil…

Robert Lavine

Robert Lavine is special features editor for Global Venturing.