Efficacy of Chitosan and Other Natural Polymers in Removing Cod, TSS, HeavyMetals and PAHs from Municipal Wastewater at Deer Island, Massachusetts

摘要

A series of tests was conducted at the Deer Island Primary Treatment Plant duringthe spring and summer of 1992 to determine the efficacy of chitosan and other natural polymers as coagulants, coagulant aids and flocculents in wastewater treatment. Prior to this undertaking, as part of the MIT 'Investigation of Chemically Enhanced Primary Treatment at the MWRA Project,' the efficacy of metal salts and synthetic polymers had been studied at Deer Island. Those tests provided the standard against which to measure the viability of natural polymer use in municipal wastewater treatment. The major conclusions of the chitosan and other natural polymers study for Deer Island wastewater are included.