Non Contact UV

Commissioning, Startup and operation compared to horizontal, inclined or vertical systems

Presented by Arijit Sarkar, Application Manager, Enaqua Inc.

OVERVIEW OF PRESENTATION

Components and Footprint

• Weir constructions, building for electric, building for overhead crane

Commissioning/Installation

• Show different parts of the system (overview) Lamp racks, installation in the channel, overhead crane• (non contact: piped version and “in channel”)

Start up

• Level control, lamps, ballast, quartz sleeves to be installed, cable conduit

Operations & Maintenance

• Energy usage, Cleaning, level control, lamp change & usage

Disinfected wateror effluent out

Removable LampSupport Rack

AFP tubes to carry water

Water or effluent in

Thermostaticallycontrolled air

cooledUV lamps

Non-Contact UV SystemDry lamps

Contact System Submerged lamps 180°

Inclined and vertical (90 and 45°)

Important Lay-out parameters (In Channel)

3

7

5

8

14

6

2

1 UV Structure

2 Flow

3 Level Control

4 Crane/ Hoist

5 Lamp Racks

6 PDC

7 Control Panel, electrical panels

8 Hydraulic Control Unit, Mechanical cleaning device(s), air compressor, etc.

Foot Print- In Section View

Contact / Wet vs. Non Contact Dry

Footprint- Area

22.5’ (6.9 m)

19.8

’ (4.

5 m

)

333 ft2 (31 m2)53.5’ (16.3 m)

20.8

’ (6.

4 m

)

1112 ft2 (104 m2)

Non contact / DryContact / Wet

Installation- In Channel System

Quick, Simple and Efficient Installation of Enaqua’s prefabricated systems:

In-Channel open systems:1. True (continuous) Channels not

required2. UV reactor is shipped pre-assembled,

wired, tested, and ready for start-up from factory.

3. Lower and set UV reactor into Channel

4. Seal inlet and outlet orifice plates to concrete wall using gaskets provided

5. Install UV lamps, terminate power connections to UV reactor.

6. Power Up & UV reactor is ready for start-up and commissioning

“We have been happy and impressed with the level of support and technical backup support provided by Enaquaand its staff as and when we need it, and are happy to know Enaqua is only a phone call away.”

Plant operations Supervisor42 MGD WWTP

Installation- In Pipe System

Quick, Simple and Efficient Installation of Enaqua’s prefabricated systems :

In-Pipe closed systems:1. Place the UV reactor on slab, secure

reactor to slab.2. UV reactor is shipped pre-

assembled, wired, tested, and ready for start-up from factory.

3. Connect to process piping using flanges

4. Install UV lamps, terminate power connections to UV reactor.

5. Power Up & UV reactor is ready for start-up and commissioning

LOW FLOW

Energy savings/Opex

ENAQUA CONVENTIONAL

Required lamps are turned on/off Lamp banks are turned on/offor lamps are dimmed

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

ON orDimmed

OFF orDimmed

Energy savings/Opex

Required lamps and ballasts are turned on/off

HIGH FLOW

ENAQUA CONVENTIONAL

Lamp banks are turned on/offor lamps are dimmed

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

ON orDimmed

ON orDimmed

Opex- Scaling/Cleaning of Quartz based reactors

Opex- Bio Fouling

• Bio fouling typically occurs in between the UV Modules/Banks in a Channel

• Is a serious issue from both a maintenance and disinfection performance standpoint

• The biological growth if not cleaned regularly can affect the disinfection performance through particulate shielding

• Cleaning is a manual and labor intensive process

• Each channel needs to be isolated, taken offline, hosed off, scrubbed, then chemically treated

Scaling AFP Tubes vs. QuartzNon-Contact Traditional Quartz

Water chemistry and temperature High content of iron Iron, Manganese, Hardness, organic content

Interfacial temperature LOW HIGH

UV intensity _ _

Hydrodynamics TURBULENT PLUG FLOW TRADITIONALLY SAME VELOCITY AS CHANNEL

The quartz microstructure and topography N/A- AFP TUBE HAS SMOOTH CHEMICALLY INERT SURAFCE

HIGH

Opex-Wipers, Seals, Corrosion of Lamp Pins, Broken Sleeves, Leaking Seals

Comparison Contact UV - Vs. Non contact / Dry

Necessities Contact / Wet Non contact / Dry

Constant water levelin the channel

Weir Flow rate related water level

Lamps always on with every kind of water flow

Near constant energy usage

Only lamps related to water level are on

Cleaning Mechanism Continuously chemical and, or mechanical

Teflon brush- Manual cleaning once every 3-12 months.

“Building” for electricalballast/electronics

Required incl. temperature control

Built in reactor incl. temperature control

Specific channel requirements

Hydraulic flow distribution

Built into reactor

Summary/Conclusion

Comparison Criteria Enaqua’s Non-Contact UV*

Traditional Quartz Systems

Equipment Cost +/- 10% 100%

Construction Cost 30 – 80% 100%

Maintenance Hours 10% 100%

Energy Consumption 30 – 60% 100%

Chemical Usage 0 100%

Ancillary Equipment Requirements Teflon brush Flow Weirs, Baffle Plates, Hoists, and Cleaning

Mechanisms

*These values vary depending case by case. Comparative values presented are valid for large to medium sized installations when compared to horizontal and vertical systems.

Thank you so much for your attention

QUESTIONS OR COMMENTS