Singapore is planning to build a fifth plant to burn the nation's burgeoning amount of solid waste and turn it into energy.
The National Environment Agency (NEA) called a tender for consultants to manage the project that involves procuring a new incineration plant and overseeing its design and construction.
There are four waste-to-energy plants currently running, the oldest being at Tuas, which started operating in 1986.
The new plant is expected to be completed by 2018. With a capacity of at least 2,400 tonnes per day, it will be the second-largest plant here, after the one at Tuas South.
"The four current waste-to-energy facilities have sufficient capacity to cope with the daily amount of waste generated," an NEA spokesman said. "However, a new waste-to-energy plant will be required to meet the projected increase in demand for waste incineration services."
The amount of waste disposed of - excluding what is recycled - has gone up about 13 per cent from a decade ago, a trend that is set to continue with population and economic growth, she added.
Singapore recycles 60 per cent of its waste, and the rest is burnt or put into landfill. In 2012, it burnt 7,475 tonnes of waste per day, up from 7,277 tonnes a day in 2011. The electricity derived is less than 3 per cent of the island's needs.
Some 57 per cent of non-recycled waste comes from domestic and commercial sources, with the rest from industry.