Activated Carbon Filters

Our Activated Carbon Filter has a mild steel pressure vessel that has external valves for controlling the flow of water during treatment process. The media of our Activated Carbon Filter has layers of crushed gravel and graded pebbles. An inlet distributor is equipped in it that directs the inflow of raw water upwards towards the top-dished end. Then the filtered water goes through bottom collecting system that controls the assists in the cleaning of the filter.

We provide the Activated Carbon Filters that have their internal surface painted with anticorrosive paint or epoxy based paint. Flow indicators are given as optional extras for controlling and measuring flow of water. Pressure Gauges are also provided at the inlet and outlet. An orifice board is fitted in the drain for controlling flows. Our Activated Carbon Filter effectively chlorinates water for removing organic impurities.

Activated carbon can remove and destroy residual disinfectants (chlorine and chloramine) through a catalytic reduction reaction. This is a chemical reaction that involves a transfer of electrons from the activated carbon surface to the residual disinfectant. In other words, activated carbon acts as a reducing agent.

Activated carbon’s removal of chlorine reduces the chlorine to a non-oxidative chloride ion. The reaction is very fast and takes place in the first few inches of a new activated carbon bed. The chlorine capacity of new activated carbon is 1 pound of chlorine per pound of carbon at a flow rate of 3 to 5 gpm/cu.ft. and a bed depth of 3 feet.

Chloramine removal by activated carbon is a much slower reaction. The predominant species of chloramine in city water supplies (pH about 7 to 8) is monochloramine. The reaction with activated carbon and monochloramine also renders a non-oxidative chloride ion. Since the rate of reaction is considerably slower, the flow rate should be 0.5 gpm/cu.ft. and the bed depth greater than 3 feet.