Examining the Impact of Air Emissions from Color Coating Operation

摘要

This paper is about the study on the applied air emission control technologies at the Color Coating Line of Union Galvasteel Corporation (UGC), located in Calamba, Laguna, Philippines. Presently, there are nine emission control technologies available in the market. Four technologies are recovery or removal by nature and these are Absorption, Adsorption, Condensation and Membrane Separation, and five technologies are of destructive nature and these are Biofiltration and Thermal Oxidation: Regenerative, Recuperative, Direct Flame, & Catalytic System. The air emission control technologies applied in UGC are Absorption by Wet Scrubber (AWS) and Adsorption thru Activated Carbon (AAC). AWS consists of four stations with corresponding blowers while AAC consists of pre filter, foam filter, activated carbon bed made from coconut shell, exhaust and booster blower. Test results showed the overall removal efficiency based on VOC = 97.50%, Carbon Monoxide = 98.76%, and Carbon Dioxide = 94.82%. Based on the evaluation, improvement on individual removal efficiencies were noted and further modifications will be considered in the project and developmental status. With the modifications to be accomplished, it is expected that the removal efficiencies will increase, the operating energy consumption will decrease, and ultimately the objective of controlling the air emission within the standard limit will be achieved.