Biosolids (Sludge) Handling: multiple comments regarding biosolids capacity and the District’s ability to handle and compost additional biosolids generation


Several utilities in Montana rely on composting for compliance with 503c standards for Class A Biosolids. The sludge entering the composting process do not have to meet Class B before introduction into the composting vessels. Capacity of the solids handling system is a labor and composting vessel issue. If the District needs to process more biosolids after MBR implementation, then additional staff time and potentially an additional composting vessel or two will be needed. This is described in Technical Memorandum No. 8.