Reuse of Biosolids

What are biosolids?

Biosolids are nutrient-rich organic materials resulting from the treatment of wastewater in a treatment facility.  Biosolids are carefully treated and monitored and must be used in accordance with regulatory requirements.  These residuals can be recycled and applied as fertilizer to improve and maintain productive soils and stimulate plant growth.


Where do biosolids come from?

Biosolids are a specific by-product of wastewater treatment.  The solids handling facilities are comprised of anaerobic digesters, lime stabilization tanks, biosolids thickening and biosolids storage basin. Biosolids from the activated sludge process are thickened by a gravity belt thickener to remove excess water, then stabilized in the anaerobic digesters and lime tanks for additional reduction of organic material. The stabilized organic material is then applied to farmland to beneficially reuse the nutrient value remaining in the residuals.

How does the City utilize biosolids?

The City applies biosolids to agricultural land.  Land application provides an excellent and profitable alternative to landfill disposal by utilizing the recyclable components of wastewater in the production of crops.  Land application of biosolids is a beneficial recycling process with economic and environmental benefits to citizens and area farmers.  The controlled land application of biosolids completes a natural cycle in the environment.  Area farmers enter into an agreement with the City of Wilson to participate in the beneficial reuse of biosolids program.  Interested customers should call 252-399-2492, Monday-Friday, 8:00 am-4:00 pm.

Spreading biosolids