Bottom line is that it is sweet, toxic, chemically fairly stable and mildly flammable.
There is nothing you can treat it with at home that is not as toxic as the antifreeze itself. Antifreeze is not as volatile as gasoline or regular alcohol which means it won't blow up when ignited but it will burn. If you have a small spill, soaking it up with clay cat litter and landfilling the contaminated cat litter is probably the best bet. A larger spill should be handled by a professional. If it has soaked into the garage floor or driveway, the impacted area can be cleaned by adding something really unpleasant tasting such as lysol or other strong scented or bad flavored solution.