By David Stanway

WUJIANG, China, Nov 14 (Reuters) - Thousands of tonnes of urban waste are hidden behind scrubbed white walls at a new power plant on the outskirts of the Chinese city of Wujiang, with even its chimney disguised as a clock tower.

Desperate to fight mounting trash problems but wary of public opposition, China is building new incineration capacity designed to blend into its surroundings and limit environmental damage.

Located in sparsely populated farmland around 60 miles (100 km) west of Shanghai, with white geese dotting the lake around it on three sides, the Wujiang plant is designed to burn 1,500 tonnes of garbage every day.

It generates heat to run turbines that deliver 500,000 kilowatt-hours of electricity to the power grid at preferential tariffs, around double those of coal-fired plants and the source of two-thirds of its revenue.

"Combustion reduces the volume, turns it into a resource and detoxifies it, so we believe it is going to be a mainstream product within 20 years," said Cai Shuguang, deputy general manager of China Everbright International, which built the plant.

With land scarce and consumption surging, China has little choice but to burn as much trash as it can, said Cai.

The landfills encircling Beijing are known collectively as the capital's "seventh ring road", while throughout the country burial of untreated waste has contaminated land and built up potentially hazardous pockets of methane.

About 200 trucks dump up to 10 tonnes of trash each day in a silo 26 metres (28 yards) deep at the Wujiang plant. Toxic emissions are captured and little is wasted, with furnace slag recycled into bricks.

Everbright's first waste-to-energy (WTE) plant was built in nearby Suzhou more than a decade ago. China as a whole had 223 WTE plants by the end of last year, and that number could double by 2020.

But household waste treatment and recycling rates are still way too low, China said in a plan published in September, adding that industry spending would need to reach 192.4 billion yuan ($28 billion) from 2016 to 2020.

The plan aims to incinerate more than 500,000 tonnes of waste a day by then, or 2-1/2 times the 2014 figure. Better-off cities will have to burn most garbage, and curb landfill expansion.

"Waste-to-energy is being encouraged from top to bottom: subsidies are very high and profits far exceed those from recycling," said Zhao Youcai, a waste management expert at Shanghai's Tongji University.

TACKLING NIMBYISM

But China has struggled to reach previous targets, with daily incineration capacity of 235,224 tonnes by the end of 2015 missing a goal of more than 300,000 tonnes.