RO CHEMICALS BY TYPE – ANTISCALANTS

IWE AC2 Calcium Sulphate Antiscalant

IWE AC2 has been developed as an antiscalant for use in Reverse Osmosis and Nano-Filtration systems operating with feed-waters containing high levels of Calcium sulphate. IWE AC2 is also effective against Calcium carbonate and other commonly found scaling species. The strong threshold properties shown by IWE AC2 against Calcium sulphate and Calcium carbonate enable membrane systems to be operated at their optimum recovery rate. This reduces the amount of feed water needed and the volume of concentrate requiring disposal. Consequently, significant savings can be made with both capital and operational costs. 

Application

IWE AC2 should be dosed continuously to the feed water upstream of the cartridge filter. Typical dosage rates are 3-5mg/l. Under NSF listing the IWE AC2 dose rate in the feed water should be less than 5mg/l in potable water systems. IWE AC2 can be diluted and is fully miscible with water in all proportions.

Health and Safety

IWE AC2 is a non-hazardous, synergistic blend of phosphonates and carboxylic acids and is fully compatible with carbon steel and 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 2 years under normal storage conditions.

Typical properties

Appearance: pale clear liquid

pH as supplied: 8.3 – 8.7

Specific gravity: 1.31 – 1.33

Freezing point: -5ºC

• Suitable for Reverse Osmosis (RO) and NanoFiltration (NF) membranes
• Compatible with all polyamide membranes
• Replaces acid addition
• Allows high recovery rates
• Simple test method
• Inhibits common scales

– Barium/Strontium sulphate
– Calcium carbonate/sulphate
– Iron/Manganese
– Silica

• NSF listed

IWE AC3 Broad Spectrum Antiscalant and Antifoulant

IWE AC3 is a general purpose liquid antiscalant & antifoulant for use in Reverse Osmosis and Nano-filtration systems. This concentrated phosphonate product is effective against a wide range of inorganic scaling species and also sequesters trivalent metal cations such as iron, manganese and aluminium thus reducing the frequency of membrane replacement and cleaning.

IWE AC3 has proven to be effective at a Langelier Saturation Index (LSI) of +2.6 which means that systems can be designed and operated at their optimum recovery rates.

By reducing the amount of feed water used and concentrate to be discharged, significant savings can be made to both capital and operational costs.

Application

IWE AC3 should be dosed continuously to the feed water upstream of the cartridge filters. Typical dosage rates are 2 – 4 mg/L.

IWE AC3 may also be used in sea water applications where iron is present, recycle of brine is in use or there is no feed water pH reduction by acid dosing.

Typical dose rates are 0.5 – 1.0 mg/L

Under NSF listing the IWE AC3 dose rate in the feed water should be less than 5 mg/L in potable water systems.

IWE AC3 can be diluted and is fully miscible with water in all proportions.

Health and Safety

IWE AC3 is an aqueous solution of neutralised phosphonic acid. It has been approved for use in potable water applications and does not contribute to assimilable organic carbon (AOC), which can act as source of nutrient for micro-organisms. IWE AC3 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 2 years under normal storage conditions.

Typical properties

Appearance: straw coloured liquid

pH as supplied: 9.8 – 10.2

Specific gravity: 1.34 – 1.37

Freezing point: < -15°C

• Suitable for Reverse Osmosis (RO) and Nano- Filtration (NF) membranes

• Effective at LSI up to +2.6

• Excellent inhibitor for iron fouling

• Excellent silica antiscalant

• NSF listed product

• Approved for use in drinking water applications (UKDWI)

• Compatible with all types of polyamide membrane

• Replaces acid addition

• Inhibits common scales

– Calcium carbonate/sulphate

– Calcium phosphate

– Barium/Strontium sulphate

– Silica

– Iron/Manganese

IWE AC4 Broad Spectrum Antiscalant

IWE AC4 has been developed as a broad spectrum antiscalant for use in brackish water Reverse Osmosis and NanoFiltration systems. It is highly effective at preventing the formation of inorganic scale thereby reducing the frequency of membrane cleaning and replacement. IWE AC4 allows systems to be designed and operated at their optimum recovery rates, reducing the amount of feed water used and concentrate to be discharged. Consequently significant savings can be made with both capital and operational costs.

Application

IWE AC4 should be dosed continuously to the feed water upstream of the cartridge filters. Typical dosage rates are 4-8 mg/l. IWE AC4 can be diluted and is fully miscible with water in all proportions.

Health and Safety

IWE AC4 is an aqueous solution of neutralised phosphonic acid that has been classified as safe to use in potable water applications. IWE AC4 is compatible with carbon steel and all commonly used materials of construction. A material safety data sheet is available on request.

Packaging

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

IWE AC4 shelf life is two years under normal conditions of storage

Typical properties

Appearance: pale coloured liquid

pH as supplied: 9.7 – 10.3

Specific gravity: 1.13 – 1.15

Freezing point: <-2ºC

• Suitable for use in Reverse Osmosis (RO) and NanoFiltration (NF) membranes 9
• Excellent iron fouling inhibitor
• Compatible with all polyamide membranes
• Allows high recovery rates
• Drinking water approval
• Negligible impact on AOC levels
• Replaces acid addition
• Inhibits common scales

Calcium carbonate/sulphate

Barium/strontium sulphate

Silica

Calcium phosphate

Iron & manganese

IWE AC5 Calcium Phosphate Antiscalant

IWE AC5 has been developed specifically to prevent calcium phosphate and calcium carbonate scaling in Reverse Osmosis and NanoFiltration systems. IWE AC5 permits system operation at higher pH and recovery than other antiscalants; thus reducing the amount of feed water, reject water disposal and acid for pH control needed, resulting in significant capital and operational cost savings.

Application

IWE AC5 should be dosed continuously to the feed water upstream of the cartridge filter. The dose rate of IWE AC5 is dependent on the calcium and phosphate content of the concentrate stream, as well as pH, temperature and ionic strength. We will be pleased to provide advice on the most suitable dose rate for a particular water analysis and set of operating conditions. IWE AC5 can be diluted and is fully miscible with water in all proportions.

Health and Safety

IWE AC5 is a non-hazardous, synergistic blend of phosphonates and carboxylic acids, compatible with carbon steel and other commonly used materials of construction. 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.

Typical properties

Appearance: pale clear liquid

pH as supplied: 6.0 – 6.4

Specific gravity: 1.14 – 1.16

• Suitable for Reverse Osmosis (RO) and NanoFiltration (NF) membranes
• Replaces acid addition
• Compatible with all types of polyamide membranes
• Allows high recovery rates
• Simple Test Method
• Inhibits common scales

– Calcium carbonate/sulphate
– Barium/Strontium sulphate
– Calcium phosphate
– Silica

IWE AC6 Antiscalant for Recycle Systems

IWE AC6 has been developed as a broad spectrum antiscalant and antifoulant for use in small and recycling Reverse Osmosis and Nano-Filtration systems with less than 100 m3 /day of feed water flow. IWE AC6 is effective at preventing all inorganic scale formation thus reducing the frequency of membrane cleaning and replacement. IWE AC6 allows systems to be designed and operated at higher recovery rates. By reducing the amount of feed water needed and concentrate for disposal, capital and operational cost savings can be made.

Application

IWE AC6 should be dosed continuously to the feed water upstream of the cartridge filter. Typical dosage rates are 7 – 15mg/l. IWE AC6 can be diluted and is fully miscible with water in all proportions.

Health and Safety

IWE AC6 is a synergistic blend of neutralised carboxylic and phosphonic acids whose active components have been classified as non-toxic and are widely used in drinking water applications. IWE AC6 is compatible with carbon steel and all 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 2 years under normal conditions of storage

Typical properties

Appearance: pale liquid

pH as supplied: 10.7 – 11.3

Specific gravity: 1.08 – 1.12

Freezing point: < -0°C

• Suitable for Reverse Osmosis (RO) and Nano-Filtration (NF) membranes
• Compatible with all types of polyamide membranes
• Allows high recovery rates
• Replaces acid addition
• Simple test method
• Inhibits common scales

– Calcium carbonate/sulphate
– Barium/Strontium sulphate
– Calcium phosphate
– Magnesium hydroxide
– Iron/Manganese