A method of treating animal manure solids comprises contacting the solids with
a treatment composition comprising AlCl3.nH2O or Al(NO3)3.mH2O,
or the residue of AlCl3.nH2O or Al(NO3)3.mH2O,
to form a treated waste product, wherein n is from 0 to 10, and m is from 0 to
12. The treatment amount can be effective to reduce phosphorus solubility in the
manure; reduce phosphorus runoff and/or phosphorus leaching from fields fertilized
with manure; inhibit ammonia volatilization from the manure; flocculate solids
in the manure; reduce pathogens in the manure; increase the nitrogen content in
the manure; and/or reduce acid rain and PM-10s associated with the manure.
