Comparison of nitrous oxide(N2O)emissions calculations at a Swedish wastewater treatment plant based on water concentrations versus off-gas concentrations  

作　　者：Christian BARESEL Sofia ANDERSSON Jingjing YANG Mikkel Holmen ANDERSEN 

机构地区：[1]IVL Swedish Environmental Research Institute,Stockholm SE-100 31,Sweden [2]Unisense Environment A/S,Aarhus DK-8200,Denmark

出　　处：《Advances in Climate Change Research》2016年第3期185-191,共7页气候变化研究进展（英文版）

摘　　要：Total nitrous oxide(N_2O) emissions from a conventional active sludge process were calculated using a mathematical emission model and dissolved N_2O in the water phase by a N_2O water sensor. Calculated emissions showed good agreement with measured emissions based on concentrations and air?ow in the off-gas ventilation system from the covered process. Various tests for a wide range of potentially affecting parameters indicated robust and reliable emission estimations by the model. Thus, common uncertainties in input data would still provide good emission estimations. Measurements of dissolved N_2O required low maintenance and N_2O emission monitoring based on such measurements might therefore be considered as a signi?cant practical improvement. This would be advantageous especially in non-enclosed wastewater treatment plants(WWTPs) otherwise requiring complex off-gas measurements. As the sensor is connected directly to the WWTPs monitoring and control system, emissions calculations could be incorporated.Total nitrous oxide(N_2O) emissions from a conventional active sludge process were calculated using a mathematical emission model and dissolved N_2O in the water phase by a N_2O water sensor. Calculated emissions showed good agreement with measured emissions based on concentrations and air?ow in the off-gas ventilation system from the covered process. Various tests for a wide range of potentially affecting parameters indicated robust and reliable emission estimations by the model. Thus, common uncertainties in input data would still provide good emission estimations. Measurements of dissolved N_2O required low maintenance and N_2O emission monitoring based on such measurements might therefore be considered as a signi?cant practical improvement. This would be advantageous especially in non-enclosed wastewater treatment plants(WWTPs) otherwise requiring complex off-gas measurements. As the sensor is connected directly to the WWTPs monitoring and control system, emissions calculations could be incorporated.

关 键 词：GHG EMISSIONS Wastewater treatment Nitrous oxide 

分 类 号：X703[环境科学与工程—环境工程] X701