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A detailed biosolids management study was conducted for the 6.5 MGD wastewater plant in the Village of Carol Stream, IL, to verify the cost effectiveness of the current practices and plan for future changes to the program. The study included an evaluation of eight biosolids management alternatives:

Aerated static pile composting (Class A);

In-vessel composting (Class A);

Air drying (Class A);

Thermal drying (Class A);

Alkaline stabilization (Class A);

Alkaline stabilization (Class B);

Cannibal solids reduction with land application (Class B), and;

Landfilling (disposal).

Using a combination of capital and annual costs with several non-monetary evaluation criteria, the Cannibal® solids reduction process was selected as the best future biosolids management alternative to the current cost effective landfill disposal practice. Landfill disposal has been used due to Illinois EPA restrictions on land application of biosolids that are not below 70% volatile solids, despite meeting federal volatile solids reduction standards through the existing aerobic digestion system.

This paper will discuss the biosolids management study procedures and findings, and the specific details and assumptions about the selected Cannibal® solids reduction system.

Document Type: Research Article


Publication date: January 1, 2007

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