Q. See question above. If one is indeed complying with the mitzva of Biur Chometz, when eating chometz or drinking beer or chometz liquors, although one does not recite a brocho, should not one at least have the intention necessary to comply with all the available possible biblical positive mitzvos?
A. Whether one complies with the mitzva of Biur Chometz when eating it, is subject to the opinion of different Poskim.
Rashash (Psochim 21b) maintains that one who eats chometz or feeds it to animals indeed complies with this mitzva, and adds that even according to Rav Yehuda that the destruction of the chometz has to be done by burning, the natural heat process involved in digestion is similar, as the Pasuk teaches “a human is alike the the tree of the field”. (See Piskei Teshuvos 445: 2, p.423) . See also prior answer.
Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller Horav, Chanoch Ehrentreu and Horav Kalman Ochs Shlit'a