Method for dewatering of sludge

摘要: A chemical method is provided for the dewatering of biological sludge that has been digested by a thermophilic digestion process. Five versions are presented. The primary component in five polyquaternary amine, preferably di-allyl di-methyl ammonium chloride (DADMAC) variety and from epichlorohydrin amine (epi-DMA) variety. By first method, added directly, along with polyacrylamide, to sludge. second an anionic polyacrylamide separately. third quaternized having as part its polymer chain, produced copolymerization acrylamide monomers quaternization individually fourth three concert cationic fifth aluminum sulfate, ferric blends thereof added,