By William A. Foster (auth.), Norbert M. Bikales (eds.)
Water-soluble polymers were attracting expanding atten tion due to their software in commercial purposes of significant present difficulty. possibly preeminent between those is their skill to flocculate suspended solids, e.g., wastes in municipal stitch age-treatment vegetation or pulp in papermaking. different very important appli cations are to help in so-called secondary restoration of petroleum, to lessen turbulent friction of water, and as elements of water-based finishes built in accordance with environmental con straints. a few water-soluble polymers have proven attention-grabbing bio common sense task, that is being investigated extra. This e-book relies on papers awarded at a symposium held via the yank Chemical Society, department of natural Coatings and Plastics Chemistry, in long island urban on 30-31 August 1972. the big attendance and the favorable reaction of the viewers con firmed not just our view of the significance of the sector but in addition the necessity to deliver those subject matters jointly. The chapters during this ebook are more often than not enlarged and extra specified, with extra whole bibliographies, than the papers provided on the Symposium. They contain not just the $64000 purposes defined above, but in addition descriptions of recent syntheses and characterization methods.
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Extra info for Water-Soluble Polymers: Proceedings of a Symposium held by the American Chemical Society, Division of Organic Coatings and Plastics Chemistry, in New York City on August 30–31, 1972
Treatment plants only 0-15% of the phosphate is removed from the waste water via the primary sedimentation basin. The removal of 80% phosphate has been accomplished in conventional primary treatment with the application of inorganiC chemicals (lime, iron salts, or aluminum salts) and synthetic organic polyelectrolytes. To obtain phosphate removal (Figure 4), the inorganic chemical is applied as a dilute solution 1-10% solids) to the raw waste water just as it enters the plant. This addition point must provide sufficient contact time (2-10 min) for the inorganic chemical to precipitate the phosphate.
18. H. C. Brill and F. L. Hecklau, Tappi, 43 (4), 229A (1960). 19. H. , Atlanta, June, 1972, p. 31- 20. W. Brecht, E. Maier, and W. Volk, Das Papier, 18 (7), 298 (1964). 21. R. P. Whitney et aI, in N. M. , Encyclopedia of Polymer Science and Technology, Interscience Publishers, New York, Vol. 9, 1968, pp. 714-747. F. Linke, Tappi, 51 (11), 59A (1968). APPLICATION OF POLYELECTROLYTES IN MUNICIPAL WASTE TREATMENT Howard G. Flock and Emerson G. Rausch Calgon Corporation Pittsburgh, Pennsylvania WASTE TREATMENT Raw municipal waste water consists of domestic sewage alone or a combination of domestic sewage, industrial waste and/or storm sewer run-off that contains five major pollutants: suspended solids, organic matter, phosphate compounds, nitrogen compounds, and pathogenic organisms.
FLOCK AND EMERSON G. RAUSCH increase the flotation of activated sludge solids. 6% solids with the application of an M':jMTMlI'lS copolymers. From the above reported studies, it can be concluded that cationic polyelectrolytes by themselves can significantly improve the degree of solids separation achieved by the dissolved air flotation of waste activated sludge and sludge blends containing a higher ratio of waste activated sludge to primary sludge. Elutriation This process was originally developed for the chemical reduction of lime and ferric chloride dosages when applied to the vacuum filtration of digested sludge.