Browsing USN Open Archive by Author "Wakjera, Eshetu Janka"
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Bicarbonate for microalgae cultivation: a case study in a chlorophyte, Tetradesmus wisconsinensis isolated from a Norwegian lake
Umetani, Ikumi; Wakjera, Eshetu Janka; Sposób, Michal; Hulatt, Christopher Jonathan; Kleiven, Synne; Bakke, Rune (Peer reviewed; Journal article, 2021)Bicarbonate was evaluated as an alternative carbon source for a green microalga, Tetradesmus wisconsinensis, isolated from Lake Norsjø in Norway. Photosynthesis, growth, and lipid production were studied using four inorganic ... -
Effect of Intermittent Aeration in a Hybrid Vertical Anaerobic Biofilm Reactor (HyVAB) for Reject Water Treatment
Sivalingam, Vasan; Dinamarca, Carlos; Wakjera, Eshetu Janka; Kukankov, Sergey; Wang, Shuai; Bakke, Rune (Peer reviewed; Journal article, 2020)Water from anaerobic sludge dewatering (reject water that is recycled to the inlet main process treatment) from the Knarrdalstrand municipal wastewater treatment plant in Porsgrunn, Norway, contains 2.4 g/L of total chemical ... -
Enhanced Digestate Nitrification in Sequencing Batch Reactors (SBR)
Gyawali, Sandeep (Master thesis, 2021)The liquid fraction of digestates from anaerobic digestion contains a high concentration of Ammonium, which can be transformed into liquid “organic fertilizer”. Direct application of these digestates as fertilizer would ... -
Microbial induced corrosion (MIC) effects on wastewater treatment plant infrastructures
Sanidanesh, Zahra (Master thesis, 2024)This thesis provides a comprehensive analysis of Microbial Induced Corrosion (MIC) and the influence of hydrogen sulfide (H₂S) on municipal wastewater treatment plants. The primary objective is to investigate the mechanisms ... -
Study on the Start-up of Anammox Process in Lab-scale Moving Bed Biofilm Reactor (MBBR)
Pathak, Sabin (Master thesis, 2021)The discharge of wastewater containing nitrogen compounds is harmful to marine life and human health, hence, many biological nitrogen removal methods are in use in many treatment plants in recent years. Among the several ... -
Testing The Efficacy of Biofilm Based Anammox Process for Nutrient Removal at Low Temperature
Das, Dipaluk (Master thesis, 2024)Nutrient mishandling of wastewater poses a substantial threat to environmental stability as a result of the continuous accumulation of nitrogen-rich effluent in the surface waterbody, which leads to eutrophication and ... -
Treatment of Metformin-Containing Wastewater by a Hybrid Vertical Anaerobic Biofilm-Reactor (HyVAB)
Wakjera, Eshetu Janka; Carvajal Rodriguez, Diego Armando; Wang, Shuai; Bakke, Rune; Saldias Dinamarca, Carlos Antonio (Peer reviewed; Journal article, 2019)Several series of batch and continuous experiments were performed to investigate the removal of metformin and other contaminants from two wastewaters: wastewater I (WWI) containing 4 mg/L metformin and wastewater II (WWII) ...