Containing the sulfur is removed by adsorption on the regeneration catalyst reactor NaOH NaOH addition also gives substance to come out of the regeneration catalyst which is acidic to neutral. Then be forwarded to the KMnO4 to smell.
There are sulfur out so the adsorption regeneration catalyst that reactor NaOH besides NaOH also help make substance out. Regeneration catalyst which is acidic to neutral, then be forwarded to the KMnO4 to deodorize