CAMBRIDGE, Mass. - The contraption sits in a basement lab at the Massachusetts Institute of Technology, a mishmash of hoses, wires, whirring pumps and a 12-foot-high plastic tower filled with steam and dripping water, all set on plastic milk crates.

It looks like a high school science project, but it was developed by two postdoctoral mechanical engineers at MIT. And it just might be a breakthrough that creates wealth and jobs in the United States and transforms the white-hot industry of oil and natural gas hydraulic fracturing, or fracking.

That is, as long as the foreign-born inventors aren’t forced to leave the country.

Anurag Bajpayee and Prakash Narayan Govindan, both from India, have started a company to sell the system to oil businesses that are desperate for a cheaper, cleaner way to dispose of the billions of gallons of contaminated water produced by fracking.

Oil companies have flown them to Texas and North Dakota. They say they are about to close on millions of dollars in financing, and they expect to hire 100 employees in the next couple of years. Scientific American magazine called water-decontamination technology developed by Bajpayee one of the top 10 ‘world-changing ideas