Hardman polyaluminium chloride products offer many advantages for pulp and paper manufacture. Their range of applications extends from process water and effluent treatment to paper making processes. The effectiveness of PAC compared to traditional coagulants like alum means that good results can be seen, even a low dosage levels. In papermaking operations, Hardman PAC is useful as a fixative to control anionic substances and as a retention / drainage aid.

The benefits of Hardman PAC in papermaking applications are:-

• Superior control of anionic substances in the furnish.

• Minimisation of deposits in critical areas of the machine due to pitch, stickies etc.

• Simple management of the wet end chemistry.

• Improved filler and fines retention.

• Improved paper quality.

• Improved drainage and machine speed.

• Reduction in downtime due to improved runnability.

• Provides a powerful two part system in conjunction with high molecular weight

• polymers for retention and for save-all operations.

• Reduction in the use of other wet end additives such as size chemicals, retention

• polymers and starch.

• Contributes less acidity to the mill water because it has been pre-hydrolysed.

• Can be used with calcium carbonate fillers and neutral size additives because of

• the higher pH conditions in which it functions.

• A more rapid formation of the alumina species than alum is achieved - important

• in high speed operations.

• Does not contain sulphate ion and consequently eliminates a potential discharge

• problem from this source.

• Reduces the discharged load to the wastewater treatment plant.

Beneficial in the wastewater treatment process as a single or multi- component system for improved water quality, sludge handling and nutrient removal in clarification, flotation and sludge de-watering systems and the like.

Also very effective for coagulation of difficult coloured substances and chromophores that contaminate the effluent from pulp mill bleaching operations.

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