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  • Do poly aluminum chloride and poly ferric sulfate affect was digestion?
  • Poly aluminum chloride (PAC) and poly ferric sulfate (PFS) are widely used in wastewater treatment and sludge dewatering, resulting in their amounts being accumulated substantially in waste activated sludge (WAS). Till now, however, little information about their influence on WAS digestion is available.
  • Is poly ferric aluminum chloride a good coagulant?
  • Lan et al. suggested that poly ferric aluminum chloride (PFAC) not only possessed a good coagulation performance, but also had good stability during storage in comparison to PFS and FeCl 3. Furthermore, P.A. Moussas focused on the synthesis of new composite coagulants PFS–PAA, which constituted both inorganic and organic materials.
  • What is poly aluminum-ferric chloride (PAFC)?
  • See Materials (Basel). 2022 April 25; 15 (9): 3104. Poly aluminum-ferric Chloride (PAFC) is a new type of high efficiency coagulant. In this study, high iron type gangue is used as a main raw material. It is calcined at 675 °C for 1 h and 3% CaF 2 is added to the calcined powder and reacted with 20% hydrochloric acid at 93 °C for 4 h.
  • Why is Pac better than aluminum sulfate?
  • The PAC has advantages over aluminum sulfate in the purification process such as: reduction in the coagulant doses, effective behavior in a wider pH range of raw water; higher sedimentation rate of the flocs produced, which increases the filtration runs, reduction of the coagulation helper [28, 31].