Global private equity firm Nature Elements Capital received an internal rate of return of about 40 percent from Chongqing Sanfeng Environmental Industry Group Co Ltd by selling its shares to Chongqing Water Group.

CSEG is a leading stoker manufacturer as well as a waste-to-energy project developer and operator. Through introducing and improving technology from the Martin Company of Germany, CSEG has established itself as one of the biggest stoker manufacturing bases in China.

"Our fund investors are very pleased to see an attractive return within a relatively short period," said KK Chan, CEO of Nature Elements Capital.