Fireants are the worst pest here in SE Texas. First, get a bottle of Parsons Household ammonia. When you get stung, IMMEDIATELY scrub the bites with ammonia for 15-20 seconds, then wash it off. The bites won't sting, blister, or itch. To organically treat the mounds, this recipe is from Bob Randall, Ph.D., author of "Year Round Vegetables, Fruits and Flowers for Metro Houston".
Mix 1 gal water, 1 Tbsp molasses, a sqeeze of liquid dish soap, and 3/4 cup citrus oil. If you can dig up the mound, put as much of it as you can in an empty 5-gal bucket, squeeze dish soap over it, and fill it with water from the hose. Then spread the citrus oil solution over the area where the mound was, and dig it in as well as you can with a garden fork. If you can't dig up the mound, pour the citrus oil mix over it and dig it in as well as possible. some ants may survive and make smaller mounds nearby, so you'll have to keep at it for a while.
This will keep poison out of your compost. None of the poisons work worth a crap, anyway.
Madfarmer