Water Science & Technology: Water Supply Vol 1 No 2 pp 251–258 © IWA Publishing 2001
Effect of pulp mill chemicals on flocculation in river water
S Young* and DW Smith**
*
Environmental Engineering Program, Department of Civil and Environmental
Engineering, 304 Environmental Engineering Building, University of
Alberta, Edmonton, AB T6G 2M8, Canada
**
Environmental Engineering Program, Department of Civil and Environmental
Engineering, 304 Environmental Engineering Building, University of
Alberta, Edmonton, AB T6G 2M8, Canada
ABSTRACT
Thousands of pulp mill chemicals have been released into the aquatic
environment. Some of them may cause flocculation and deposition of an
organic matrix and incoming suspended sediments downstream of pulp mills
in rivers, and may have adverse impacts on aquatic ecosystems. Therefore,
it is important to identify the chemicals inducing coagulation and
flocculation in river water. This assists in understanding the mechanism
for its formation, and will improve the transport models by including the
effect of flocculation. Presented is the effect of pulp mill effluent
related cationic ions and organic polymers on flocculation in river
water. The experimental results show that Na+, Ca2+,
fibers, hydrolytic lignin, protein, sucrose, cellulose and starch can
induce flocculation in river water.
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