Publications by authors named "H I Odegaard"
Cold and diluted wastewater is a major challenge for nitrogen removal at wastewater treatment plants. The moving-bed biofilm reactor (MBBR) process has proven suitable for nitrogen removal under these conditions and several full-scale plants have been in operation for more than 20 years. These plants are still performing well, even at above design loads.
View Article and Find Full Text PDFBackground: Endoscopic screening with polypectomy reduces the incidence of colorectal cancer (CRC). Incomplete polyp removal may attenuate the effect of screening. This randomized trial compared cold snare polypectomy (CSP) with hot snare polypectomy (HSP) in terms of complete polyp resection.
View Article and Find Full Text PDFThis research elucidates the pollutants (nutrients and carbon) removal performance and nitrous oxide (NO) emissions of two pilot plants. Specifically, a University of Cape Town (UCT) Membrane Bioreactor (MBR) plant and an Integrated Fixed Film Activated Sludge (IFAS)-UCT-MBR plant were investigated. The plants were fed with real wastewater augmented with acetate and glycerol in order to control the influent carbon nitrogen ratio (C/N).
View Article and Find Full Text PDFThe present paper reports the results of a nitrous oxide (NO) production investigation in a moving bed based integrated fixed film activated sludge (IFAS) membrane bioreactor (MBR) pilot plant designed in accordance with the University of Cape Town layout for biological phosphorous removal. Gaseous and liquid samples were collected in order to measure the gaseous as well as the dissolved concentration of NO. Furthermore, the gas flow rate from each reactor was measured and the gas flux was estimated.
View Article and Find Full Text PDFArticle Synopsis
- The study examined how wastewater salinity and hydrocarbons affect nitrous oxide emissions in a membrane bioreactor.
- During the first phase, increasing salinity showed a link to nitrous oxide emissions, with nitrifiers starting to recover by the end.
- In the second phase, adding hydrocarbons temporarily inhibited biomass activity, reducing nitrous oxide emissions, and highlighting the oxic tank as a key source of these emissions.