Sound Global says it has won 18 projects from a group of urban-rural waste water treatment plants in Changsha County, Hunan province, China, totalling RMB275 million ($53.5 million) in investments.

The projects include the investment, building, operation and transfer of 16 urban-rural waste water treatment plants (with a total capacity of 29,400 tonnes per day) with a concession period of 30 years.

In addition, Sound Global will operate and maintain two completed waste water treatment plants (with a total capacity of 5,000 tonnes per day) with the same 30-year concession period.

The projects are expected to start in late December, 2011.