Instead Alum Use Poly Aluminium Chloride Coagulant
6. Lower doses are required to give equivalent results to alum. 7. The increase in chloride in the treated water is much lower than the sulphate increase from alum, resulting in lower overall increases in the TDS of the treated water. PAC=PACl. Note: a) .the cost of Poly Aluminium Chloride is twice/thrice of Alum ( roughly the cost of PAC-0.4 Kg)
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