Vi söker exjobbare till nedanstående exjobb!!
Methane formation in sewer systems
IPCC (2006) stated that “wastewater in closed underground sewers is not believed to be a significant source of CH4”. However, in 2008, Guisasola et al. (Water Research 42:6-7, 1421-1430, 2008) observed in field measurements that there was a potential of methane emissions from a sewer system in Queensland, Australia, which equalled to 15–65% of the CO2 emission due to energy consumption for the treatment of the wastewater. Since Guisasola et al. (2008) published their results some more work has been done on dissolved methane in rising main sewers in Australia (e.g. Foley et al. in Water Science & Technology 60:1, 2963-2971) and on measuring methane in the gas phase at pumping station fed by gravity sewers in Georgia, USA (Global Water Research Coalition, Report 2011-29). Methane formation in sewer system seems still be a much unexplored subject.
VA SYD is a statutory joint authority operating the water and wastewater works in the municipalities of Malmö, Lund, Burlöv and Eslöv. The authority is working with determining its carbon footprint. Some work has been done on wastewater treatment (Gustavsson et al. 2011), and now the impact of the methane formation in the sewer system will be investigated. The novelty of this master thesis is very high and it will hopefully help the water business to decrease its impact on global warming.
The aim of this master thesis is to develop a procedure for reliable measurement of methane in wastewater in order to investigate the methane content in the wastewater in the sewer system (pressurised and gravity sewers, downstream industries etc) and at the head of the wastewater treatment plant in Malmö. The total methane emissions from the sewer system in Malmö shall be estimated and solutions for decreasing the emissions shall be discussed.
A method for sampling, storage and analyses of methane in wastewater will be developed. Grab samples of wastewater will be analysed for methane content at several point and occasions where the probability of methane formation is thought to be high. A geographical information system (GIS) and general knowledge about the sewer system in Malmö will be used to find the most interesting spots.
Associate professor: Karin Jönsson, Lund University.
Supervisor: Professor Jes la Cour Jansen, Lund University. Co-supervisors: David Gustavsson, VA SYD, and Tomas Wolf, VA SYD.
February 2012 – June 2012
Send an e-mail with a few words about you, your educational background and why you are interested in this master thesis project to David Gustavsson at VA SYD.