Metro is going back to the drawing board in its grand plan to convert the Portland area's food scraps into renewable energy, after failing to come to terms with Waste Management to build a processing facility in conjunction with the Portland sewage treatment plant in North Portland.

In January, Metro named Waste Management its top choice among six companies responding to the regional government's request for proposals, and the two spent the good part of a year in fruitless talks trying to agree to contract terms. The two parties couldn't agree on the price Metro would pay to Waste Management and the company's requested guarantee of a certain amount of food scraps needed each day to make the project pencil out.

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