Lenntech <!-- PLUGIN:LANGUAGE:water_treatment_and_purification --> Lenntech <!-- PLUGIN:LANGUAGE:water_treatment_and_purification -->

Desalination Pretreatment: Dechlorination

Dechlorination ca be processed by 2 processes:
  • Addition of Sodium (meta) bisulfite (SBS)

The dosing rate is 3:1 of SBS:Cl2 (active chlorine dose). The reaction time is about 2 minutes.

NaHSO3 + Cl2 +H2O --> NaHSO4 + 2 HCl

Na2S2O5 + Cl2 +H20 --> Na2SO4 +SO2 + 2HCl

Chemisorption process where chlorine reacts with the carbon surface.

CL2 --> Cl-

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