GridBee®

THM Removal Systems

The EPA Stage 2 Disinfectants and Disinfection Byproducts rule with locational maximums for TTHM (80 ug/l) has resulted in compliance pressure for many cities. Mixing alone may not lower the THM concentration enough to comply. For these systems, Medora Corporation has developed an effective and economical floating spray nozzle system for THM removal in tanks and clearwells.

THMs enter the tankwhile it is �lling.

Floating Spray Nozzle THM RemovalSystem picks up the new water as fast as it comes in, and treats it throughthe spray nozzles. The entire tank is mixed thoroughly. The system can be left on year-round, at full speed or reduced speed, to prevent ice damagein cold climates.

Headspace:Two feet minimumoperating height; four feet duringinstallation.

Blower pushes air into tank.

Spray nozzles

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Floating Spray Nozzle THM Removal System

Features and Benefits of the Floating Spray Nozzle THM Removal System• Four machine sizes, 3 hp, 5 hp, 10 hp, and 15 hp provide for scalable systems for clearwells and tanks from

10,000 to 100,000,000 gallons, and tank flow rates up to 100,000,000 gallons per day• There are no significant friction or lifting losses, so 98% of the energy consumed by the pump is converted to

stripping TTHM at the nozzle assembly, compared to less-efficient fixed-ceiling nozzle designs• Patented long-life nozzle and intake treat all incoming water, minimize THM formation downstream• Nozzle angle assures no damage to tank coatings• Ventilation blowers for headspace included with all systems• All models fit through a 24" x 24" or larger hatch opening, eliminating the need to install a new larger hatch

or special lifting equipment• No infrastructure piping is required, and no modifications to the tank or clearwell other than small access

openings for electrical cable and the headspace air ventilation• Factory installation is available for entire system except the wiring by the local electrician• Small-footprint units are easily movable and removable for any future interior tank work• If the TTHM problem changes, this equipment is portable and can easily be moved to another area of town

or sold to another water district• Low-maintenance, long-life design• Two year parts and labor warranty; factory maintenance plans available• Full-scale pilot studies can be provided, with purchase options

Medora Corporation's potable water products are certified to NSF/ANSI Standard 61, and NSF/ANSI 372 for lead-free content. Learn more at www.medoraco.com/std61.

Medora Corporation3225 Hwy 22 • Dickinson, ND 58601

Ph +1 866 437 8076 • www.medoraco.comTHMremoval_20150318 • © 2015 Medora Corporation

Model  SN3 Model  SN5 Model  SN10 Model  SN15

Unique  Features

Flow  through  nozzles,  MGD 0.25  MGD 0.33  MGD 0.66  MGD 1.0  MGDPossible  reduction  of  TTHM,  each  

pass  through  nozzles35%  to  70% 35%  to  70% 35%  to  70% 35%  to  70%

Spray  pump  horsepower  and  motor  electrical  options

3HP/230V/1PH/1.15  S.F.3HP/230V/3PH/1.15  S.F.3HP/460V/3PH/1.15  S.F.

5HP/230V/1PH/1.15  S.F.5HP/230V/3PH/1.15  S.F.5HP/460V/3PH/1.15  S.F.

10HP/230V/3PH/1.15  S.F.10HP/460V/3PH/1.15  S.F.

15HP/230V/3PH/1.15  S.F.15HP/460V/3PH/1.15  S.F.

Dimensions

Unit  Weight

Hatch  size  required

Head  space  required

Water  depth  required

Machine  Diameter

Ventilation  Blower  (included)

Ventilation  Blower  horsepowerand  motor  electrical  options

Ventilation  blower  mounting

Low  Energy  Tank  mixing  system

Installation  Consdiderations

Electrical  requirementsfor  the  owner  to  provide

If  have  power  source  limitationsa  VFD  may  be  recommended

A  power  source,  conduit  and  NEMA  combination  starter  /  disconnect  per  electrical  code  to  each  pump  motor,  each  blower  and  each  low  energy  mixer  as  listed  in  the  THM  system  proposal

 Variable  frequency  drive  (VFD)  may  be  desired  to  providea  conversion  from  

230V/1ph  power  source  to  a  230-­‐460V/3PH  power  source

 Variable  frequency  drive  (VFD)  may  be  desired  to  providea  conversion  from  

115V/1ph  power  source  to  a  230V/3PH  power  source  or  230V/1ph  power  source  to  a  230-­‐460V/3PH  power  source

Little  or  no  infrastructure  changes  needed,  no  need  to  drain  the  tank,  no  need  for  diver(s),  factory  installation  available,  tank  owner  to  provide  electrical  service  and  connections

 GS-­‐series  submersible  mixer(s)  may  be  included  in  a  THM  system  proposal  for  mixing  due  to  tank  inflow  rate,  for  low  energy  mixing  when  the  THM  system  is  off,  or  for  ice  considerations

Pre-­‐designed  •  Pre-­‐packaged  •  Portable  •  Reliable  •  Long  Life  •  No  need  for  diver(s)  or  to  drain  the  tank  •  Fits  through  most  standard  size  hatches    Full  written  specifications  available  upon  request.

Working  dimension:    8  ft  diameter  x  5  ft  tall,  plus  draft  hose Working  dimension:    10  ft  diameter  x  6  ft  tall,  plus  draft  hose

Typically  on  top  of  the  tank  or  clearwell

2HP/230V/1PH/1.15  S.F.2HP/230V/3PH/1.15  S.F.2HP/460V/3PH/1.15  S.F.

Approx.  8  feet Approx.  10  feet

Approx.  60  inches

Approx.  300  lbs Approx.  500  lbs

Minimum  18  inches  clear  unobstructed  diameter Minimum  24  inches  clear  unobstructed  diameter

Minimum  18  inches  working  height,  Minimum  4  feet  temporarily  during  installation

Minimum  24  inches  working  height,  Minimum  4  feet  temporarily  during  installation

2HP/230V/1PH/1.15  S.F.2HP/230V/3PH/1.15  S.F.2HP/460V/3PH/1.15  S.F.

750  CFM   750  CFM  per  blower  (Multiple  blowers  may  be  required)

Approx.  54  inches

Specifications

Locally Represented By:

GridBee®

are brands of Medora Corporationand

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