Blar i UiS Brage på forfatter "Kommedal, Roald"
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Engineered methanotrophic syntrophy in photogranule communities removes dissolved methane
Safitri, Anissa Sukma; Hamelin, Jerome; Kommedal, Roald; Milferstedt, Kim (Peer reviewed; Journal article, 2021-06)The anaerobic treatment of wastewater leads to the loss of dissolved methane in the effluent of the treatment plant, especially when operated at low temperatures. The emission of this greenhouse gas may reduce or even ... -
Evaluation of Biogas Production Potential of Glycol-Containing Industrial Waste from Kårstø Processing Plant
Sapkota, Manju (Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2019-07-06)This research has been carried out to investigate the potential for methane gas production from untreated glycol containing industrial waste water from Kåstrø gas refinery, Tysvær Norway. Biogas methane potential (BMP) has ... -
Evaluation of microalgae nutrient removal efficiency from wastewater cultivated in a photobioreactor under non-ideal conditions.
Taibo Núñez, Roberto (Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2019-12-14)The scope of this project is to Study the long-term performance and wastewater nutrients removal efficiency by microalgae in a PBR under no favourable conditions. COD, TN, TP, NH4+-N, NO3--N, PO43--P, TSS and pH values ... -
Granular sludge bed processes in anaerobic digestion of particle-rich substrates
Tassew, Fasil Ayelegn; Bergland, Wenche Hennie; Dinamarca, Carlos; Kommedal, Roald; Bakke, Rune (Peer reviewed; Journal article, 2019-07)Granular sludge bed (GSB) anaerobic digestion (AD) is a well-established method for efficient wastewater treatment, limited, however, by the wastewater particle content. This review is carried out to investigate how and ... -
Hydraulic Behaviour: A Tracer Study of a Stormwater Detention and Sedimentation System
Perrens, Hazel Margrethe (Master thesis, 2023)Stormwater is of growing concern with increased heavy rainfall and runoff surfaces from urbanisation. The challenges of stormwater has two aspects; risk of flooding and risk of pollution. Road runoff in particular, can at ... -
Investigating phosphate release from EBPR sludge and associated possibility of controlled struvite precipitation at SNJ wastewater treatment plant
Egeland, Mari (Masteroppgave/UIS-TN-IKBM/2018;, Master thesis, 2018-06)The main treatment stage at SNJ Wastewater Treatment Plant was recently upgraded from chemical treatment to mechanical-biological treatment with Enhanced Biological Phosphorous Removal (EBPR). The implementation of EBPR ... -
Investigation of Enhanced Biological Phosphorus Removal (EBPR) Process Performance at SNJ Wastewater Treatment Plant (IVAR)
Lilleland, Ayu Rahmi (Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2019-06-15)This study has investigated the efficiency of phosphorus (P) removal and optimization the function of the Enhanced Biological Phosphorus Removal (EBPR) at SNJ (Sentralrenseanlegg Nord-Jæren), owned by IVAR (Interkommunalt ... -
Investigation on Phosphorus Recovery from Wastewater Sludge as Struvite at SNJ Wastewater Treatment Plant (IVAR): A Pilot-Scale Study
Ramadhania, Nur (Master thesis, 2021)The recovery of phosphorus from wastewater is desirable since it is a limited nutrient and can cause eutrophication in water bodies. This study investigates the potential to recover phosphorus from the sludge generated at ... -
Long-term operation of an anaerobic bioreactor effluent gravity driven membrane system
Bredal, Mikal (Master thesis, 2023)Currently, anaerobic treatment technology stands out as a viable solution for wastewater treatment due to its minimal carbon footprint. The key advantage lies in its capacity to directly convert organics into methane, ... -
Low-temperature anaerobic wastewater treatment by granulated biomass
Safitri, Anissa Sukma (PhD thesis UiS;, Doctoral thesis, 2022-05)In this study, long-term operation of up-flow anaerobic sludge blanket (UASB) system treating real municipal wastewater at decreasing temperatures (25, 16, 12, 8.5, 5.5, and 2.5 °C) and variable organic loading rates from ... -
Modelling particle degradation and intermediate dynamics in a dispersed activated sludge microcosm
Ravndal, Kristin Torgersen; Kommedal, Roald (Peer reviewed; Journal article, 2022)Municipal wastewater consists of a large fraction of particulate organic matter. During biological wastewater treatment these particles undergo extracellular depolymerisation before products are taken up by bacteria (MW < ... -
Nitrogen retention in mature constructed wetlands
Ims, Kine (Master thesis, 2019-06-14)Constructed wetlands are created for the purpose of treating anthropogenic discharges, such as agricultural and urban runoff to reduce the potential of undesirable effects in receiving waters. Leikvollbekken is a mature ... -
Oil Spill clean-up methods; state of the art
Shazif, Muhammad (Master thesis, 2022)Treatment of oil spills and natural dissolvable contamination overall is a significant issue; a few methods are being worked on to eliminate oil from water. A few states of the art oil spill clean- up technologies are ... -
Optimization, Quantification and Treatment Efficiency of Algae Grown on Secondary Wastewater Effluent
Carlsen, Rebekka Tjensvoll (Masteroppgave/UIS-TN-IKBM/2018;, Master thesis, 2018-06-14)The main objective of this project is to identify algal strains, which efficiently grow in the specific secondary wastewater effluent from IVAR Wastewater Treatment Plant (WWTP) at Grødaland. Algal cultivation will be ... -
Phosphorus retention in a mature constructed wetland under base flow and storm flow conditions
Luth-Hanssen, Liva (Masteroppgave/UIS-TN-IKBM/2018;, Master thesis, 2018-06)The main objective was to monitor a mature constructed wetland, Leikvollbekken, with respect to phosphorus retention, both over long term and during short storm events. The hypothesis was that the wetland would have a ... -
Retention and biological uptake of phosphorous in the Leikvollbekken constructed wetland
Krahner, Friederike (Masteroppgave/UIS-TN-IMN/2017;, Master thesis, 2017-06-15)Phosphorous is the limiting nutrient for primary production in freshwater systems and excessively applied as inorganic fertilizer in agriculture. Elevated phosphorous concentrations in recipients can cause eutrophication ... -
A review on occurrence and spread of antibiotic resistance in wastewaters and in wastewater treatment plants: Mechanisms and perspectives
Uluseker, Cansu; Kaster, Krista Michelle; Thorsen, Kristian; Basiry, Daniel; Shobana, Sutha; Jain, Monika; Kumar, Gopalakrishnan; Kommedal, Roald; Pala-Ozkok, Ilke (Peer reviewed; Journal article, 2021-10)This paper reviews current knowledge on sources, spread and removal mechanisms of antibiotic resistance genes (ARGs) in microbial communities of wastewaters, treatment plants and downstream recipients. Antibiotic is the ... -
Road runoff particle removal: A case study of the underground sedimentation facility at fv. 505 Skjæveland – Foss-Eikeland
Lode, Magnus Gausel (Master thesis, 2021)With increasing urbanization, the effect of urban runoff on vulnerable recipients increases. Commonly, open wet ponds have been used for treatment of road surface runoff. With increasing urbanization and a focus on reducing ... -
Spent coffee grounds anaerobic digestion: Investigating substrate to inoculum ratio and dilute acid thermal pretreatment
Semaan, Georgeio; Atelge, M.R.; Dune Cayetano, Roent; Kumar, Gopalakrishnan; Kommedal, Roald (Peer reviewed; Journal article, 2022)Spent coffee grounds have the potential of being used in further bioprocesses to produce materials and fuels. In Norway, the relative abundance and ease of collection of this waste substrate make it a candidate for ... -
Struvite formation and dewaterability of digested wastewater sludge from IVAR - SNJ
Castillo, Ana (Masteroppgave/UIS-TN-IKBM/2018;, Master thesis, 2018-06-15)Controlled struvite formation in digested sludge from IVARs main wastewater treatment plant “Sentralrenseanlegg Nord-Jæren (SNJ) was investigated as a way to improve the dewaterability of the sludge. Improving dewaterability ...