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Potentials of GHG reductions from wastewater treatment for the CDM

Science China(Technological Sciences) 2011年第7期54卷 1649-1654页

作者： takaaki furubayashi Toshihiko NAKATA Department of Management Science & Technology Graduate school of Engineering Tohoku University

The study aims to evaluate the potential of GHG （greenhouse gas） reductions by installing an anaerobic digester in a wastewater treatment facility in Southeast Asia. Then the break-even point of additional investment to reduce GHG is obtained by exchanging carbon price as emissions credits. In the project scenario, the wastewater treatment system has the digester, where methane （biogas） is produced and recovered. Compared with the baseline scenario, the biogas has calorific value to produce heat and electricity, and can substitute fossil fuels for power generation. The objective of the study is to define the relationship between CERs （certified emission reductions） and investment costs, and the beak-even point, finding out the dominant pa- rameters in the system. Financial parameters such as capital costs and operating costs are considered to evaluate the investmerit costs. The result shows that the methane recovery reduces 54% of GHG emissions. Although the substitution of the biogas for the fossil fuels reduces only 6% of the GHG emissions, the electricity output can satisfy the electricity consumption. The results also show that the maximum CER credit is 73000 t-COEe/a, and the GHG reduction cost is 14 USD/t-CO2e.

关键词： wastewater treatment system anaerobic digestion GHG reductions developing countries CDM

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The role of biomass energy in a 100%renewable energy system for Akita prefecture,Japan

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Energy Storage and Saving 2022年第3期1卷 148-152页

作者： takaaki furubayashi Graduate School of Engineering Science Akita UniversityAkita0108502Japan

This study aims to add the biomass power to the 100%renewable energy system for Akita prefecture in the previous study,and to analyze the energy cost and availability of each *** was assumed that the onshore wind power potential would be installed,and the target area was *** heat and transportation demand were supplied using renewable electricity and carbon free *** renewable energies and electricity demand were analyzed,and the surplus electricity amount was *** the electricity demand cannot meet renewable energy,the shortage was supplied by *** scenarios were considered such as“no biomass”scenario that the biomass power was not installed,“supply shortage”scenario that the biomass power operated when the electricity demand could not meet other renewable energy,and“baseload”scenario that the biomass power operated *** a result,although installed biomass power capacity was much smaller than installed wind power,the biomass power reduced the required battery capacity and increased its *** energy costs of all demand sector in“baseload”scenario were smaller than“no biomass”scenario.

关键词： 100%renewable energy system Biomass power Battery Hydrogen Wind power Rural area

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