Polymer Dosage Control in Dissolved Air Flotation
Publication: Journal of Environmental Engineering
Volume 109, Issue 2
Abstract
Using a three‐cylinder batch unit with an incorporated dissolved oxygen probe, as well as a full‐scale continuous flow unit, for DAF tests, the relationship between polymer residual in the effluent and general performance was studied. A simple titrimetric procedure, sensitive to 1 mg/L, was used for residual polymer measurements, and the Zeta potential for the effluent solids was also obtained. It was found that below a polymer dose of about 4 mg/g of dry solids for the batch unit, there was no improvement in the thickening performance (or float solids concentration), that no residual polymer could be detected in the effluent, and that there was no effect on the negative Zeta potential. Above this dose, there was a step‐wise improvement in the thickening behavior, no further reduction in effluent SS, a detectable residual polymer, and a change to a positive value of the Zeta potential. A similar pattern was observed in full‐scale tests. Thus, it is suggested that polymer residual or Zeta potential measurements could be used for polymer dosage control. Both methods are quicker than the SS measurements, can differentiate between lack of polymer or another cause of performance deterioration, and show how much polymer overdosing had occurred.
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References
1.
Black, A. P., Birkner, F. B., and Morgan, J. J., “Destabilization of Dilute Clay Suspensions with Labelled Polymers,” Journal of the American Waterworks, Vol. 57, No. 12, 1965, pp. 1547–1560.
2.
Chao, A. C., and Keinath, T. M., “Influence of Process Loading Intensity on Sludge Clarification and Thickening Characteristics,” Water Research, Vol. 13, No. 12, 1979, pp. 1213–1223.
3.
Dixon, J. K., La Mer, V. K., Li, C., Messinger, S., and Linford, H. B., “Effect of the Structure of Cationic Polymers on the Flocculation and Electrophoretic Mobility of Crystalline Silica,” Journal of Colloid and Interface Science, Vol. 23, 1967, pp. 465–473.
4.
Eckenfelder, W. W., Jr., Rooney, T. F., Burger, T. B., and Gruspier, J. T., “Studies on Dissolved Air Flotation of Biological Sludges,” Biological Treatment of Sewage and Industrial Wastes, Vol. 2, Reinhold Publishing Co., New York, N.Y., J. McCabe and W. W. Eckenfelder, Jr., eds., 1958, pp. 251–259.
5.
Ettelt, G. A., “Activated Sludge Thickening by Dissolved Air Flotation,” Proceedings of the 19th Industrial Waste Conference, Purdue University, Lafayette Ind., Vol. 117, No. 1, 1964, pp. 210–244.
6.
Garrison, W. E., Stahl, J. F., and Tortorici, R. P. M., “Pilot‐Plant Studies of Waste Activated Sludge Processing,” Journal of the Water Pollution Control Federation, Vol. 50, No. 10, 1978, pp. 2374–2387.
7.
Gehr, R., and Henry, J. G., “The Adsorption Behaviour of Cationic Polyelectrolytes in Dissolved Air Flotation,” Water Science Technology, Vol. 14, 1982, pp. 689–704.
8.
Gehr, R., and Henry, J. G., “Assessing Flotation Behaviour of Different Types of Sewage Suspensions,” Progress in Water Technology, Vol. 12, No. 6, 1980, pp. 1–24.
9.
Gehr, R., and Henry, J. G., “Measuring and Predicting Flotation Performance,” Journal of the Water Pollution Control Federation, Vol. 50, No. 2, 1978, pp. 203–215.
10.
Habibian, M. T., and O'Melia, C. R., “Particles, Polymers and Performance in Filtration,” Journal of the Environmental Engineering Division, ASCE, Vol. 101, No. EE4, Aug., 1975, pp. 567–583.
11.
Henry, J. G., and Gehr, R., “Dissolved Air Flotation for Primary and Secondary Clarification,” Sewage Treatment and Collection Report SCAT‐9, Canada Mortgage and Housing Corporation, 1981.
12.
Katz, W. J., and Geinopolos, A., “Sludge Thickening by Dissolved Air Flotation,” Journal of the Water Pollution Control Federation, Vol. 39, No. 6, 1967, pp. 946–957.
13.
Komline, T. R., “Sludge Thickening by Dissolved Air Flotation in the U.S.A.,” paper presented at the Flotation for Water and Waste Treatment Conference, Water Research Centre, Felixstowe, England, June, 1976.
14.
La Mer, V. K., and Healy, T. W., “Adsorption‐Flocculation Reactions of Macromolecules at the Solid‐Liquid Interface,” Review of Pure and Applied Chemistry, Australia, Vol. 13, 1963, pp. 112–133.
15.
Lindquist, G. M., and Stratton, R. A., “The Role of Polyelecrrolyte Charge Density and Molecular Weight on the Adsorption and Flocculation of Colloidal Silica with Polyethylenimine,” Journal of Colloid Interface Science, Vol. 55, No. 1, 1976, pp. 45–59.
16.
Novak, J. T., and O'Brien, J. H., “Polymer Conditioning of Chemical Sludges,” Journal of the Water Pollution Control Federation, Vol. 47, No. 10, 1975, pp. 2397–2410.
17.
Pressman, M., “Cationic Polyelectrolytes as Prime Coagulants in Natural Water Treatment,” Journal of the American Waterworks Association, Vol. 59, No. 2, 1967, pp. 169–182.
18.
Riddick, T. M., “Zeta Potential and its Application to Difficult Waters,” Journal of the American Waterworks Association, Vol. 53, No. 8, 1961, pp. 1007–1030.
19.
Roberts, K. L., Weeter, D. W., and Ball, R. O., “Dissolved Air Flotation Performance,” Proceedings of the 33rd Industrial Waste Conference, Purdue University, Lafayette, Ind., 1978, pp. 194–199.
20.
Shannon, W. T., and Buisson, D. H., “Dissolved Air Flotation in Hot Water,” Water Research, Vol. 14, No. 7, 1980, pp. 759–765.
21.
Sludge Thickening, Manual of Practice No. FD1, Water Pollution Control Federation, 1980.
22.
“State‐of‐the‐Art of Coagulation,” Committee Report, Journal of the American Waterworks Association, Vol. 63, No. 2, 1971, pp. 99–108.
23.
Tenney, M. W., Echelberger, W. F., Schuessler, R. G., and Pavoni, J. L., “Algal Flocculation with Synthetic Organic Polyelectrolytes,” Applied Microbiology, Vol. 18, No. 6, 1969, pp. 965–971.
24.
Treweek, G. P., and Morgan, J. J., “Determination of Flocculant Effectiveness in Aggregating Suspended Particulate Matter,” Journal of the Water Pollution Control Federation, Vol. 51, No. 7, 1979, pp. 1859–1877.
25.
Vrablik, E. R., “Fundamental Principles of Dissolved Air Flotation of Industrial Wastes,” Proceedings of the 14th Industrial Waste Conference, Purdue University, Lafayette, Ind., Vol. 104, 1959, p. 743.
26.
Wang, L. K., and Shuster, W. W., “Polyelectrolyte Determination at Low Concentration,” Industrial Engineering Chemistry Product Research Development, Vol. 14, No. 4, 1975, pp. 312–314.
27.
Weber, W. J., Jr., Physicochemical Processes for Water Quality Control, Wiley‐Interscience, New York, N.Y., 1972, pp. 199–259, 559–563.
28.
Welday, J. M., and Baumann, E. R., “Polymer Characterization Based on Zeta Potential and Filtration Resistance,” Journal of the American Waterworks Association, Vol. 71, No. 12, 1979, pp. 726–732.
29.
Wood, R. F., and Dick, R. I., “Factors Influencing Batch Flotation Tests,” Journal of the Water Pollution Control Federation, Vol. 45, No. 2, 1973, pp. 304–315.
30.
Zeta‐Meter Manual, 2nd Ed., Zeta‐Meter Inc., New York, N.Y., 1968.
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Copyright © 1983 ASCE.
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Published online: Apr 1, 1983
Published in print: Apr 1983
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