dual starch-polyacrylamide polymer system for improved in netherlands

dual starch-polyacrylamide polymer system for improved in netherlands
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  • Is activated starch an alternative to polyacrylamide based polymers?
  • Activated starch as an alternative to polyacrylamide-based polymers for in-line filtration of low turbidity source water Dual starch–polyacrylamide polymer system for improved flocculation Water Res., 124 ( 2017), pp. 202 - 209, 10.1016/j.watres.2017.07.044 J. Environ.
  • Can activated starch polymer replace Pam during ballasted flocculation?
  • This study identified the conditions favorable to the use of an activated starch polymer as an alternative to PAM during ballasted flocculation: mixing intensity and time, coagulation pH, ballast size and chemical composition, and polymer charge density.
  • What is a starch–PAM system?
  • A starch–PAM system reduces PAM usage for conventional and ballasted flocculation. With 0.4 mg starch/L, PAM is reduced by 69% (surface water) and 45% (wastewater). With the dual system (G: 165-200 s −1 ), floc resistance is not impacted.
  • What is the difference between starch-based and Pam-based polymers?
  • Starch-based polymers have a more branched structure than the linear PAM configuration and hence have smaller chain lengths that reduce aggregation via interparticle bridging. Moreover, activated starch flocs have been shown to be more sensitive to shear than flocs produced with PAM ( Lapointe and Barbeau, 2015 ).