Search results for "energy costs"
showing 4 items of 4 documents
The fouling phenomenon in membrane bioreactors: Assessment of different strategies for energy saving
2013
Abstract Membrane fouling represents one of the major issues for a membrane bioreactor (MBR). Membrane fouling and high aeration requirements (for inducing shear stress to limit fouling) make MBR operation economically demanding due to high energy costs. Although several studies on MBR fouling have been performed, comprehensive knowledge on how to reduce membrane fouling and consequently save energy is still lacking. An integrated mathematical model for MBR is applied to a University of Cape Town membrane bioreactor with the final aim to reduce the energy costs. In particular, the influence of the aeration intensity, the duration of filtration/backwashing cycles, and the number of membrane …
Towards Climate Neutrality: Economic Impacts, Opportunities and Risks
2023
The monograph has been prepared and published within the framework of the Ministry of Economics research project “Modeling and analysis of the economic impact of climate goals” at the University of Latvia Faculty of Business, Management and Economics Productivity Research Institute “UL think tank LV PEAK”.
The fouling phenomenon in membrane bioreactors: model description and strategies for energy saving
2015
Membrane fouling represents one of the major crucial issues for membrane bioreactor (MBR). Membrane fouling and high aeration requirements (for inducing shear stress to limit fouling) make MBR operation economically demanding due to high energy costs. Although several studies on MBR fouling have been performed, a comprehensive knowledge on how to reduce membrane fouling and consequently energy saving is still lacking. Two scenarios are analyzed and compared each implementing different operating conditions. As expected, MBR operation at low air flow rate (qa) leads to a substantial reduction of the operational costs (namely, 20% respect to the suggested manufacturers ones in terms of qa).
Which firms benefit from investments in green energy technologies? : The effect of energy costs
2019
Abstract Firms will invest in green energy technologies only if these investments have an economic pay-off. Based on unique firm-level data from Austria, Germany, and Switzerland, we find that the marginal effect of investments in green energy technologies on productivity is positive only for the 19% of firms with the highest energy costs. These results have major implications for companies and policy makers regarding the design of green energy policies and incentives.