The Wastewater Treatment Facility (WWTF) for the Town of Christiansburg (Town) produces treated thickened biosolids. Activated sludge is placed into primary and secondary anaerobic digesters on a daily basis. Then, sludge from the digesters is processed through a gravity belt thickener, producing a thickened sludge of approximately 3-5% solids. For over thirty (30) years, the Town has hired a Contractor to haul and apply the thickened biosolids on nearby agricultural tracts of land (application sites), with the permission of landowners. The Contractor also will be responsible for maintaining records and generating reports for Federal and State regulatory agencies. Total volume of biosolids to be hauled and applied is estimated to be 300 dry metric tons or 1.3 to 3.0 million gallons per year. The Town cannot and will not guarantee a minimum or maximum quantity of biosolids to be hauled and applied.
