ENERGY EFFICIENT UV UPGRADE AT THE ARROWHEAD RANCH WRF

Transcription

1 21 March 2012 ENERGY EFFICIENT UV UPGRADE AT THE ARROWHEAD RANCH WRF GARY HUNTER, ANDY MALLY BLACK & VEATCH WATER ARIF RAHMAN, LARRY BROUTMAN, SHUANG HUANG CITY OF GLENDALE

2 AGENDA Introduction Project Funding and Purpose Facility Overview Existing Trojan 4000 UV Project Overview Selection Process Status and Challenges 2

3 PROJECT OVERVIEW ARWRF UV Replacement Energy Efficiency Upgrade from Medium Pressure UV to Low Pressure High Output UV Disinfection 3

4 PROJECT FUNDING AND PURPOSE Department of Energy Energy Efficiency and Conservation Block Grant (EECBG) Davis-Bacon Act Wage Rates American Recovery and Reinvestment Act (ARRA) Buy-American Competitive Selection Reduce Energy Consumption Associated w/ Disinfection 4

5 PROJECT FUNDING AND PURPOSE Primary Objectives Continuous Permit Compliance Improved UV system efficiency Reduced energy consumption Reduced O&M costs Increased UV system reliability 5

6 FACILITY OVERVIEW Arrowhead Ranch Water Reclamation Facility Originally constructed in 1983 Rated Capacity of 4.5 mgd Traditional Activated Sludge Treatment Dynasand Filtration Trojan 4000 UV Disinfection 6

7 Emergency Lagoons Admin Building Aeration Basins Exist UV Modules Exist UV Ballasts Headworks Tertiary Filters 7

8 PROJECT OVERVIEW 8

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10 PROJECT OVERVIEW Existing Trojan 4000 UV Reliability issues High power cost Maintenance intensive Design Criteria Q avg = 4.5 mgd Transmittance = 55% 144 Lamps Permit Limits 4 of 7 Non-Detect 23 MPN/100 ml single sample max 10

11 PROJECT OVERVIEW General Plant Process Biological process is prone to upsets Rectangular secondary clarifiers are in need of rehabilitation and are extremely shallow allowing solids breakthrough Tertiary filters underperform Effluent Turbidity regularly exceeds 1 NTU Mean Particle Size may regularly exceeds 30 micron limit 11

12 Number of Days above Dectection per year INCONSISTENT COMPLIANCE WITH DISINFECTION REQUIREMENTS 24 February Year 12

13 UV EQUIPMENT SELECTION PROCESS 1. Establish Energy Efficiency Goals 2. Establish Treatment Goals 3. Establish Design Criteria 4. Establish Experience Guidelines 5. Prepare Front End Documents and Specifications 6. Advertise and Select Manufacturer 13

14 UV EQUIPMENT SELECTION PROCESS Establish Energy Efficiency Goals Reduce power costs Existing UV System Power ~$125,000/year estimated based on operation of 50 percent of the system $350,000/year full power all banks/lamp in service Power monitoring In place to fully quantify Expected savings ~$60,000/year minimum 14

15 MAY- JUNE RESULTS 15

16 POWER MONITORING RESULTS MONITOR 1 16

17 POWER MONITORING RESULTS MONITOR B&V PPT Template Presentation 24 February

18 POWER MONITORING DATA MONITOR 3 18

19 POWER MONITORING DATA MONITOR 4 19

20 AVERAGE MONITORING RESULTS KW-H Test Period 5/9/11 to 6/9/11 Module KW (avg. Operating from data) % KW/day (avg.) Avg. KW- H/Day DP215, Bank 1A % DP217, Bank 1B % DP216, Bank 1C % DP218, Bank 1D % Total Demand Days in period 30 Total Avg. KW- H/Day Estimated cost $ 183,525 Lamps/Module 36 KW/Lamp 2.8 Total Bank KW Total # of Banks 4 Total Load

21 UV EQUIPMENT SELECTION PROCESS Establish Treatment Goals Meet permit limits Establish Design Criteria Flow, Avg = 4.5 mgd, Peak = 9.0 mgd UVT = 65% Dose = 120 mj/cm 2 Other Considerations Filtration issues Supplemental chlorination 21

22 UVT, % UV EQUIPMENT SELECTION PROCESS Average UVT = 70.43% Average UVT = 71.43% Current Design UVT = 55% Historical

23 UV EQUIPMENT SELECTION PROCESS Establish Experience Guidelines >5 years of operational systems California DPH Conditional Acceptance Federal ARRA Buy-American Prepare Front End Documents and Specifications Advertise and Select Manufacturer 23

24 UV EQUIPMENT SELECTION PROCESS Manufacturers Considered Trojan UV 3000Plus Wedeco TAK55 IDI/Ozonia Aquaray 3X HO 24

25 STATUS Equipment Vendor Selected Trojan For Construction Documents Prepared and Project has Advertised for Contractor Bids New Facility with all equipment enclosed Shop drawings finalized and delivery date for UV equipment established 25

26 Existing Electrical Building Existing Cl 2 Storage Existing UV/Chlorine Contact Basin To Be Demolished Abandoned Traveling Bridge Filters Existing Dynasand Filters New UV Building Existing Maintenance Building Existing Storage Area 26

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28 NEXT STEPS Rehabilitate or Replace Secondary Clarifiers Repair Aeration Headers and Improve DO Control Replace Filters with more Robust Technology

29 SUMMARY Funding Available for Energy Efficient Projects Upstream process will have impact Power monitoring Can see the light

30 Questions??

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