Dear Madam, In my knowledge, ...

Dear Madam, In my knowledge, Aeration is normally not used for about more than 2.0 mg/l H2S concentration. As the water from well is going to be used for drinking purpose and the nearby soil contains anaerobic bacteria, the best way to remove H2S may be chlorine dosing with activated carbon filter before its consumption. ONLY IF WATER HAS NO SIGNIFICANT AMOUNT OF IRON. Considering 4.0 mg/l of H2S concentration, you will need 8.0 mg/l of chlorine dosing with approximately 20 minutes of retention time. In the given retention time chlorine will oxidize H2S where as the activated carbon filter will removes the insoluble sulphide particles as well as residual chlorine left after the oxidization of the H2S. Best Regards, Sameer Dohare