Packed bed scrubbers are filled with structured packing. VOC gases contaminants are removed by gas absorption process by intimate gas-liquid contact. The scrubbing liquid is fed into the top of the scrubber column with gas flowing in counter current mode. As the liquid flows through the bed, it wets the packing material and provides interfacial surface area for mass transfer with the gas phase. On the packed bed scrubber, the scrubbing liquid (NaOH Solution 5 - 7% and NaOCl Solution 5 – 12%) wets the gas rising through the column making close contact with the down flowing liquid. The soluble gases and VOC are scrubbed from the mixture of gases by liquid. Caustic soda reacts directly with gases as the gas approaches the liquid interface. The support plate at the bottom of the packing bed is designed to have least resistance and maximum flow area and to have better distribution of gas across packing bed and draining liquid completely. The distributor mounted on top of the packed bed is designed to provide uniform wetting of the packing.