AWWA ACE69018

This powerpoint presentation begins by presenting a brief overview of a 285-acre spray irrigation facility that will be decommissioned for treatment of municipal wastewater in June 2008. New wastewater pump station was constructed, and MOA allows identification of alternative uses of site such as reuse and reclamation, land application, and treatment of water treatment plant waste streams. Wrenn Road is located less than 5 miles from new 20 mgd D.E. Benton WTP. Phased construction at WTP changes potential uses for Wrenn Road. Wrenn Road spray irrigation evaluation approach is presented, along with waste stream characterization findings, an agronomic evaluation that focused on sedimentation blowdown and DAF solids, and alternative crop required to accommodate application of residuals. Four residuals management alternatives were evaluated and included the following: sedimentation in lagoons with dredging every 1.5 years; spray irrigation of raw sedimentation blowdown; pre-settling in gravity thickener; and, pre-settling in gravity thickener and dewatering with belt filter press. Includes tables.