Blar i Norges miljø- og biovitenskapelige universitet på forfatter "Ratnaweera, Harsha"
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Operational optimization of Biofilm Membrane BioReactor (BMBR) for decentralized wastewater treatment
Arembage, Anura Kumara (Master thesis, 2018)Biofilm Membrane BioReactor (BMBR) is a promising technological combination of moving bed biofilm reactor (MBBR) with membrane bioreactor (MBR) for municipal and industrial wastewater treatment. It has resulted in prominent ... -
Optimalisering av fellingsprosessen ved hjelp av vannkvalitetsparamtere, sanntidsmåling og fnokkstruktur
Torskenæs, Therese (Master thesis, 2020)Helt siden de første renseanleggene ble bygget i Norge på 70-tallet har det vært sverget til kjemisk felling, og det er fremdeles den foretrukne metoden for rensing av avløpsvann. Årsaken er den gode effekten det har på ... -
Optimalisering av fellingsprosessen ved Solumstrand renseanlegg : muligheter og utfordringer
Seip, Harald Darre (Master thesis, 2017)De fleste nordmenn er tilknyttet et kjemisk eller kjemisk-biologisk avløpsrenseanlegg, og de fleste fellingsprosessene bruker mengdeproporsjonal dosering av koagulanter. Dette har imidlertid medført unødvendig kjemikaliebruk ... -
Optimisation of the coagulation process to improve plant availability of phosphorus in wastewater sludge
Manamperuma, Lelum Duminda (PhD Thesis;2016:61, Doctoral thesis, 2016)Coagulation is used for the removal of colloids, particles and phosphates in wastewater treatment. The efficiency and economics of chemical coagulation, one of the most robust wastewater treatment processes, is critically ... -
Optimisation of wastewater treatment systems with data mining and process modelling
Wang, Xiaodong (PhD Thesis;2018:43, Doctoral thesis, 2018)Wastewater treatment facilities serve an important purpose in public sanitation. Wastewater treatment plants (WWTP) are built at the end of sewerage systems to purify the wastewater before it enters natural water bodies. ... -
Optimizing the coagulation process at Solumstrand wastewater treatment plant
Karlsen, Snorre Katrud (Master thesis, 2020)Renseanlegg i Norge har lenge benyttet seg av jartesting og mengdeproporsjonal dosering for å bestemme doseringen ved den kjemiske fellingsprosessen. Disse metodene har blitt benyttet ettersom hovedmålet til renseanleggene ... -
Phosphorus from sludge : evaluation of organic polymer substitution of metal coagulants on phosphorus availability for plant uptake
Cariño, Hannah Katrina (Master thesis, 2016-08-11)Majority of Norwegian wastewater treatment plants utilize chemical treatments such as coagulation to meet high removal standards for phosphorus in wastewater. Up to 85% of the total sludge produced from these plants are ... -
Prediction of THMs formation potential in disinfection of drinking water
Koltsova, Evelina (Master thesis, 2019)Many people are exposed to disinfection by-products through centralized drinking water supplies around the world. There is a big concern about the possible relation between DBPs formation and cancer cases. THMs and HAAs ... -
Real-time monitoring of enhanced biological phosphorus removal in a multistage EBPR-MBBR using a soft-sensor for phosphates.
Muralidharan Nair, Abhilash; Gonzalez Silva, Blanca Magdalena; Haugen, Finn; Ratnaweera, Harsha; Østerhus, Stein Wold (Peer reviewed; Journal article, 2020) -
A review of selected natural coagulants in water and wastewater treatment
Aarø, Sebastian Slinning (Master thesis, 2020)Water treatment by inorganic coagulants and synthetic polymers poses environmental challenges tied to trace metals and sludge quality/quantity. With the popularisation of chemical precipitation during the last 50 years, ... -
Sewer Overflow Control using Different Modeling Techniques and Internet of Things
Zhang, Duo (PhD Thesis;2019:55, Doctoral thesis, 2019)Increased urbanization and extreme rainfall events are causing more frequent instances of sewer overflow, leading to the pollution of water resources and negative environmental, health, and fiscal impacts. At the same time, ... -
State-of-the-art of membrane flux enhancement in membrane bioreactor
Kulesha, Olga; Maletskyi, Zakhar; Ratnaweera, Harsha (Journal article; Peer reviewed, 2018) -
Statistical monitoring and dynamic simulation of a wastewater treatment plant: A combined approach to achieve model predictive control
Wang, Xiaodong; Ratnaweera, Harsha; Holm, Johan; Olsbu, Vibeke (Journal article; Peer reviewed, 2017) -
Strategy for flux enhancement in biofilm ceramic membrane bioreactor applying prepolymerized and non-prepolymerized inorganic coagulants
Kulesha, Olga; Maletskyi, Zakhar; Kvaal, Knut; Ratnaweera, Harsha (Peer reviewed; Journal article, 2019)Considering new legislative and economic restrictions caused by the water crisis, this work focuses on a more efficient wastewater treatment process, which combines biological treatment in a moving bed biofilm system with a ... -
Study of Sludge Particles Formed during Coagulation of Synthetic and Municipal Wastewater for Increasing the Sludge Dewatering Efficiency
Ratnaweera, Harsha; Smoczynski, Lech; Kalinowski, Slawomir; CRETESCU, Igor; Smoczynski, Michal; Trifescu, Mihaela; Kosobucka, Marta (Journal article; Peer reviewed, 2019) -
Treatment of landfill leachate with different techniques: an overview
Mojiri, Amin; Zhou, John; Ratnaweera, Harsha; Ohashi, Akiyoshi; Ozaki, Noriatsu; Kindaichi, Tomonori; Asakura, Hiroshi (Journal article, 2020) -
Treatment of municipal wastewater in a granular sludge reactor : correlations between fluorescence fingerprints of wastewater and the behavior of nutrients during anaerobic and aerobic reactor phases
Øverbø, Simen Lunderød (Master thesis, 2019)Omfattende studier har blitt gjennomført for å forstå de biologiske prosessene som inngår i behandling av avløpsvann i bioreaktorer med granulært slam. En teknologi på fremmarsj som har potensiale til å bidra til en ... -
Utvikling av soft sensorer for prediksjon av avløpsparametere
Hafnor, Håkon Klem (Master thesis, 2018)Analysering av avløpsvann i lokale områder av et ledningsnett, er generelt svært lite utbredt i det kommunale avløpsnettet i Norge. En karakterisering av avløpsvannet i ledningsnettet vil kunne gi viktig informasjon om ... -
What effect does rehabilitation of wastewater pipelines have on the share of infiltration and inflow water (I/I-water)?
Sola, Kristin Jenssen; Bjerkholt, Jarle Tommy; Lindholm, Oddvar Georg; Ratnaweera, Harsha (Peer reviewed; Journal article, 2021)Infiltration and inflow water (I/I-water) is a big challenge in sewage systems in many countries. I/I-water above an acceptable level indicates that the sewage system is not functioning properly. I/I-water leads to increased ...