Publication Detail

MIT Jar Tests of the Natural Polymer Chitosan with Fresh Pond Water from the Cambridge Water Department: November - December, 1992

Susan Murcott, Donald Harleman
1993
40 pp.
MITSG 93-22

A natural organic polymer, chitosan may provide an alternative to the use of alum or other inorganic metal salts as a coagulant in water treatment. Chitosan is abundant, biodegradable, and non- toxic. This paper reports results of jar tests with samples from the Cambridge, Massachusetts water department, comparing the performances of chitosan, alum, and other coagulants with regard to turbidity, color, pH and alkalinity. Comparisons with tests conducted by others are included, along with equations for evaluating sludge production and estimating relative costs of alum versus chitosan plus bentonite at the Cambridge Water Treatment Plan.

type: Technical reports

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