October 13, 2014 Tulsa, OK City of West Palm Beach makes Water Treatment Plant Improvements by Implementing Priority Projects Ron Cass Gert-Jan Schers
Location West Palm Beach 2
Consent Order - 2008 Source Water Protection Staffing and operator certification Disinfection TTHM excursion WQ monitoring plan 10 years to implement a membrane-based treatment system 3
Consent Order 4
Source Waters 5
Conventional Surface Water Treatment Built 1894 Surface water, 47 mgd Conventional treatment Lime addition Enhanced coagulation Media filtration Chloramine residual 6
History Built 1894 Surface water, 47 mgd Late 2007 Operational issues Mid 2008 Operations Improve Mid 2009 Filter upgrades Nov 2011 Chemical mixing & metering Feb 2012 SCADA 2014 Generator building and primary power redundancy 7
Technology Evaluation 8
Condition Assessment Methods 9
Project Priority Five immediate projects year 0-2 Five projects year 3 6 Two projects year 7-10 10
Condition Assessment Funding 11
Facility Access Diverted traffic from Banyan Blvd Valued assets, underground INJ pts Provides Turn lane truck Access Fiber optic connectivity security checkpoint, cameras 12
Watershed Management 13
Training Chlorine Concentration Chloramine Formation NH 2 Cl Chloramine Decomposition NH 2 Cl + NHCl 2 Free Chlorine, HOCl, OCL Applied Chlorine Dose, mg/l Theoretical Breakpoint Chlorination
Filter Upgrades Filter Valves and actuators GAC over sand media replacement SCADA controlled (complete) Laterals and blower rehab 15
Finished Water Turbidity 16
Gaseous Chemical Replacement 2008 Vulnerability Study Significant risk in major metro area Gaseous Chlorine Anhydrous ammonia 2010 Switched to liquid forms Ready for automation 17
Replacement of Chemical Systems Sodium Hypochlorite Aqueous Ammonia Fluoride Corrosion Inhibitor Polymer Sodium Hydroxide 18
Finished Water Chemical Dosing Venturi - flow metering Provides 1 signal for flow pacing Static mixer Accessible injection 19
Finished Water ph 20
Total Chlorine 21
Finished Water Color 22
New 4160V transformers Gear: Double-ended electrical feeds Redundant fed switchboards Closed transition between utility and standby power Electrical FPL Feed 23
Electrical - Generator Building Existing generator problems Too large, façade, enclosures Fan driven rain Loss of power: potential flooding New dedicated generator bldg Gensets, switchgear, ATS, 24 2014
SCADA Process Monitoring - Historic 1990 Transition from manual to automatic Analog signals for process monitoring 1996 Facility upgrade MOVs for process control, S5 PLCs 2007 Filter upgrade Actuators, PakScan, S7 PLCs 2008 Booster pump station Radio Network AB ControlLogix PLCs 25
SCADA Issues Patchwork quilt of SCADA systems No City standards for hardware or software HMI differed for 3 different systems Increased risk of operator error 26
SCADA Challenges Very limited facility shutdowns Avoiding blind spots Old to new software Parallel programming Run simultaneously DOH required continuous monitoring Cutting ties to old RTUs 27
SCADA Improvements System redesigned from ground-up Standardized communication protocols Modbus, DeviceNet, Profibus and TCP/IP Transparency for troubleshooting Phased approach 1. Fiber optic backbone 2. PLC & RIO 3. Process control refinement 28
SCADA Network Architecture SLUDGE PRESS BACKWASH PUMPS ELEC/ GENERATOR BLDG SLUDGE PS RAPID MIX OPS BUILDING OPS LAB EAST HSP NORTH FILTERS CHEM GRAVITY THICK MID FILTERS WEST FILTERS EAST FILTERS AMMONIA WEST HS CHLORINE NORTH RAW 29
Chemical Dosing HMI 30
Plant Finished Water HMI 31
Remote Pump Station HMI 32
Improvements 2008 through 2015 Security upgrades Operational Improvements Staff training and certification Improved control Filter Upgrades Chemical Mixing & Metering SCADA System Primary power and distribution redundancy 33
Improvements through 2018 74 projects 60 of which are completed Source of supply Watershed protection Supply redundancy Operational Improvements Staff training and certification Security upgrades Treatment infrastructure improvements Process improvements Reliability projects Primary power redundancy Distribution safeguards and monitoring SCADA System 34
Summary WTP is now a safer facility though still not complete New electrical gear uninterrupted operation Delayed monitoring & manual operation replaced Process automatically monitored & controlled Met all WQ & Ops standards for the last 4 years 35
Questions? Architectural Rendering of Future Operations Building 36