If you simply make sure that the effluent is well aerated, the sulfur dioxide can be oxidized by air to sulfate. This only works if the sulfur dioxide
is very dilute and the pH is not too low.
Another method is to use an ozonator. This could be very effective, because the small amounts of nitric oxides produced as a byproduct by the ozonator
can help catalyze the oxidation of sulfite by air.
Quote: Originally posted by gsd ![](images/xpblue/lastpost.gif) | In my experience, the best (and the cheapest) oxidising agent for SO2 is Manganese Dioxide in the form of Pyrolusite ore |
bad idea, then the effluent would be contaminated with manganese. even worse
[Edited on 22-9-2013 by AndersHoveland] |