Institusjon: Norges miljø- og biovitenskapelige universitet (NMBU)

Prosjekttype: phd

Prosjektperiode: 08/2012-08/2017

Prosjektleder/veileder navn: Harsha Ratnaweera; Knut Kvaal;

Master/PhD/PostDoc student navn: Nataliia Sivchenko;

Vladyslav Shostak; Olha Yanova;

Formål / Sammendrag:

The main objectives of the research work were (i) to observe and evaluate particles (flocs) appearing during wastewater coagulation process by image analysis techniques (ii) to develop the floc sensor prototype to improve coagulation dosing control system. Flocs formation process depends on initial wastewater quality, type of coagulant added and its dosage. The relationships between these parameters were established using statistical methods both for laboratory-scale and full-scale data. The digital imaging system based on texture analysis of flocs has been tested in wastewater treatment plant (Drøbak, Norway). The results of these studies showed the potential of the system to be developed into a fully automated online coagulant dosing control system.

Master oppgavene er delfinansiert av Water Harmony Erasmus+ prosjektet (


Sivchenko, N., Kvaal, K., & Ratnaweera, H. (2016). Evaluation of image texture recognition techniques in application to wastewater coagulation. Cogent Engineering, 3(1), 1206679.

Sivchenko, N., Ratnaweera, H., & Kvaal, K. (2016). Approbation of the texture analysis imaging technique in the wastewater treatment plant. In IWA Specialist Conference, Advances in particle science and separation: meeting tomorrow’s challenges. June 22-24, 2016. Oslo, Norway

Sivchenko, N., Kvaal, K., & Ratnaweera, H. (2014). Image analysis of flocs and mathematical modelling applied to coagulation-flocculation process. In IWA Specialist Conference, Advances in particle science and separation: from mm to nm scale and beyond. June 15-18, 2014. Sapporo, Japan.

Sivchenko, N., Kvaal, K., & Ratnaweera, H. (2013). Characterization of flocs in coagulation-flocculation process by image analysis and mathematical modelling. In NORDIWA 13th Nordic Wastewater Conference, October 8-10, 2013. Malmo, Sweden.