Poly Aluminium Chloride

Poly Aluminium ChloridePAC 18 (Poly Aluminium Chloride) is based on highly charged aluminium which results in lower dosage and therefore reduces sludge volume and pH adjustment demand. It also improves solids and/or phosphorous removal over conventional coagulants.

PolyAluminium Chloride is the product of the batch reaction between solid Aluminium Hydroxide (AL(OH)3) and liquid Hydrochloric acid (HCI). Aln(OH)mCl3n-m


Aluminium hydroxide is fed into the reactor containing sulphuric acid and hydrochloric acid.

The solution obtained is neutralised with calcium carbonate resulting in a mixture of PAC solution and gypsum crystals.

The gypsum crystals are filtered and separated from the slurry.

Gypsum thus obtained can be used for the purposes of gypsum boards, cement etc, after being washed with water.

8Al(OH)3+2H2SO4 + 10HCl + CaCO3 ——> Al8(OH)12(SO4) Cl10 + CO2 +


PAC 18%: mid-basicity liquid PAC, containing 17,5 ± 0,5% Al2O3, specific for wastewaters and neutral sizing in papermaking. It is used as a primary coagulant aid for any clarifying/flocculation process relating to the treatment of surface or underground water and urban or industrial effluents.


Product Benefits

  • Superior quality polyaluminium chloride (PAC)
  • Highly efficient coagulant
  • Low generation of waste sludge
  • Versatile, can be used in a wide range of applications


To learn more about Flocculation -> Visit Here

To learn more about Coagulation -> Visit Here

Removal of Suspended Solids and COD
You coagulate and flocculate effluent to remove the suspended solids from wastewater at the end of a manufacturing process. The coagulant changes the electrical charge of the suspended solids so they start to attract each other to form small particles. Flocculation brings these small particles together to form flocs, using mechanical processes (eg DAF) these flocs can be made to either rise or fall to allow them to be removed from the wastewater. Once these suspended solids and the COD values associated with them are removed, the clean effluent can then be let to sewer, potentially saving your company thousands of pounds annually in trade effluent charges.

free effluent treatment plant survey

GPC Clear Solutions will conduct laboratory testing and onsite trials with our extensive range of silicone and non-silicone based antifoams to make sure we select the correct antifoam product for your operation.For more information on our products or to improve plant performance, fill in our enquiry form.


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