DYNAMIC BIOGAS UPGRADING AS KEY TECHNOLOGY FOR LOCAL INTEGRATION OF WASTE WATER TREATMENT, BIOGAS PRODUCTION, WIND AND SOLAR

摘要

The aim of this paper is to give a brief overview of the studies conducted during the emph{LargernScale Bio Energy Lab} concerning biogas upgrading. An integrated process scheme was developed, combiningrnanaerobic digestion as an simple and robust technology for waste treatment with the hydrogen technology forrnrenewable energy storage. A low-strength waste water from a local dairy was used to produce biogas from a twophaserndigestion system was used containing a continuous stirred tank reactor and an anaerobic baffled reactor. Thernanaerobic digestion was followed by a dynamic process possible to run in two states: (i)~the derived biogas can bernutilized via CHP generation or, (ii)~ mixed with hydrogen, so it can be converted into synthetic natural gas by arnchemical process, called Sabatier process. Feasibility studies, simulation and experiments proofed this dynamicrnbiogas upgrading process as an excellent tool for local integration of biomass and waste streams from industryrntogether with renewable hydrogen into existing energy systems.