| Summary: | Landfill leachate treatment by advanced oxidation processes has gained much attention in the past decades. The removal of organic pollutants from landfill leachate in particular has been in focus due to their detrimental effects on the environment. This fact also leads to increasingly stringent regulations put in place by the authorities regarding the pollutant removal and adherence to treatment goals. More stringent regulations for landfill leachate treatment are also expected to be effective in Norway in the near future. The new regulations contain a list of priority substances that need to be removed below their detection limit in order to release the effluent after treatment into nearby waterbodies. An appropriate treatment process that is able to accomplish the treatment goals and takes the given local climate conditions into consideration is required. Low average temperatures in subarctic climates provide a significant challenge. The motivation of the present thesis was to find a suitable landfill leachate treatment process that is able to remove priority substances while withstanding cold operating temperatures. An extended literature study was the basis for choosing electrochemical oxidation, an advanced oxidation process, as a suitable treatment process. The majority of electrochemical oxidation studies have been carried out at room or elevated temperatures, while there is a lack of focus on wastewater treatment in cold climates. Furthermore, none assessed the application of advanced oxidation processes. This thesis bridges this knowledge gap and contributes to the applied field of electrochemistry by assessing its applicability under cold operating temperatures. The work is therefore of great interest in light of the increased focus on the technology in arctic regions. This thesis consists of three separate studies: 1. A mechanistic study that helps to understand the ongoing different oxidation processes during the electrochemical oxidation of organic pollutants. 2. A laboratory scale study with a ...
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