Browsing Brage NMBU by Author "Ratnaweera, Harsha"
Now showing items 1-20 of 59
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A novel automatic flow method with direct-injection photometric detector for determination of dissolved reactive phosphorus in wastewater and freshwater samples
Koronkiewicz, Stanislawa; Trifescu, Mihaela; Smoczynski, Lech; Ratnaweera, Harsha; Kalinowski, Slawomir (Journal article; Peer reviewed, 2018) -
Analysing consequences of infiltration and inflow water (I/I-water) using cost-benefit analyses
Sola, Kristin Jenssen; Bjerkholt, Jarle Tommy; Lindholm, Oddvar G.; Ratnaweera, Harsha (Peer reviewed; Journal article, 2020)The Municipality of Asker (Norway) is at risk of not meeting the water quality targets set by the European Union Water Framework Directive within the stipulated timeframe. While there are multiple factors negatively impacting ... -
Approbation of the texture analysis imaging technique in the wastewater treatment plant
Sivchenko, Nataliia; Ratnaweera, Harsha; Kvaal, Knut (Journal article; Peer reviewed, 2017) -
Challenges in Utilizing Water Resources in Lower Reaches of Kanakarayanaru of Northern Sri Lanka for Efficient and Equitable Water Allocation
Ratnaweera, Harsha; Suthakaran, Navaratnam; Ketheesan, B; Subramaniam Sivakumar, Saravanamuttu (Journal article, 2018) -
Comparison of treatment and fouling mitigation efficiency of organic and inorganic coagulants in biofilm membrane bioreactor
Shostak, Vladyslav (Master thesis, 2019)Membrane bioreactors is an exemplary practice of sustainable wastewater treatment. Novel methods and approaches incorporating MBR allow not only treat wastewater with excellent efficiency, but also recover nutrients, recycle ... -
Computational thermodynamic analysis of the interaction between coagulants and monosaccharides as a tool to quantify the fouling potential reduction in the biofilm membrane bioreactor
Kulesha, Olga; Ratnaweera, Harsha (Peer reviewed; Journal article, 2019) -
DeepCSO: Forecasting of Combined Sewer Overflow at a Citywide Level using Multi-task Deep Learning
Ratnaweera, Harsha; Zhang, Duo; Lindholm, Geir (Journal article, 2018) -
Economic Model Predictive Control for optimal struvite recovery
Muralidharan Nair, Abhilash; Haugen, Finn; Ratnaweera, Harsha (Journal article; Peer reviewed, 2020)Resource recovery from municipal wastewater has been a prime focus for a decade. Although several recovery processes already exist in the market today, the high cost of material, inherent disturbance in the influent quality, ... -
Economic Model Predictive Control for optimal struvite recovery
Muralidharan Nair, Abhilash; Haugen, Finn; Ratnaweera, Harsha (Peer reviewed; Journal article, 2020)Resource recovery from municipal wastewater has been a prime focus for a decade. Although several recovery processes already exist in the market today, the high cost of material, inherent disturbance in the influent quality, ... -
Economic Model Predictive Control for optimal struvite recovery
Haugen, Finn Aakre; Ratnaweera, Harsha (Peer reviewed; Journal article, 2020) -
Effects of electrochemical treatment of mixed liquor in submerged ceramic membrane bioreactor
Nehrii, Anastasiia; Kuzhel, Roman (Master thesis, 2019)Our most valuable and irreplaceable resource is water. Humanity withdraws 3.928 km3 of freshwater per year. Approximately 44% is used for agricultural purposes, the other 56% discharged as wastewater (WW). A large amount ... -
Electrocoagulation in wastewater treatment : a review
Granhus, Thea Caroline (Master thesis, 2020)Vann er vår mest verdifulle ressurs og essensielt for mennesker. Fortsatt har en stor del av verdens befolkning ikke tilgang til trygt vann og sanitærtjenester. Mer enn 80 \% av det genererte avløpsvannet blir i dag ikke ... -
Enhancement of coagulant dosing control in water and wastewater treatment processes
Liu, Wei (PhD Thesis;2016:62, Doctoral thesis, 2016)Chemical coagulation is one of the most important treatment processes in wastewater treatment and drinking water treatment. Defining the optimal coagulant dosage is a vital operation that decides the treatment efficiency ... -
Enhancing Operation of a Sewage Pumping Station for Inter Catchment Wastewater Transfer by Using Deep Learning and Hydraulic Model
Ratnaweera, Harsha; Zhang, Duo; Skullestad Hølland, Erland; Lindholm, Geir (Journal article, 2018) -
Evaluation of image texture recognition techniques in application to wastewater coagulation
Sivchenko, Nataliia; Kvaal, Knut; Ratnaweera, Harsha (Journal article; Peer reviewed, 2016) -
Explicit and interpretable nonlinear soft sensor models for influent surveillance at a full-scale wastewater treatment plant
Wang, Xiaodong; Kvaal, Knut; Ratnaweera, Harsha (Peer reviewed; Journal article, 2019)In wastewater treatment plants, the most adopted sensors are those with the properties of low cost and fast response. Soft sensors are alternative solutions to the hardware sensor for online monitoring of hard-tomeasure ... -
Exploiting Capacity of Sewer System Using Unsupervised Learning Algorithms Combined with Dimensionality Reduction
Ratnaweera, Harsha; Zhang, Duo; Lindholm, Geir; Martinez Almario, Nicolas (Journal article, 2018) -
Fjerning av NOM ved bruk av adsorpsjon og membranfiltrering
Johnsen, Ingrid Marie (Master thesis, 2016-08-17)En av de største utfordringene for drikkevann i Skandinaviske land er økt mengde organisk stoff, som for eksempel humus. Humus kan føre til driftsproblemer i renseanlegg, som blant annet tilskitning. Flere anlegg i Norge ... -
Floc sensor prototype tested in the municipal wastewater treatment plant
Sivchenko, Nataliia; Kvaal, Knut; Ratnaweera, Harsha (Journal article; Peer reviewed, 2018) -
Flux enhancers in biofilm membrane bioreactors : insight into fouling control
Kulesha, Olga (PhD Thesis;2019:83, Doctoral thesis, 2019)Conventional wastewater treatment technologies are not able to keep up with the population growth and new challenges and restrictions, induced by climate change. Membrane bioreactor (MBR) technology has a high potential ...