pfs solid poly ferric sulfate/pac 30% /high efficiency in russia

pfs solid poly ferric sulfate/pac 30% /high efficiency in russia
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  • What is poly ferric sulfate (PFS)?
  • Poly ferric sulfate (PFS) with the general formula of [Fe2 (OH) n (SO4)3-n/2] m (n < 2, m > 10) is a relatively new kind of inorganic coagulant. It has been reported by several researchers that it e...
  • Why are PFS coagulants better than ferric sulphate?
  • Therefore, as the PFS coagulants consist mainly of polymeric species, they exhibit better coagulation behaviour. It is worth noting that for a 90% removal efficiency, only 20 mg/l of PFS are required, whereas the respective dosage of ferric sulphate in this case is much higher, i.e. 30 mg/l.
  • Does poly ferric sulfate affect methane production?
  • Poly ferric sulfate (PFS), one of the typical inorganic flocculants widely used in wastewater management and waste activated sludge (WAS) dewatering, could be accumulated in WAS and inevitably entered in anaerobic digestion system at high levels. However, knowledge about its impact on methane production is virtually absent.
  • Does iron-equivalent ferric sulfate inhibit PFS?
  • Compared to PFS, the iron-equivalent ferric sulfate showed less inhibition (11.1% versus 32.0%), and this gap might be ascribed to the “hydroxyl polymers” to some extent.