Remote Zero-Discharge and Hybrid Reuse Onsite Wastewater Treatment Systems in Virginia

Remote Zero-Discharge and Hybrid Reuse Onsite Wastewater Treatment System in Virginia Bree Mariano, PE and Nitant Desai, PE Tuesday, March 5, 2024, 2: PM Water Reclamation and Reuse in Virginia Regulated under 9VAC25 Chapter Water Reclamation and Reuse Regulation Systems associated with WWTFs permitted through DEQ either through the VPDES or VPA permits Water Reclamation and Reuse Application & Addendum Application, Administrative and Technical Review, Draft Permit, Public Comment Period, Permit Issued. VDOT I- Albemarle Safety Rest Area Water Reclamation and Reuse Facility (WRRF) Albemarle Rest Stops Two highway safety rest areas EB early 1960s; WB early 1970s Afton Mountain in the Shenandoah Valley Each have separate public water systems and mineral oil WWTP Identical, zero discharge WWTP facilities Wastewater discharge permit cannot be obtained for the local watersheds New Water Reclamation and Reuse System Treat to Level Reclaimed Water per Virginia Water Reclamation and Reuse Regulation 10 mg/L of BOD NTU of turbidity 14 colonies/100 mL fecal coliform 10,100 gpd Design Flow Assumed influent characteristics: 5-Day Biochemical Oxygen Demand (BOD ) 5 – 280 mg/L Total Suspended Solids (TSS) – 450 mg/L Total Nitrogen – 145 mg/L 8 Two parallel treatment trains with one MBR system per train Equal volume anoxic & aerated zones for additional nitrogen removal Filtrate pump creates vacuum to pull water through Blower provides aeration and scours membranes. Membrane Biological Reactor (MBR) Design based on a membrane biological reactor treatment system with nitrogen removal. Turbidity above the Pressure in the pre-pressurized tank supplemental water from the SRA Corrective Action Threshold is controls the Reclaimed Water Pumps, potable water system. returned to the Settling Tank. which pull from the Reclaimed Water Effluent goes through UV Storage Tank. Reclaimed Water Storage & Distribution Effluent from HSMBR system is Pre-pressurized tank in the SRA 20% of design flow wasted from the sent to Process Building. building supplies reclaimed water for Reclaimed Water Storage Tank. Virginia Pollution Abatement (VPA) Permitting Issued from DEQ Water Reclamation and Reuse Addendum Reclaimed Water Management (RWM) Plan Monitoring & Effluent Requirements Hybrid Alternative Onsite Wastewater Treatment & Reuse System in Lakeside Golf Course Community Lakeside Community Multi-Phased Approach 18-Hole Golf Course Vacation and YearRound Residential Marina, Driving Range, Club House Source: cutalonglakeanna.com Design Considerations Phase 1: 50,000 gpd Effluent Parameters BOD5: 10 mg/L Buildout: 300,000 gpd TSS: 10 mg/L Chesapeake Bay Nutrient TRC: 1 mg/L Reduction pH: 6.0 – 9. VDH AOSS Permit Total N: 8 mg/L DEQ VPA Permit Total P: 0.3 mg/L Turbidity: NTUs Level Reuse Image source: cutalonglakeanna.com Treatment Process Barden-pho Biological Treatment Ultrafiltration Membranes Expandability Rendering by Innovative Treatment Products.