continuous low dosing of cationic polyacrylamide (pam) in netherlands

continuous low dosing of cationic polyacrylamide (pam) in netherlands
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  • Does cationic polyacrylamide reduce algal removal in a high rate algal pond?
  • This study investigated the effect of a continuous low dosing of cationic polyacrylamide (PAM) to achieve efficient algal removal from a 1-ha High Rate Algal Pond (HRAP) treating domestic wastewater in New Zealand. Firstly, standard jar tests were conducted in laboratory conditions.
  • Is polyacrylamide a cationic or inorganic salt?
  • ABSTRACT Cationic polymers (e.g. polyacrylamide) having a high molecular weight require a much lower dose than inorganic metal salts (e.g. AlCl3, FeCl3, or Al2 (SO4)3) to produce dense compact flocs… Polyacrylamide (PAM) is generally employed in wastewater treatment processes such as sludge dewatering and therefore exists in the sludge.
  • What is a high molecular weight polyacrylamide (PAM)?
  • ... High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.
  • What is the Pam dose rate?
  • Based on the best result of the standard jar tests in the laboratory, the PAM dose rate was initially set at 4 mg/L for 14 days (from 7 to 20 August 2017) and the PAM dose was then reduced to 2 mg/L (174 ml/min) during the next 7 days (from 21 to 27 August 2017) to test the effect of the reduced PAM dose on the removal of algal solids and E. coli.