• Nano-Enabled Water Technologies

Invited SpeakersProfile Details

Professor Cees Buisman
Professor Cees Buisman ​Dr. Cees J.N. Buisman serves as an Executive Board Member at Wetsus, European centre of excellence for sustainable water technology. He is also a full Professor at the sub-department of Environmental Technology at Wageningen University in the field of biological reuse and recovery technology since 2003. His current research interest in on bio-electrochemistry, novel methods of fermentation, and biological induced solid production, both for recovery of energy, chemicals and minerals.

Biography

Dr. Cees J.N. Buisman serves as an Executive Board Member at Wetsus, European centre of excellence for sustainable water technology. He is also a full Professor at the sub-department of Environmental Technology at Wageningen University in the field of biological reuse and recovery technology since 2003. His current research interest in on bio-electrochemistry, novel methods of fermentation, and biological induced solid production, both for recovery of energy, chemicals and minerals. 

Before joining the university, he held the position of Director Technology and Business Development of Paques BV from 1990 until 2003 where he was responsible for the introduction of several newly developed environmental technologies into the market.

Dr. Buisman is member of The Netherlands Academy of Technology and Innovation and serves on several Advisory Boards and Supervisory Boards. He obtained his M.Sc. and Ph.D. degree from Wageningen University & Research. 

All sessions by Professor Cees Buisman

  • Day 2Tuesday, January 29th
2:00 pm

(Bio)electrochemical ammonium recovery from waste streams

Conventional processes for ammonium removal are biological processes, like (de)nitrification and Annamox®. In both cases the ammonium is converted to nitrogen gas and all potential energy is lost. On top of that about 1-2% of ammonium will be discharged as N2O which is an unwanted strong greenhouse gas. Alternative treatment methods try to recover the ammonium as concentrated streams that can be reused, recovering the energy potential and preventing N2O emissions. But these alternative methods, like stripping, use a lot of energy.
We develop a new (bio)electrochemical way to concentrate the ammonium. The waste stream will enter the anode chamber, which is separated by a cation exchange membrane from the cathode chamber. Ammonium as positive ion will be transported to the cathode where it will be recovered by a hydrophobic membrane. Other cations like potassium and sodium will reach equilibrium between anode and cathode chambers. The energy input can be reduced in two ways. One uses bacteria that grow on the anode, that can produce a current based on the oxidation of organic compounds in the waste stream. One can recycle the produced H2 from the cathode to the anode. With this technology, we can recover ammonium at very low energy input. We will present the state of the art of this development.

Auditorium between bldg. 4 & 5, level 0 14:00 - 14:30 Details