A pilot scale fixed bed biofilm reactor used for treating municipal wastewater was modelled to examine greenhouse gas emissions under different operational parameters. For the calculations, GPS-X 6.3 commercial simula...A pilot scale fixed bed biofilm reactor used for treating municipal wastewater was modelled to examine greenhouse gas emissions under different operational parameters. For the calculations, GPS-X 6.3 commercial simulation tool was applied, which coupled the biokinetic modelling with a GHG estimator. Model calibration was based on a twelve-day set of measurements, where the system was operated under near steady-state condition. Simulation results reflected that direct emissions from biological processes are more significant than indirect emissions originating from energy consumption. Optimizing the operational parameters of a wastewater treatment system, a significant amount of GHG emission can be spared （e.g. optimal setup for internal recycle flow and dissolved oxygen levels）, whereas, environmental factors such as temperature can also have a remarkable effect on GHG emissions： rising temperature causes faster biological reactions, increasing the production of greenhouse gases, especially methane, from the inner layers of the thick biofilm.展开更多
文摘A pilot scale fixed bed biofilm reactor used for treating municipal wastewater was modelled to examine greenhouse gas emissions under different operational parameters. For the calculations, GPS-X 6.3 commercial simulation tool was applied, which coupled the biokinetic modelling with a GHG estimator. Model calibration was based on a twelve-day set of measurements, where the system was operated under near steady-state condition. Simulation results reflected that direct emissions from biological processes are more significant than indirect emissions originating from energy consumption. Optimizing the operational parameters of a wastewater treatment system, a significant amount of GHG emission can be spared （e.g. optimal setup for internal recycle flow and dissolved oxygen levels）, whereas, environmental factors such as temperature can also have a remarkable effect on GHG emissions： rising temperature causes faster biological reactions, increasing the production of greenhouse gases, especially methane, from the inner layers of the thick biofilm.
