WIT Press


Improvements To The Dewaterability Of Ferric Sludge Produced From Chemical Treatment Of Wastewaters

Price

Free (open access)

Paper DOI

10.2495/WP970711

Volume

20

Pages

10

Published

1997

Size

615 kb

Author(s)

A.A. Latifoglu, G. Suriicii & M. Evirgen

Abstract

Ferric chloride is an effective coagulant for the removal of suspended solids and appreciable amount of Chemical Oxygen Demand (COD) in sewage. Treatment of sewage by ferric chloride produced highly voluminous sludge which was resistant to dewatenng process. Lime improves dewatering of ferric sludge by reducing specific resistance and increasing the compressibility characteristic of sludge depending on the dosage of conditioners Flyash was also concluded as an effective conditioner due to a decrease in the specific resistance of sludge On the other hand, addition of flyash decreased the compressibility coefficient of sludge 1 Intr

Keywords