INALUM is very concerned with the pollution control to avoid the impact from the operation of the smelter. A big investment has been made for environmental management of its activity, especially for emission control system as an integral part of the operation of Smelter.

The smelter is equipped with Gas Cleaning System to avoid the pollution caused by exhaust gas including fluoride and dust from reduction plant as well as SOx and tar from Anode Baking Plant. It also has 27 units of dry scrubbing connected to the three pot lines. For treatment of gas emission, alumina is sprayed into the gas stream which contains fluoride. Almost all fluoride in the gas reacts with alumina and becomes absorbed by it. The fluoride enriched alumina and other particulate matters are then returned to smelter pots while the cleaned gas is discharged through a chimney. In addition to its benefit to the environment, this recovery and recycling of fluoride also result in significant saving and almost offset the cost of running the Dry Scrubbing System.

The company applies R3 concept, reduction, Recovery, and Recycling. All materials involved, from raw materials to final product can be recycled in production process.

The company also keeps monitoring the pollutants at smelter area as well as at its surrounding. The monitoring is regularly made on fluoride emission in the air, plants and soil and also on SOx in the air. Water quality has been also being monitored meticulously.

    

Gas Cleaning System (Left) &  Sewage Station(Right)

    

Waste Water Treatment Plant  (Left) & Water Sampling at Surrounding Area (Right