Roald Kommedal

Førsteamanuensis i miljøteknologi

Roald Kommedal

Kontakt

Telefon: 51831852

E-post: roald.kommedal@uis.no

Rom: KE C-278

Organisasjonsenhet

Det teknisk-naturvitenskapelige fakultet

Institutt for kjemi, biovitenskap og miljøteknologi

Publikasjoner

Vitenskapelige publikasjoner

Semaan, Georgeio; Atelge, M.R.; Dune Cayetano, Roent; Kumar, Gopalakrishnan; Kommedal, Roald

(2022)

Spent coffee grounds anaerobic digestion: Investigating substrate to inoculum ratio and dilute acid thermal pretreatment.

Fuel.

ISSN 0016-2361.

Volum 331.

DOI: 10.1016/j.fuel.2022.125598

(2022)

Effect of temperatures on anaerobic granulated biofilm modelling.

Linköping Electronic Conference Proceedings.

ISSN 1650-3686.

DOI: 10.3384/ecp192030

Ravndal, Kristin Torgersen; Kommedal, Roald

(2022)

Modelling particle degradation and intermediate dynamics in a dispersed activated sludge microcosm.

Linköping Electronic Conference Proceedings.

ISSN 1650-3686.

Basiry, Daniel; Entezari Heravi, Nooshin; Uluseker, Cansu; Kaster, Krista Michelle; Kommedal, Roald; Pala-Ozkok, Ilke

(2022)

The effect of disinfectants and antiseptics on co- and cross-selection of resistance to antibiotics in aquatic environments and wastewater treatment plants.

Frontiers in Microbiology.

ISSN 1664-302X.

Volum 13.

DOI: 10.3389/fmicb.2022.1050558

(2021)

Stability of pH, conductivity and alkalinity in dilute clear water samples exposed to various environmental conditions.

Fundamental and Applied Limnology.

ISSN 1863-9135.

Volum 195.

Hefte 3.

s.211-219.

DOI: 10.1127/fal/2021/1390

(2021)

An Individual-based Model for Simulating Antibiotic Resistance Spread in Bacterial Flocs in Wastewater Treatment Plants.

Linköping Electronic Conference Proceedings.

ISSN 1650-3686.

Hefte 185.

s.436-443.

DOI: 10.3384/ecp21185436

Ravndal, Kristin Torgersen; Opsahl, Eystein; Bagi, Andrea; Kommedal, Roald

(2018)

Wastewater characterisation by combining size fractionation, chemical composition and biodegradability.

Water Research.

ISSN 0043-1354.

Volum 131.

s.151-160.

DOI: 10.1016/j.watres.2017.12.034

(2017)

Environmental Consequences of Polymer Flooding. I: 19th European Symposium on Improved Oil Recovery/IOR Norway 2017.

European Association of Geoscientists and Engineers (EAGE).

ISBN 978-94-6282-209-2.

Ravndal, Kristin Torgersen; Kommedal, Roald

(2017)

Starch degradation and intermediate dynamics in flocculated and dispersed microcosms.

Water Science and Technology.

ISSN 0273-1223.

Volum 76.

Hefte 11.

s.2928-2940.

DOI: 10.2166/wst.2017.467

(2016)

Literature review (short): Fate and effect of produced water containing EOR-polymers. I: 5th international conference on industrial and hazardous Waste management.

Technical University of Crete Chania Crete Greece.

ISBN 978-960-8475-24-3.

s.163-164.

Kataya, Amr Ramzy Abass; Heidari Ahootapeh, Behzad; Hagen, Lars; Kommedal, Roald; Slupphaug, Geir; Lillo, Cathrine

(2015)

Protein phosphatase 2A holoenzyme is targeted to peroxisomes by piggybacking and positively affects peroxisomal β-oxidation.

Plant Physiology.

ISSN 0032-0889.

Volum 167.

Hefte 2.

s.493-506.

DOI: 10.1104/pp.114.254409

Bagi, Andrea; Pampanin, Daniela M.; Lanzén, Anders; Bilstad, Torleiv; Kommedal, Roald

(2014)

Naphthalene biodegradation in temperate and arctic marine microcosms.

Biodegradation.

ISSN 0923-9820.

Volum 25.

Hefte 1.

s.111-125.

DOI: 10.1007/s10532-013-9644-3

Del Villano, Luca; Kommedal, Roald; Fijten, Martin W. M.; Schubert, Ulrich S.; Hoogenboom, Richard; Kelland, Malcolm

(2009)

A Study of the Kinetic Hydrate Inhibitor Performance and Seawater Biodegradability of a Series of Poly(2-alkyl-2-oxazoline)s.

Energy & Fuels.

ISSN 0887-0624.

Volum 23.

Hefte 7.

s.3665-3673.

DOI: 10.1021/ef900172f

Del Villano, Luca; Kommedal, Roald; Kelland, Malcolm

(2008)

Class of kinetic hydrate inhibitors with good biodegradability.

Energy & Fuels.

ISSN 0887-0624.

Volum 22.

Hefte 5.

s.3143-3149.

DOI: 10.1021/ef800161z

(2006)

Effects of initial molecular weight on removal rate of dextran in biofilms.

Water Research.

ISSN 0043-1354.

Volum 40.

s.1795-1804.

(2001)

Processes and modeling of hydrolysis of particulate organic matter in aerobic wastewater treatment - A review.

Water Research.

ISSN 0043-1354.

Volum 45.

Hefte 6.

s.25-40.

(2001)

Quantification of biofilm accumulation by an optical approach.

Journal of Microbiological Methods.

ISSN 0167-7012.

Volum 44.

s.13-26.

(2001)

Modelling production of extracelluar polymeric substances in a Pseudomonas aeruginos chemostat culture.

Water Science and Technology.

ISSN 0273-1223.

Volum 43.

Hefte 6.

s.129-134.

Ydstebø, Leif; Bilstad, Torleiv; Kommedal, Roald

(2000)

Full-Scale experience with enhanced biological phosphorus removal (EBPR) in cold climates.

Journal of Environmental Science and Health. Part A: Toxic/Hazardous Substances and Environmental Engineering.

ISSN 1093-4529.

Volum 35.

Hefte 8.

s.1493-1502.

(1997)

Modelling Temperature Compensation in Chemical and Biological Oscillators.

Chronobiology International.

ISSN 0742-0528.

Volum 14.

s.499-510.

(1995)

Naturbaserte metoder for nitrogenfjerning (Natural treatment systems for nitrogen removal).

VANN.

ISSN 0042-2592.

Volum 3.

s.425-437.

Bøker og kapitler

(2019)

Analysis of the Antibiotic Ampicillin in Activated Sludge: Method Development and Adsorption Studies.

Universitetet i Stavanger.

(2017)

Retention and biological uptake of phosphorous in the Leikvollbekken constructed wetland..

Wold, Anders; Ydstebø, Leif; Kommedal, Roald; Løklingholm, Martin; Bilstad, Torleiv

(2014)

Effect of Sodium on Anaerobic Treatment of Ethylene Glycol. I: Executive Summaries: 4th International Conference on "Industrial and Hazardous Waste Management".

ISBN 978-960-8475-20-5.

s.399-400.

Kommedal, Roald; Bilstad, Torleiv; Ydstebø, Leif

(2008)

Overvåkning og potensiell omdanning av utvalgte organiske miljøgifter i renseanlegg på Nord-Jæren (Monitoring and potential conversion of selected priority organic pollutants in wastewater treatment plants in the North –Jaeren region, Norway).

Universitetet i Stavanger.

ISBN 978-82-7644-357-8.

(2004)

Literature review of aspects relevant for biodegradation in the deep-sea.

ISBN 82-8192-024--6.

(2004)

Degradation of polymeric and particulate organic carbon in biofilms.

Norges teknisk-naturvitenskapelige universitet.

Hefte 2003 : 101.

(2003)

Modeling Pseudomonas aerugionsa biofilm detachment.

Universitetet i Sørøst-Norge/Universitetet i Søraust-Noreg.

Hefte 2003:03:00.

(1998)

Technical solutions in an ecological perspective.

(1997)

Rensing av oljeholdig ballastvann fra Brent Spar (Treatment of oily ballast water from the Brent Spar).

(1997)

Lakse- og aureoppdrett i Rogaland: Forvaltning, forurensning og naturvern (Aquaqulture in Rogaland: Management, pollution and conservation).

Universitetet i Sørøst-Norge/Universitetet i Søraust-Noreg.

Formidling

(2024)

UASB teknologi - Erfaringer fra pilotstudiet på Grødaland.

Fagmøte IVAR;

2024-02-12.

(2024)

Organic Waste Management for Land-Based Fish Farms.

Food for Brain seminar 2024;

2024-03-28.

(2024)

Biogass FoU ved UiS.

Fagmøte Biogass Norge;

2024-03-18.

(2024)

Nytt avløpsdirektiv - Krav og konsekvenser.

Fagmøte IVAR;

2024-03-22.

(2024)

Hvor blir verdiene av i biogassprosessen?.

Folkemøte Årdal 360;

2024-06-18.

(2024)

VA ved UiS – Miljøteknologi. Historien, Hva vi har, Hvordan vi står..

Fagmøte VA;

2024-10-02.

(2023)

Planetens tålegrenser kvantifisert. Hva nå?.

Fagnettverksdag for realfagslærere i Rogaland;

2023-11-14.

(2023)

Hvordan produsere energi fra kloakken din?.

Forsker Standup Forskningsdagene 2023;

2023-09-27.

(2023)

Ikke verdt en dritt?.

ALUMNI UiS;

2023-09-21.

Ravndal, Kristin Torgersen; Kommedal, Roald

(2022)

Modeling particle degradation and intermediate dynamics in a dispersed activated sludge microcosm.

The 63rd International Conference of Scandinavian Simulation Society, SIMS 2022;

2022-09-20 - 2022-09-21.

(2022)

Effect of temperatures on anaerobic granulated biofilm modelling.

63rd International Conference of Scandinavian Simulation Society, SIMS 2022;

2022-09-20 - 2022-09-21.

(2022)

Ecologically engineering methanotrophic photogranules .

13th IWA Specialist Conference on Wastewater Ponds and Algal Technologies;

2022-07-03 - 2022-07-06.

(2022)

Subinhibitory ampicillin concentrations favour spread of plasmid associated resistance genes..

6th International Symposium on the Environmental Dimension of Antibiotic Resistance (EDAR6);

2022-09-22 - 2022-09-27.

Entezari Heravi, Nooshin; Pala-Ozkok, Ilke; Kommedal, Roald

(2022)

Understanding the impacts of chloroxylenol antimicrobial on biological wastewater treatment systems.

6th International Symposium on the Environmental Dimension of Antibiotic Resistance;

2022-09-22 - 2022-09-27.

Kommedal, Roald; Shamsaddini Negeri, Mohammad; Ydstebø, Leif

(2022)

Denitrification of recirculated aquaculture system effluents using fish sludge as primary substrate.

2nd International Conference on Pollution Prevention and Clean Technologies (ICPPCT);

2022-12-01 - 2022-12-02.

(2021)

Rensing og renseeffekter fra landbaserte akvakulturanlegg – Hva kan vi lære fra kommunal renseteknikk?.

Utslipp fra landbaserte fiskeoppdrettsanlegg – teknologi -muligheter og begrensninger;

2021-09-22.

(2021)

Anaerobic municipal wastewater treatment – The solution or part of the solution towards sustainable wastewater treatment?.

1st International Conference on Pollution Prevention and Clean Technologies (ICPPCT);

2021-12-06 - 2021-12-07.

(2021)

An Individual-based Model for Simulating Antibiotic Resistance Spread in Bacterial Flocs in Wastewater Treatment Plants.

SIMS EUROSIM 2021 Conference on Modelling and Simulation - The 62nd International Conference of Scandinavian Simulation Society ;

2021-09-21 - 2021-09-23.

(2020)

Korona, ebola og zombier.

Dagsavisen.

ISSN 1503-2892.

(2020)

Stol på matematikken, ikke magefølelsen.

Forskning.no.

ISSN 1891-635X.

(2020)

Wastewater treatment plants as critical reservoirs for resistance genes - Summary of JPI-EC-AMR JTC 2016 project: Gene-gas .

JPIAMR Online workshop: Interventions to reduce the development and transmission of AMR;

2020-09-03 - 2020-09-04.

Kechasov, Dmitry; Kommedal, Roald; Verheul, Michel; Paponov, Ivan

(2020)

EFFECT OF ORGANIC FERTILISER ON METABOLIC PROFILE OF HYDROPONICALLY CULTIVATED TOMATO.

European RFMF Metabomeeting 2020;

2020-01-22 - 2020-01-24.

Kechasov, Dmitry; Kommedal, Roald; Verheul, Michel; Paponov, Ivan

(2020)

GC-MS og Ion Kromatografi i veksthus.

24. Norske Symposium i Kromatografi;

2020-01-05 - 2020-01-07.

(2019)

Modeling Antimicrobial Resistance Gene Transfer in Wastewater Treatment Plants.

Control Engineering Concepts in Systems- and Synthetic Biology;

2019-05-20 - 2019-05-22.

(2019)

Mechanism of Antibiotic Resistance Gene Spread in Wastewater Treatment Plants Using Activated Sludge.

4th International Conference on Alternative Fuels, Energy and Environment (ICAFEE 2019);

2019-10-18 - 2019-10-21.

(2019)

Modeling of unicellular growth – From Malthus to Food Web models in ecology.

"The Wide World of Maths" lecture series ;

2019-11-13.

(2019)

Nutrient characteristics and biomethane potential of co-digested fecal sludge from land based Atlantic Salmon fish farming.

4th International Conference on Alternative Fuels, Energy and Environment (ICAFEE 2019); Taichung, Taiwan;

2019-10-18 - 2019-10-21.

(2019)

Modelling Antibiotic Resistance Gene Spread in Wastewater Treatment Plants.

JPI-AMR Meeting;

2019-12-05.

(2019)

Modelling Antibiotic Resistance Gene Spread in Wastewater Treatment Plants.

Collaboration Meeting;

2019-12-06.

(2018)

Effect of Low Temperature and Municipal Wastewater Organic Loading on UASB (Up-flow Anaerobic Sludge Blanket) Reactor Performance .

IWA Biofilms: Granular Sludge Conference;

2018-03-18 - 2018-03-21.

(2018)

Integrated Wastewater Treatment Concept for Water Resource Recovery.

IWA EcoSTP18;

2018-05-25 - 2018-06-27.

(2018)

Biodegradability of Enhanced Oil Recovery Polymers in Seawater and Their Effect on the Microbial Community .

Microbial ecology in applied and natural systems;

2018-05-28 - 2018-05-29.

(2018)

A simple mathematical model for antimicrobial resistance gene transfer in wastewater treatment models.

3rd International Conference on Alternative Fuels, Energy and Environment (ICAFEE 2018) & 1st International Conference on Water Resources and Sustainability (ICWRS 2018);

2018-10-28 - 2018-10-31.

(2018)

Low temperature biogas production from municipal wastewater by laboratory scale UASB granules.

3rd International Conference on Alternative Fuels, Energy and Environment (ICAFEE 2018) & 1st International Conference on Water Resources and Sustainability (ICWRS 2018);

2018-10-28 - 2018-10-31.

(2017)

Fate and effects of synthetic polymers - the sub-micro-plastic problem..

No Blue, No Green. Rachel Carson prize 2017;

2017-10-04.

(2017)

Polymer and particle degradation in the seawater .

V November Conference;

2017-11-06 - 2017-11-07.

(2017)

Polymer and Particle Degradation in Seawater - Marine fate of synthetic polymers used for IOR.

Norwegian – Brazilian Business and Science Week;

2017-10-31 - 2017-11-13.

(2017)

Occurrence and fate of priority organic pollutants during wastewater sludge treatment.

Technical university Denmark (DTU) seminar series on Environmental Research;

2017-06-06.

(2017)

Phosphorous retention in a mature constructed wetland – effect of hydraulic loading fluctuations.

Fagmøte Norsk Hydrologiråd;

2017-04-24.

Kommedal, Roald; Ydstebø, Leif; Bilstad, Torleiv

(2016)

Occurrence and Fate of Priority Organica Pollutants during Wastewater Sludge Treatment.

International Conference on Industrial and Hazardous Waste Management;

2016-09-27 - 2016-09-30.

Wold, Anders; Ydstebø, Leif; Kommedal, Roald; Løklingholm, Martin; Bilstad, Torleiv

(2016)

Anaerobic treatment of slop water.

Industrial and Hazardous Waste Management.

ISSN 2241-3138.

s.261-262.

Kommedal, Roald; Ydstebø, Leif; Bilstad, Torleiv

(2016)

Occurrence and fate of priority organic pollutants during wastewater sludge treatment.

Industrial and Hazardous Waste Management.

ISSN 2241-3138.

s.331-332.

(2016)

Environmental fate and effects of polymer produced water.

5TH INTERNATIONAL CONFERENCE ON INDUSTRIAL AND HAZARDOUS WASTE MANAGEMENT;

2016-09-27 - 2016-10-01.

(2016)

Environmental fate and effects of polymer produced water II.

5TH INTERNATIONAL CONFERENCE ON INDUSTRIAL AND HAZARDOUS WASTE MANAGEMENT;

2016-09-27 - 2016-10-01.

(2016)

Will we find ET and would we know?.

NORTH Creative Network Event;

2016-03-10 - 2016-03-13.

(2016)

Constructed wetlands for agricultural runoff remediation – effects on bioavailability of phosphorus.

32nd Congress of the International Society of Limnology;

2016-07-31 - 2016-08-05.

(2016)

Annual Phosphorus Retention Efficiency of a Constructed Wetland Treating Diffuse Agricultural Runoff.

32nd Congress of the International Society of Limnology;

2016-07-31 - 2016-08-05.

(2016)

Biologisk energiproduksjon.

Åpen fagdag;

2016-11-13.

(2016)

Leikvollbekken – Fosforbalanse og renseeffekt.

Renseparker - Virker de? ;

2016-11-08.

(2016)

Fosforfangst i våtmarksplanter – Hvor mye kan fjernes?.

Renseparker - Virker de?;

2016-11-08.

Christ, Inge; Kommedal, Roald

(2016)

Biogassforskning ved UiS.

(2015)

The Effects of Corexit 9500 on Oil Biodegradation at Cold Temperatures.

5th International Symposium on Applied Microbiology and Molecular Biology in Oil Systems;

2015-06-02 - .

(2015)

Polymers in the Environment - Fate and Effects.

National IOR center seminar;

2015-11-13.

(2015)

Biologisk nedbrytbarhet: Forsøksdesign og Dataanalyse.

Fagdagen UiS;

2015-11-13.

Bagi, Andrea; Pampanin, Daniela M.; Lanzén, Anders; Bilstad, Torleiv; Kommedal, Roald

(2014)

Arctic bacteria are “as good as” temperate counterparts in removing toxic oil components from the marine environment.

5 th NETS (Norwegian Environmental Toxicology Symposium);

2014-10-22 - 2014-10-24.

(2014)

Meeting at UiS 16. June 2014 Professor Johan Sjøblom (Ugelstad Laboratory, NTNU).

Meeting at UiS 16. June 2014 Professor Johan Sjøblom (Ugelstad Laboratory, NTNU);

2014-06-16.

(2014)

The National IOR Centre of Norway - Research highlights abd ambitions.

Besøk av statssekretær Bjørn Haugstad;

2014-11-04.

(2014)

100-års jubileum for den viktigste oppfinnelsen i rensing av vann.

Åpent Universitet 2014;

2014-09-28.

(2014)

Aktivt Slam Prosessen - Ny, gammel renseteknologi.

Åpen dag;

2014-03-11.

Wold, Anders; Ydstebø, Leif; Kommedal, Roald; Løklingholm, Martin; Bilstad, Torleiv

(2014)

Effect of Sodium on anaerobic treatment of Ethylene Glycol.

4th International Conference, Industrial and Hazardous Waste Management;

2014-09-02 - 2014-09-05.

(2013)

Hvem, Hva, Hvor (mye)? GCMS: Miljøkjemikerens organisk foretrukne....

Åpen Fagdag, UiS;

2013-11-13.

Ravndal, Kristin Torgersen; Kommedal, Roald

(2013)

Bacterial polymer degradation in natural river water.

5th IWA Specialist Conference on Natural Organic Matter Research;

2013-10-01 - 2013-10-04.

Ravndal, Kristin Torgersen; Kommedal, Roald

(2012)

A quantitative model of bacterial particle and polymer degradation in aquatic systems.

14th International Symposium on Microbial Ecology;

2012-08-19 - 2012-08-24.

Ravndal, Kristin Torgersen; Bagi, Andrea; Kommedal, Roald

(2012)

The effect of hydrostatic pressure on biodegradation of a mixture of benzene, toluene, ethylbenzene and o-xylene.

14th International Symposium on Microbial Ecology;

2012-08-19 - 2012-08-24.

Kelland, Malcolm Andrew; Hoogenboom, Richard; Del Villano, Luca; Kommedal, Roald; Schubert, Ulrich S.; Fijten, Martin W. M.

(2012)

POLY(2-OXAZOLINE)S AS KINETIC GAS HYDRATE INHIBITORS.

243rd ACS National Meeting & Exposition;

2012-03-25 - 2012-03-29.

Bagi, Andrea; Lanzén, Anders; Bilstad, Torleiv; Kommedal, Roald

(2012)

Naphthalene degrading prokaryotic communities of Arctic and Temperate seas.

International Symposium on Microbial Ecology (ISME) 14 ;

2012-08-19 - 2012-08-24.

(2012)

Hydrolysis of particulate and polymeric substances in biofilms.

EAWAG workshop 30 November 2012;

2012-11-29 - 2012-11-30.

(2012)

Olje og Miljøsikkerhet.

Populærvitenskapelig workshop/kunst utstilling;

2012-10-12 - 2012-10-14.

Kommedal, Roald; Bagi, Andrea; Bilstad, Torleiv; Brakstad, O.G.

(2010)

Biodegradation of naphthalene in Temperate and Arctic marine environment.

13th International Conference on Microbial Ecology (ISME13);

2010-08-22 - 2010-08-27.

Kelland, Malcolm; Kommedal, Roald; Del Villano, Luca

(2008)

A Class Of Kinetic Hydrate Inhibitor With Good Biodegradability.

6th International Conference on Gas Hydrates (ICGH6);

2008-07-06 - 2008-07-10.

(2001)

Degradation of dextran in biofilms: size effects, enzyme location and intermediate formation.

4th annual BioToBio meeting;

2001-09-13 - 2001-09-15.

(2001)

Process and modeling of hydrolysis of particulate organic matter in aerobic wastewater treatment : a review.

5th Kollekolle Seminar on Activated Sludge Modelling;

2001-11-10 - 2001-11-12.

(2000)

Pseudomonas aeruginosa biofilm detachment.

Biofilms 2000;

2000-07-16 - 2000-07-20.

(2000)

Modelling Pseudomonas aeruginosa EPS production.

Biofilms 2000;

2000-07-16 - 2000-07-20.

(2000)

Biofilm reactor design.

3rd annual BioToBio meeting;

2000-11-27 - 2000-11-28.

(2000)

Modelling production of extracellular polymeric substances in a Pseudomonas aeruginosa chemostat culture.

International Specialist Conference on Microbial Extracellular Polymeric Substances;

2000-09-18 - 2000-09-20.

(2000)

Pseudonas aeruginosa biofilm detachment.

International Specialist Conference on Microbial Extracellular Polymeric Substances;

2000-09-18 - 2000-09-20.

(1999)

Hydrolysis of adsorbed particulate organic matter in arobic films.

4th International Conference on Biofilm Systems;

1999-10-17 - 1999-10-21.

(1997)

A wastewater and sludge treatment process integrating biofilms, wetlands and aerobic sludge digestion for nutrient recovery.

Nordisk konferens; Kväverening och biologisk fosforrening;

1997-02-02 - 1997-02-03.