Updated on April 2, 2014
Overview: Our project is focused on designing an anaerobic digester (AD) for biosolids produced by City of Wyoming and City of Grand Rapids WWTPs. The two municipalities partnered to form GVRBA (Grand Valley Regional Biosolids Authority) to address strict regulations and implement a better and efficient biosolids management. Currently, 75% of the waste water from the City of Wyoming's bio solids are lime stabilized then used for farm application. Bio solids from the City of Grand Rapids are dewatered by centrifuge and sent to a land fill which is not harvesting the energy available. Figure 2 shows the current biosolids management across the two WWTPs. Energy capture and nutrient recovery (phosphorus) are our primary drivers when designing the digester.
Our project requirements will start with research to see alternative treatment and reviewing past bio solids treatment designs for municipalities. This will look into:
This project will also include designing the method of mixing, generator requirement, and method of heating. Final Design will have a full detailed cost break down of system components.
A bench-scale model will be built to optimize system efficiency. The analysis of the bench-scale model will include: