Application of Process Simulators and CFD to Optimize Process Capacity of WRRFs November 13, 2017 OPTION TO INCLUDE CIRCULAR BC ICON DRAFT: Icon is Optional Date or speaker or subtitle BC SmartArt Color Sequence Blue 0 158 209
Brown and Caldwell Green 118 176 67 Light Gray 192 202 199 Orange 245 130 32
Gray 149 157 147 Purple 51 42 134 3 Name of Presentation or Other Text Subsection Title or Presenters Name Brown and Caldwell
4 Modeling Platforms inCTRL SIMBA# EnviroSim BioWin 2Dc and 2Dr ANSYS Fluent
Dynamita SUMO Hydromantis GPS-X MIKE WEST FLOW Science FLOW-3D Hydraulic Modeling ??? Brown and Caldwell 5 Case Study #1: Lynchburg, VA Date or speaker or subtitle Intro Sentence Before Bullets To change the slide layout (grid) or to change the color of the top bar: Select the slide thumbnail along the left side. Right Click and go to Layout Choose the corresponding color and/or layout
to apply to the slide. Avoid using the Design tab to change layouts or color themes, there is an application bug that causes PowerPoint to crash. Brown and Caldwell 7 OPTION TO INCLUDE CIRCULAR BC ICON Case Study #2: HRSD, Williamsburg, VA Date or speaker or subtitle Process Flow Diagram
Brown and Caldwell 9 E ffl u e n t S u s p e n d e d S o l i d s ( m g / L ) 3.5 g/L - 77 SVI 3.5 g/L - 105 SVI 4.0 g/L - 77 SVI 4.0 g/L - 105 SVI 4.5 g/L - 77 SVI 4.5 g/L - 105 SVI 60 50 40 30
20 10 0 0 200 400 600 800 1000 1200 1400
Time (min) Brown and Caldwell 10 Can pass 55 MGD peak hour flow Do not need to consider plant expansion as part of Regional Wet-weather Management Plan Click icon to add picture Click icon to add picture Brown and Caldwell 11
Case Study #3: Pueblo, CO SIMBA# Process Flow Diagram NITRATERECYCLE PRIMARYSETTLER GRITREMOVAL UVDISINFECTION SCREEN INFLUENT ARKANSAS RIVER ANAEROBIC ANOXIC
AEROBIC RETURNACTIVATEDSLUDGE(RAS) ANOXIC GRAVITYTHICKNER DAF WASTEACTIVATED SLUDGE ANAEROBIC DIGESTER CENTRIFUGE DRYINGBED SLUDGESTORAGE HAULINGTO
LANDFILL Parameter Annual Median 95th Percentile TP 1.0 mg/L 2.5 mg/L TIN 15 mg/L
20 mg/L Existing Biological Reactor Configuration IMLR RAS DO Probe s Primary Effl uent To Secodary Clarifiers RAS IMLR
NH4 and NOx Probes Existing DO Control Loops Proposed AvN Control Loop AvN AirDistributionControl AirDistributionControl (8X) DOSet-point NH4 / NOxSet-point DO Controller Graded Deadband DOReactor Flow Control Valve Position f(DO) 1X
DOSetpoint %FCVSetpoint FCV Controller Maintains the %FCV Setpoint NH4 / NOxReactor NH4 Controller PID DO f(NH4/ NOx) DOReactor DO Controller PI SCFM f(DO) Current %FCV SCFM Setpoint
8X Current SCFM Airflow Controller PI Flow Control Valve Position f(SCFM) %FCVSetpoint AirSupplyControl (1X) Most Open Valve Linear CMP Set-point f(%FCV of MOV) Current %FCV AirSupplyControl (1X) CMP Setpoint Blower Speed Controller PID Blower Speed f(CMP)
Current CMP Most Open Valve Linear CMP Set-point f(%FCV of MOV) Current %FCV CMP Setpoint Blower Speed Controller PID Blower Speed f(CMP) Blower Switching Duty-Assist Combination f(Blower Speed) Current %FCV FCV Controller Maintains the %FCV Setpoint
Min/ MaxThreshold Blower Speed Blower Switching Duty-Assist Combination f(Blower Speed) Current CMP Min/ MaxThreshold Blower Speed AvN and DO Control Loops AvN AvN Control Loop To be added to the existi existing control control structure
Modeling Aeration Control AvN Modeling Summary Parameter s Eff. TIN Eff. TAN DO TP Annual Median
5.2 2.6 0.4 0.6 Max Day 10.8 4.9 0.8 1.6 OPTION TO
INCLUDE CIRCULAR BC ICON Case Study #4: MWS, Nashville, TN Date or speaker or subtitle Table Sample South Grit Facility Intermediate Screw Pumping Station Excess Flow Treatment North Grit
Facility Tertiary Filters (abandoned) and South Chlorine Contact Tanks North Chlorine Contact Tanks South Primary Clarifiers (13) North Primary Clarifiers (6) South Secondary Clarifiers (6) Aeration Tanks(8)
North Secondary Clarifiers (8) Brown and Caldwell 19 Brown and Caldwell 20 Secondary Clarifier Testing MODEL INPUTS - Sludge Settling Characteristics - Discrete Settling Fractions Brown and Caldwell | 8/2/2012 21
Comparison of Baffling Alternatives WWF vane baffle No baffle No baffle WWF 5x10 chimne y 5x10
chimne y 5x5 conduit with 10 openings Higher surface vel and roll RAS RAS RAS Title Page: Icon is Optional
Date or speaker or subtitle Fun new elements to incorporate in your slides Callout for emphasis Brown and Caldwell 24 Callout for emphasis Brown and Caldwell 26
