|
|
|
| Cost-benefit analysis of treated wastewater reuse for large public building in Shanghai |
|
|
|
|
Abstract For the issues of treated wastewater reuse in large public building in Shanghai, analysis of the cost and benefit of the project of treated wastewater reuse was performed based on life cycle assessment and Monte Carlo simulation. The cost of the biological contact oxidation treatment process in life cycle concentrated in a range of 2.4027~2.7600 million yuan. At current water price in Shanghai, the whole lifecycle expected benefits mostly ranged from -539.8~-375.4 thousand yuan and return period of investment did not exist within 50 years. When the price is 3.8 yuan per ton, the benefits raise to 230.3~519.4 thousand yuan and cost could be recovered within 18~19 years. If the tariff reached 6.10 yuan per ton, 1.9247~2.6336 million would be achievable and the payback time would reduce to 4~5 years. Consequently, in terms of the cost and benefit of the project of treated wastewater reuse, the present water price in Shanghai was so cheap that it did harm to the promotion of treated wastewater reuse. So the suggestion had been proposed that raising the water price appropriately or subsidizing the project.
|
|
Received: 02 September 2009
|
|
|
|
|
|
|
