RoQuest® 4000
Coagulant
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RoQuest® 4000 contains a blend of organic coagulants and ferric sulfate and is designed to be injected into the feedstream of multimedia and sand filters. This product will enhance the filter performance by further reducing turbidity and color, producing an effluent that is a more acceptable feedwater quality to downstream reverse osmosis systems.
Best results are achieved in raw waters that contain up to 10 NTU turbidity and color units of greater than 10 or in feedwaters in which organic polymers have been under or overdosed.
Performance:
RoQuest® 4000 provides unique performance and application benefits:
- Contains more than 8% soluble ferric ion and less than 0.2% ferrous ion.
- Certified by United Laboratories to ANSI/NSF 60 for use in systems producing potable water.
- Capable of producing RO quality feedwater in multimedia and sand filtration applications.
- Compatible with thinfilm (polyamide) and cellulose acetate RO membranes.
- Filter-aid properties resist solids breakthrough in direct filter applications.
- Low dosage requirements.
- Compatible with Vitec® 3000 scale inhibitor.
- Effective over a wide pH range.
Use Instructions:
Inject RoQuest® 4000 at least 15 feet (5m) upstream of multimedia filters. Do not use static mixers ahead of the filters as the shear imparted by this equipment will degrade the polymers contained in this formulation.
Dosing Guidelines:
Typical RoQuest® 4000 dosage is in the range of 2 to 25 ppm. Approximately 0.25 ppm of alkalinity expressed as calcium carbonate is required per ppm of RoQuest® 4000. Following coagulant addition, a minimum of 25 ppm of residual alkalinity is required.
Significant overdosing of RoQuest® 4000 may cause degradation in the quality of the filtered water. If there are any questions, please contact Avista Technologies for specific dosing instructions.
Dilution:
RoQuest® 4000 should be fed neat if possible. If a dilution is necessary, dilute no more than 4 to 1 with RO permeate or DI water.
Packaging:
Standard regional pack sizes are listed below. Custom packaging can be provided worldwide to meet customer needs. Information on drumless or bulk tanker delivery is available on request.
| Specifications |
| Appearance: |
Clear brown liquid |
| pH (1% solution): |
4.0 — 6.0 |
| Specific Gravity@20°C: |
1.3 — 1.4 |
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| Packaging Formats |
Americas |
EMEA |
| Pails |
45 lbs |
23 kg |
| Drums |
500 lbs |
220 kg |
| IBC's (tote bins) |
2500 lbs |
1100 kg |
|
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DRINKING WATER TREATMENT ADDITIVES CLASSIFIED BY NSF INTERNATIONAL TO NSF/ANSI 60 ON JUNE 2005 AS STANDARD DRINKING WATER TREATMENT CHEMICAL AT A MAXIMUM LEVEL OF 285 mg/l. |
10/08
