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Copyright
2009 Nalco Company
6-5
Technical Help
(630) 305-CHEM
3D TRASAR
5500 - Installation & Operation Manual
6.3
Bio-Reporter Selection
The bio-reporter product comes in both liquid and pellet form. Before starting up 3D TRASAR Bio-
Control, refer to the table below to make sure you are using the appropriate product.
!
Important!
3DTBR10 is formulated in concentrated sulfuric acid. Please contact your
Nalco Representative for recommendations on fluid handling equipment compatible with
concentrated acid.
6.4
3D TRASAR Bio-Control/3D TRASAR Bio-Shock Start-Up
Procedure
We recommend running a system under ORP control with a control range of
±
20mV for a week
before proceeding to 3D TRASAR Bio-Control. The ORP readings during this period should be
evaluated. If the ORP readings swing much wider than the control band of
±
20mV then the entire
oxidant feed system should be evaluated. Common reasons for poor ORP control include:
•
The Oxidizing biocide pump is air locking
•
The Oxidizing biocide is entering the system in front of the intake for the controller
•
The Oxidizing biocide is being fed into a dead leg or a potential dead leg (e.g. Makeup water
tank)
•
The oxidizing biocide pump rate is set too high or too low
•
The system does not recirculate properly.
Oxidant feed issues should be resolved prior to 3D TRASAR Bio-Control initiation.
STEP 1
- Turn off oxidant feed to allow cooling system residual to fall below 0.1 ppm TRH
(Depending on system volume this can take as long as 24 hours). Measure the total halogen
residual with a DR/2800 or DR/890 DPD test (
Reagent P/N 460-S0461.87
).
STEP 2
- Verify BioReporter and oxidant feed systems are ready for service. DO NOT feed the
oxidant and BioReporter in close physical proximity. Make sure both feed points are sufficiently
separated in distance that thorough mixing of each occurs. Failure to do so will negatively impact
the performance of 3D TRASAR Bio-Control. Do not feed bio-reporter or Oxidizing biocide directly
upstream of the 3D TRASAR controller sample point.
Bio-Reporter
Product
Bio-Reporter
Type
Recommended
System Volume
Gallons
"Do not Exceed"
System Volume
Gallons
Blowdown
Upper Limit GPM
3DTBR06
Liquid (0.6%)
0-12,000
30,000
N/A
3DTBR8
Solid pellet (8%)
12,000 to 30,000
100,000
200
3DTBR20
Solid pellet (20%)
30,000 to 60,000
1,000,000
500
3DTBR40
Solid pellet (40%)
60,000 to 2,000,000
2,000,000*
1,000
3DTBR10
Liquid (10%)
>5,000,000
N/A
N/A
