Summary

This is a Request for Information (RFI) attachment submitted by WSSC Water (Washington Suburban Sanitary Commission), a Maryland water utility, regarding biosolids product development and market research. The attachment contains detailed chemical characterization data for biosolids and water treatment residuals that WSSC Water is evaluating for blending and beneficial reuse. The RFI seeks information from industry contractors on opportunities to reduce operating costs and establish a sustainable reuse pathway by combining biosolids from WSSC Water's Piscataway Bioenergy Facility with feedstock such as water treatment residuals, sand, and wood fines to improve product quality and value. Contractors are also being solicited for their capability to provide permitted land for biosolids blending and product development operations, with full responsibility for staffing and operational resources.

The chemical characterization data provided includes comprehensive analysis of both Piscataway BioEnergy biosolids and a 50:50 blend of biosolids with Potomac Water Filtration Plant water treatment residuals. The analysis covers physical characteristics (pH, total solids, volatile solids), primary nutrients (nitrogen, phosphorus, potassium), secondary nutrients, micronutrients, 40 CFR 503 regulated metals, and PFAS (per- and polyfluoroalkyl substances) contamination levels. Notably, the Potomac WTR component shows elevated PFAS concentrations across multiple analytes, including PFOS at 0.640 μg/kg and PFHxA at 0.440 μg/kg, which are key considerations for any beneficial reuse pathway development. This market research effort aims to identify viable commercial applications and partners capable of managing these materials at scale.