The Life Cycle Assessment of Carbon Dioxide Emission of Four Major Sewage Treatment Plants in Taiwan

Publisher: Trans Tech Publications

E-ISSN: 1662-7482|2015|764|1154-1158

ISSN: 1660-9336

Source: Applied Mechanics and Materials, Vol.2015, Iss.764, 2015-06, pp. : 1154-1158

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Abstract

The sewage comes from buildings is drained into public sewers. The sewage is then treated in a sewage treatment plant to meet the sanitation standards before being discharged to the water cycle in nature. The sewage treatment process consumes energy and produce CO2. In this research, the idea of streamlined life cycle assessment was applied. The CO2 emission of sewage treatment was assessed from direct energy consumption of four major sewage treatment plants in Taiwan. The results show that the unit CO2 emission of sewage treatment calculated from four plants is 0.174 kg-CO2/m3. The CO2 emission at in-plant sewage treatment stage takes more than 95% of total CO2 emission for most plants. The results suggest that CO2 emission of sewage treatment can be calculated from energy consumption at in-plant sewage treatment stage to simplify the calculation. This database will be important reference for water resource research.