1. WASTE HAULERS ARRIVE AT RRT
Over 75 different waste haulers in the Twin Cities metro area deliver waste to the RRT facilities at Newport, St. Paul, Empire township, and South Metro. Each day, 175-250 trucks deliver MSW (Municipal Solid Waste) to the Newport facility. RRT receives over 375,000 tons of MSW annually at its Newport processing facility.
RRT partners with the Ramsey-Washington County Resource Recovery Board to deliver over 300,000 tons of MSW from the two counties to its Newport facility each year. In addition to Ramsey and Washington counties, Dakota, Scott, and Carver counties all deliver waste to the Newport facility for processing.
2. WASTE IS DELIVERED TO THE TIP FLOOR
Waste is delivered by the haulers to our tip floor. Our facility is covered and has a solid concrete tip floor. The tip floor is 68,000 square feet and can hold up to 5,000 tons of MSW.
3. BULKY WASTE IS REMOVED FROM THE WASTE STREAM
Before waste is processed, grapple cranes remove bulky waste from the waste stream such as concrete and swing sets. The bulky waste is sent directly to the landfill.
4. METALS ARE RECOVERED FROM THE WASTE STREAM
Metals are recovered from the waste stream. A series of magnets are used to collect ferrous metals and an eddy current is used to collect non-ferrous metals. RRT recovers over 13,000 tons of metals from its waste stream each year.
5. OTHER NON-COMBUSTABLE PRODUCTS ARE REMOVED
Finer particles such as dirt and smaller rocks are removed from the waste stream using a series of disc screens.
6. THE FINAL PRODUCT OF RDF IS PRODUCED
After the removal of metals and fine particles from the waste stream, the final RDF (refuse derived fuel) product is ready for shipment to the burn plants. RDF mainly consists of a combination of paper and plastic products.
7. RDF IS SHIPPED TO MASS BURN FACILITIES
RDF is shipped to the Xcel burn plants located in Red Wing and Mankato, MN. RRT ships over 310,000 tons of RDF to Xcel each year. Together, these plants produce approximately 43 MW of electric power each year.
The energy is considered “baseload power” – a dependable, reliable source of energy that can be distributed by the electric utilities any time of day.
As Minnesota utilities (e.g. Xcel) work to implement the recent mandate that 30 percent of the state’s electricity come from renewable fuel sources, RRT’s dependable, renewable biofuel should continue to be an important part of Xcel’s energy plan.