Water Science & Technology: Water Supply Vol 1 No 1 pp 51–61 © IWA Publishing 2001
Enhanced coagulation of surface waters with high organic content by
permangante preoxidation
J Ma*, GB Li**, ZL Chen***, GR Xu**** and GQ Cai*****
*
School of Municipal and Environmental Engineering,
Harbin University of Architecture and Engineering,
PO Box 627, Harbin 150090, PR China,
**
School of Municipal and Environmental Engineering,
Harbin University of Architecture and Engineering,
PO Box 627, Harbin 150090, PR China,
***
School of Municipal and Environmental Engineering,
Harbin University of Architecture and Engineering,
PO Box 627, Harbin 150090, PR China,
****
School of Municipal and Environmental Engineering,
Harbin University of Architecture and Engineering,
PO Box 627, Harbin 150090, PR China,
*****
Heilongjiang Electrical Power Company, Harbin 15001, PR China
ABSTRACT
Laboratory and full-scale experiments were conducted for enhancing the
coagulation of stabilised surface waters with high organic content by
permanganate preoxidation. It was indicated that permanganate preoxidation
enhanced both the processes of coagulation and filtration of selected
surface waters, River Songhua water, Qitaihe Reservoir water and Ba
Reservoir water. Permanganate preoxidation is especially effective for
enhancing the coagulation of very stable surface waters with relatively
high organic content. Experimental results showed that the manganese
dioxide produced in situ during permanganate preoxidation played an
important role in enhancing the coagulation and filtration processes. The
experimental results suggested that manganese dioxide may adsorb naturally
occurring organic materials through surface bonding to form bigger
particulates, thus increasing the floc density and improving the removal
of organic particulates and possibly the inorganic fine particles. Manganese
dioxide was shown to adsorb humic acid and enhance its removal by filtration.
Full article (PDF Format)
PAY-PER-VIEW: Buy this article for £20.00 (IWA MEMBER PRICE: £15.00)
|
