The City of Corvallis wants to harvest and recycle nutrients from landfill leachate to create a revenue stream for the city while cleaning up its wastewater. Last year, a College of Engineering senior project team worked with Multiform Harvest, Inc. and the City of Corvallis Wastewater Reclamation Plant to make a fertilizer called struvite from landfill runoff at the Coffin Butte Landfill. However, the 2011 team discovered that excess calcium was interfering with the reclamation process, so this year’s team addressed that issue. Continue reading →