RO CHEMICALS BY TYPE – FLOCCULANTS

To minimise membrane fouling and reduce cleaning frequency the silt density index (SDI) should be kept as low as possible. IWE FL2 can be used to improve the performance of filtration equipment and has been developed as a general-purpose flocculant for use in surface, well and process waters with medium to high SDI values. IWE FL2 is compatible with polyamide membranes and does not foul membranes like conventional iron and aluminium based coagulants. 

Application

IWE FL2 should be dosed continuously to the feed water allowing at least 5 minutes contact time before filtration. Dose rate can be optimised by on site jar testing and SDI analysis. Typical dose rate of IWE FL2 is 1- 4 mg/L. IWE FL2 can be diluted and is fully miscible with water in all proportions.

Health and Safety

IWE FL2 is an aqueous solution of a polyquaternary amine. It is compatible with carbon steel and other commonly used materials of construction. Observe all safety precautions shown in the material safety data sheet, available on request.

Packaging

Available as 25 ltr keg, 250 ltr drum or 1000 ltr IBC.

The shelf life is two years under normal storage conditions. IWE FL2 is a viscous liquid at low temperatures.

Typical properties

Appearance: pale liquid

pH as supplied: 5.0 – 7.0

Specific gravity: 1.03 – 1.05

Freezing point: -2°C

• Improves the performance of filtration equipment
• Effective against a wide range of particulate matter
• Compatible with polyamide membranes
• Reduces plant cleaning frequency

IWE FL3 is used to improve the performance of filtration equipment. It has been developed as a general purpose (low molecular weight) flocculant for use in surface, well and process waters of medium to high SDI. IWE FL3 conforms to European Standard EN 1408: 1998 “Chemicals used for treatment of water intended for human consumption – polyDADMAC”. Other flocculants from the IWE product range are available as required. 

Application

IWE FL3 can be diluted and is fully miscible with water in all proportions. IWE FL3 should be dosed continuously to the feed water, (at a turbulent location to ensure good mixing) allowing at least five minutes contact time before filtration. IWE FL3 can often reduce and sometimes eliminate the need for the prior addition of inorganic coagulants such as aluminium sulphate, ferric sulphate, etc. Typical dose rate of IWE FL3 is 2 – 5 mg/L.

Health and Safety

IWE FL3 is an aqueous solution of a cationic homopolymer. It is mildly corrosive to carbon steel so recommended materials for storage tanks etc. include stainless steel, fibre glass, polyethylene and polypropylene. A material safety data sheet is available on request.

Classification

CHIP: Not Classified | UN: Non Hazardous

Packaging

Available as 25 ltr keg, 250 ltr drum or 1000 ltr IBC.

The shelf life is two years under normal storage conditions. IWE FL3 is a viscous liquid at low temperatures.

Typical properties

Appearance: clear pale liquid

pH as supplied: 5.5 – 7.5

Specific gravity: 1.02 – 1.04

Freezing point: 2°C

• Improves the performance of filtration equipment
• Effective against a wide range of particulate matter
• Stable to degradation by chlorine
• Effective over a wide pH range
• Liquid product, easy to use
• Approved for use in potable water applications
• NSF Listing