What’s My True Membrane Condition? Lessons Learned from a Large-Scale MBR Facility

Title – 30pt Arial Bold Subtitle 24pt Arial Names, Dates, and Other Things – 16pt Arial (Box can be resized for longer titles) Lessons Learned from a Large-Scale MBR Facility Phill Yi, Wednesday, March 6, 2024 11:00 am Kendra Sveum1, Eugene Wharton1, Kevin Alexander2, Troy Walker2 Loudoun Water Hazen and Sawyer Agenda Background Lessons Learned Process Operation Monitoring Maintenance Conclusions Stringent Treatment Requirements Monthly Water Quality Parameter Units Average Limit Chemical Oxygen Demand (COD) mg/L Total Suspended Solids (TSS) mg/L 1. Total Kjeldahl Nitrogen (TKN) mg/L 1. Total Nitrogen (TN) Annual Concentration mg/L Limit Total Phosphorus (TP) mg/L 0. Turbidity NTU 0.5 n/ E. Coli <2 mL Chesapeake Bay TMDL – Annual TN and TP Waste Load Allocations TN of 134,005 lbs/yr | TP of 3,350 lbs/yr BRWRF Process Flow Diagram Raw Influent Coarse Screens Grit Removal Primary Clarifiers y Fine Screens r a m ri g e P d u Biological Reactor Basins Sl MBR EQ GAC Reclaimed Water WAS UV Thickening Final Effluent Dewatering Anaerobic Digesters Hauled Biosolids MBR Overview System Design Average production = 10 mgd Peak production = 18.8 mgd Trains Zenon System ZeeWeed 500D Space for 5 cassettes 4 installed (future – 5) 48 modules per cassette Upgrade to 52 module cassettes MBR Overview Design Average Flux Air scour blowers Design Peak Flux Backpulse Pumps Permeate Pumps CIP Pumps MBR Overview Phase 1 – SF Modules Phase 2 – SF Modules (2008) (2010).