Voortgang onderzoek van student Han Cao

Han Cao werkt op het wetland gedeelte, dat stuk zuivering ligt voor de ontzilting van Evides.

My objective for this research is to find the best operational settings for the denitrification process such as dissolved oxygen (DO) concentration, carbon source concentration, and hydraulic retention time (HRT) in the constructed wetland. The wetland is divide into three zones, and we can control the DO concentration for each zone, currently, we need nitrification first that nitrify ammonium to nitrate, this has to under aerobic condition. Then we have denitrification process, the nitrogen will be removed from the water. So we set the first zone as an aerobic zone, the DO concentration is around 2.5 mg/L. The second zone will be an anaerobic zone for denitrification, there is a carbon dosing system at the beginning of this zone to provide a carbon source for denitrification, by setting different carbon dosing concentration to find the best carbon and nitrogen (C:N) ratio. The last zone will be an aerobic zone again in order to biodegrade the organic carbon. Besides, on the site, I daily check the wetland situation, monitor the influent and effluent parameter. I also take grab samples to double-check with the online sensors.

Wetland configuration:

Wetland construction finished:

Wetland influent system:

TKI Delta technologie HZU01 Wetlands als voorzuivering voor milde ontzilting