assessment of polyacrylamide and aluminum sulphate coagulants

assessment of polyacrylamide and aluminum sulphate coagulants
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  • Can polyacrylamide be used as a coagulant aid?
  • Polyacrylamide has been demonstrated to be very successful as a coagulant aid with PACl at doses as high as 10 mg/L for low and intermediate initial turbidity levels (not more than 25 NTU). Furthermore, the polyacrylamide shows better performance in removing turbidity at high ranges of turbidity at various concentrations.
  • Can polyacrylamide and Walnut coat be used as coagulants?
  • With both polyacrylamide and walnut coat as coagulants, better sludge properties were obtained, with low water content and high density that can be readily dried and disposed of. Keywords: ferric chloride; PACl; alum; walnut coat; and polyacrylamide
  • Does polyacrylamide coagulant reduce turbidity?
  • Figure 18 shows the correlation between the natural coagulant with PACl and synthetic coagulant with PACl. It is found that at 22.8 NTU of raw water turbidity, the results indicate a reduction in turbidity to 1.67, 0.52, 0.95, and 0.15 NTU with using polyacrylamide with PACl.
  • Do aluminum coagulants cause worse coagulation performance in alkaline condition?
  • coagulation. This behavior breaks the conventional knowledge that aluminum coagulants usually present worse coagulation performances in alkaline condition. 97.3%.