Hybrid input-output analysis of wastewater treatment and environmental impacts: A case study for the Tokyo Metropolis
This paper proposes a new hybrid input-output model designed to analyze both the generation and treatment of wastewater. This model, named wastewater treatment input-output model (WWIO), can be regarded as an extension of the waste input-output model (WIO) (Nakamura, S. and Kondo, Y., 2002. Input-output analysis of waste management. Journal of Industry Ecology, 6(1): 39-63.). As an application, I compiled the Tokyo Metropolitan WWIO table for 2000, which comprises 482 economic sectors, 11 wastewater treatment sectors, 12 types of wastewater-related waste and 6 types of environmental load. The model was applied to different scenarios to compare alternative wastewater treatment systems. The results indicate that replacing the simple treatment with the high-class treatment improves the quality of treated water while increasing CO2-equivalent emissions. Meanwhile, when the dewatered sludge is incinerated instead of landfilling, both CO2-equivalent emissions and landfill volume decrease.
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- Duchin, Faye, 1990. "The conversion of biological materials and wastes to useful products," Structural Change and Economic Dynamics, Elsevier, vol. 1(2), pages 243-261, December.
- Yasushi Kondo & Shinichiro Nakamura, 2005. "Waste input-output linear programming model with its application to eco-efficiency analysis," Economic Systems Research, Taylor & Francis Journals, vol. 17(4), pages 393-408.
- Okadera, Tomohiro & Watanabe, Masataka & Xu, Kaiqin, 2006. "Analysis of water demand and water pollutant discharge using a regional input-output table: An application to the City of Chongqing, upstream of the Three Gorges Dam in China," Ecological Economics, Elsevier, vol. 58(2), pages 221-237, June.
- Pulido-Velazquez, Manuel & Andreu, Joaquin & Sahuquillo, Andrés & Pulido-Velazquez, David, 2008. "Hydro-economic river basin modelling: The application of a holistic surface-groundwater model to assess opportunity costs of water use in Spain," Ecological Economics, Elsevier, vol. 66(1), pages 51-65, May.
- Velazquez, Esther, 2006. "An input-output model of water consumption: Analysing intersectoral water relationships in Andalusia," Ecological Economics, Elsevier, vol. 56(2), pages 226-240, February.
- Leontief, Wassily, 1970. "Environmental Repercussions and the Economic Structure: An Input-Output Approach," The Review of Economics and Statistics, MIT Press, vol. 52(3), pages 262-271, August.
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