PRECAST CONCRETE. Never Looked So Good!

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2 GARY JERAL NON-CONTACT UV DISINFECTION vs. TRADITIONAL CONTACT UV SYSTEMS OVERVIEW PERFORMANCE & MAINTENANCE ISSUES

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4 WHAT ARE THE CHARACTERISTICS EXPERIENCED WITH STANDARD UV SYSTEMS (QUARTZ SLEEVES) DIFFICULTY TO MAINTAIN AND KEEP CLEAN - PERFORMANCE EXPENSIVE TO OPERATE AND MAINTAIN ENERGY COSTS TIME CONSUMING & MESSY WET LAMP, QUARTZ SLEEVE & SEAL CHANGES NEED TO BY-PASS SYSTEM FOR MAINTANENCE EXPENSIVE REPLACEMENT PARTS CLEANING REQUIREMENTS MANUAL, MECHANICAL DEVICES & ACID WASHING STATIONS

5 Contact UV Systems require: Flow control gates & leveling weirs Quartz sleeves, seals to protect the lamp Lamps are submerged in the effluent Hoists- to remove wet lamp racks Mechanical cleaning devise, wipers, air scrubbers Chemicals and acid cleaning tanks Has to be installed in-channel

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30 UV MADE SIMPLE

31 FEATURES AT A GLANCE Electrical Panel Ensure Dosing System (EDS) Flow & Level Pacing Individually fused and switched Lamp Racks Heat Exchange System Single Lamp Ballast Open discharge UV Intensity Monitor

32 Water flows through proprietary Activated Fluropolymer Tubes (AFP840 ). UV lamps surround these tubes outside the flow of water (DRY) Each tube gets exposed to ultraviolet light from all sides. UV reflecting alloys form the outer casing. Unabsorbed ultraviolet light is reflected and absorbed by the water

33 Non-Contact versus Traditional Contact UV Technology Reactor Configuration Contact UV reactor configuration. UV Lamps Flow in Flow out Front view Non - Contact UV reactor configuration. UV Lamps Flow in Flow out Front view Flow tubes Flow in Side view Flow out

34 Technologies in Comparison AFP TM NON-CONTACT TECHNOLOGY QUARTZ SLEEVE UV TRADITIONAL CONTACT TECHNOLOGY mj/cm 2 Low cost high output lamps No quartz sleeves Fouling-resistant AFP tube Turbulent flow provides self-cleaning of AFP tube No AFP tube replacement under normal conditions Simple pipe hydraulics makes UV disinfection easy to predict No level control devices required High cost amalgam lamps Fragile quartz sleeves with risk of mercury and glass contamination Fouling-prone quartz sleeves Cleaning system required Quartz sleeves need to be replaced over time Channel hydraulics makes UV disinfection less predictable Level control devices increase footprint

35 AFP stands for Activated Fluoropolymer specifically developed for Non-Contact UV applications: High transmission of UV light Fouling resistant smooth surface Robust, flexible, fracture resistant material No deterioration Chemically stable Proven over 20+ years of continuous operation

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38 AFP Tube Inside Lamps Outside Flow

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41 Lamp Rack Assembly PRECAST CONCRETE

42 MAINTENANCE MADE FAST, EASY, DRY NO MORE: Costly amalgam lamps Dirty and fouled quartz sleeves Problems with quartz cleaning devices Interruption of flow Removal of hydraulic seals Heavy duty hoists required for maintenance Time consuming lamp replacements Algae growth on the lamp racks Quartz sleeves to break and replace* *No AFP tube replacement under normal conditions (20+ year history) Non-Contact UV Traditional Contact UV

43 Inefficient Power Savings Methodology- Lamp always ON

44 Only the lamps required are turned on. And YES, we can disinfect this water

45 Only the lamps required are turned on.

46 Only the lamps required are turned on.

47 Enaqua s Flow & Level Pacing is always the most energy efficient system! - No matter what the flow -

48 Non-Contact versus Traditional Contact Technology: City of Burlington, WA, USA

49 Unique Flow & Level Pacing system only turns on lamps required to do the job Improved lamp life Improved ballast life Reduces power consumption compared to dimming systems Flow & Level Pacing Annual Energy Cost Comparison $ 13,346 Enaqua EDS $ 34,528 Traditional Dimming Systems Actual comparison of bid guaranteed UV energy costs for Wastewater Plant, Peak 28MGD, Average 6MGD, $0.10/kWh.

50 POSITION IN CHANNEL, SEAL FLANGES TO WALLS CONNECT POWER

51 POSITION IN CHANNEL, SEAL FLANGES TO WALLS CONNECT POWER

52 POSITION IN CHANNEL, SEAL FLANGES TO WALLS CONNECT POWER

53 POSITION IN CHANNEL, SEAL FLANGES TO WALLS CONNECT POWER

54 POSITION IN CHANNEL, SEAL FLANGES TO WALLS CONNECT POWER

55 LOCATE ON PAD OR FLAT SURFACE, CONNECT FLANGES CONNECT POWER

56 LOCATE ON PAD OR FLAT SURFACE, CONNECT FLANGES CONNECT POWER

57 LOCATE ON PAD OR FLAT SURFACE, CONNECT FLANGES CONNECT POWER

58 C-Series (2) Units 1 MGD Each

59 LOCATE ON PAD OR FLAT SURFACE, CONNECT FLANGES CONNECT POWER

60 M-3 Series 80 GPM UV System

61 M-4 Series 120 GPM Each UV System

62 LAGOONS ARE PUMPED, FILTERED, TREATED WITH UV AND USED FOR AGRICULTURE AND GREEN SPACE IRRIGATION

63 4 Lagoons L/s Pumps to micron filters GPM Non-Contact UV Reactors Discharge into 45,000 gal tank Automated- Runs Unattended at Night Discharge Permit: 22 MPN/100ml TSS: 10mg/l BOD: 10mg/l FIRST MUNICIPAL REUSE SYSTEM IN ILLINOIS NON DISCHAGING PLANT

64 1. PROJECT IN TEXAS- REPLACE CHLORINE DISINFECTION WITH UV DISINFECTION 2. CLIENT PROVIDED DRAWINGS OF EXISTING CHLORINE CONTACT CHAMBER 3. ENAQUA EVALUATED THE DRAWINGS FOR: 1. Hydraulic Limitations (Hydraulic Profile, Piping, etc.) 2. Dimensions and layout constraints 4. AT CLIENTS REQUEST- PROPOSED TWO ALTERNATIVE LAYOUT FOR UV REACTORS A. In Pipe reactors B. In channel reactors 5. CLIENT OPTED FOR THE IN-PIPE INSTALLATION 6. INCORPORATED ENAQUA S REACTORS IN THE DESIGN OF THE RETROFIT

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70 DETERMINE IF NON-CONTACT UV IS EFFECTIVE AND PRACITCAL FOR DISINFECTING LOW UVT EFFLUENT Flow: 0.5 MGD Model: C3t.06061S UVT: 20-50% TSS: mg/l Turb: 5-74 NTU Source: Clarifier Duration: 12/3/12 to 4/24/13 Manager Wastewater Services Larri Curry Engineering Review Veenstra & Kimm

71 MORE TO THE SYSTEM THAN PRICE Key cost factors:- Capital:- Minimal difference Power consumption:- Minimal difference at peak flow, significant difference at Average Daily and Low Flows. Replacement parts (lamps, ballasts, wipers and sleeves):- AFP TM 840 systems have an on-going replacement cost up to 50-60% lower than contact systems, due to the elimination of quartz sleeves, lamp control and robust self syncing ballasts (power range volts).

72 Predictable plug flow = easy system sizing and performance calculations No flow levelling weirs or barriers required Less design worry System operation and control directly interfaces with plant SCADA Fewer components in system to design around Can be installed in-channel or slab mounted

73 Lamp racks can be removed without draining or interrupting flow Lamp racks can be lifted by hand no lifting equipment required. Dry lamp rack removal = quickest lamp change-out on the market (1 minute per lamp). No quartz sleeves to clean No danger of Mercury or quartz contamination from breakage No hydraulic seals to deal with All serviceable components on lamp rack No mechanical cleaning device, no chemical cleaning

74 Lower total installed cost than Contact UV Systems. Lower power consumption during Average Daily flows (real life operation) Lower O&M costs over life of system (fewer consumable replacement parts) Most components are locally available or from multiple sourceslowering replacement costs

75 Key Benefits True plug flow High UV exposure Low fouling and virtually self cleaning Easy lamp replacement Controlled optimal lamp temperature No mercury / glass contact Modular tubular design Low whole-of-life cost

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