AGGREGATING ORGANICS TO TAP FERTILIZER MARKETS

摘要

In Brown County, WI, a public-private partnership is working on aggregating and processing organic wastes into saleable, nutrient-rich fertilizer products. The Brown County Waste Transformation Initiative, a stakeholder group comprised of industrial, agricultural and municipal entities was formed in 2008 to determine if a regional facility could be developed to manage the county's various streams of organics. Biosolids produced at the Green Bay Metropolitan Sewage District are incinerated and the residual ash is landfilled. FEECO's process for creating pellets starts by mixing the wet feedstock with two parts of dry materials in a paddle mixer. Materials from the paddle mixer go into the rotary dryer after going through a machine that forms the mixture into pellets. The team is currently considering anaerobic digestion for the materials eliminated from the initial testing. These materials are very fiberous.