Beneficial reuse to the Nth degree
Itasca County, MN (PRWEB) July 13, 2011
In Q3 of 2009 Schwing Bioset was awarded the contract to provide a Bioset System to the Coleraine/Bovey/Taconite Joint Wastewater Commission. This system was the lowest cost when compared to other technologies, and it produces a USEPA Class ‘A’ end product, unlike the other technologies that produced a USEPA Class ‘B’ material. The installation was completed in Q2 of 2011 and is fully operational.
The existing digesters could not meet the USEPA Class B standards in the winter months so the Commission needed to find a solution. After a reasonable amount of due diligence, the Commission secured the services of a local consulting engineering firm to explore alternatives for meeting the USEPA standards year round.
The engineer was faced with several challenges as they began their investigation. The plant was small, processing 0.5 MGD, and most available technologies would not scale down well or work well with intermittent biosolids processing. Another challenge was related to protracted winters and the need to find a place to store Class ‘B’ materials until the ground thawed and the biosolids could be land applied on the Commissions’ hay fields.
After considering options of a new digester, retrofitting the existing digester with heat exchangers, and reed beds, ultimately the Bioset process, Schwing Bioset’s alkaline stabilization process, was selected as the best available technology to meet these challenges.
About Schwing Bioset
For more than 25 years, Schwing Bioset has been helping wastewater treatment plants, mines and power generation customers by engineering material handling solutions. Schwing Bioset’s custom engineered solutions can be found in hundreds of wastewater treatment plants in North America as well as mines and tunnels around the world.