An environment is moderated in an area where animal wastes are collected in a fluid containing compartment. Animal wastes are collected in a fluid containing compartment. The animal wastes are of the type that generate or provide in or above the fluid containing compartment at least one waste selected from the group consisting of carbon dioxide, hydrogen sulfide, ammonia, mercaptans and organic acids. A combination is provided of i) a polymer capable of absorbing at least ten times its weight in water (preferably a superpolymer) and ii) a combination of salts that react to liberate I2. At least one waste is flocculated with liberated I2 (and any cations from the reactive salts) to form a flocculent that has reduced odor and reduced microbial content. The flocculent may be used as a fertilizer.