Biosolids, or sewage sludge, are the solid byproducts of the wastewater treatment process. Rich in nutrients, they can be used as fertilizer on agricultural fields or compost on lawns. But the process ...

or sewage sludge, are the solid byproducts of the wastewater treatment process. Rich in nutrients, they can be used as fertilizer on agricultural fields or compost on lawns. But the process for ...

or sewage sludge, are the solid byproducts of the wastewater treatment process. Rich in nutrients, they can be used as fertilizer on agricultural fields or compost on lawns. But the process for ...

(AP Photo/Joshua A. Bickel) A front loader dumps compost material made from biosolids on Friday, March 7, 2025, at a facility in Lockbourne, Ohio. (AP Photo/Joshua A. Bickel) Probes monitor the ...