(1) mixing 100kg carbon source contg. 20-40% moisture and steamed 200kg colloid type protein-contg. 60-80% moisture; (2) adding microbiology for digesting into the obtd. mixt. and digesting at room temp. for 36hrs.; and (3) collecting amino acid percolate from the digested mixt. to obtain the amino acid and the fertilizer from the residue.
