1,109. How to Destroy Chometz
Chometz u’Matzah 3:10
Let’s say that someone puts rolled dough aside in his home, then goes out and only remembers it after he has left. If he is sitting before his teacher and he worries that the dough will rise before he gets back, he may nullify it in his heart before it rises. However, if it has already risen, nullifying it will not be effective because he has already violated the prohibition against possessing chometz. The dough must then be destroyed immediately upon returning home.
Chometz u’Matzah 3:11
Chometz may be destroyed by burning it, crumbling it and tossing it to the wind or throwing it into the sea. If the chometz is so hard that the sea will not dissolve it quickly, one should crumble it before throwing it into the water. If other things fall on chometz so that it is covered by three handbreadths or more of dirt (about nine inches), it is considered as already destroyed, though one must still nullify it in his heart if the sixth hour of the day has not yet arrived. If a Jew gives chometz to a non-Jew before the sixth hour, he need not destroy it. If one burns his chometz before the sixth hour, he is permitted on Passover to use the charcoal that forms. If he burns it from the sixth hour and on, benefit may not be derived from it so it may not be used as fuel for baking or cooking. If one did bake or cook with it, it is forbidden to benefit from what he made. It is likewise prohibited to use the charcoal that forms from this chometz because it was burned after benefiting from it was already prohibited.