The coagulants and flocculants were added in the following
concentrations to produce the flocculated biomass: ferric chloride
– 100 mg/l + Sibfloc-718–15 mg/l, Superfloc C-492 25 mg/l,
Sibfloc-718 15 mg/l, ferric chloride 50 mg/l + Sibfloc-718 7.5 mg/l.
The material was stirred at 200 rpm during 1 min before it was left
to settle for 5 min at room temperature, and then stirred again and
added to make 5%, 10%, 15% by volume of the native biomass
The coagulants and flocculants were added in the followingconcentrations to produce the flocculated biomass: ferric chloride– 100 mg/l + Sibfloc-718–15 mg/l, Superfloc C-492 25 mg/l,Sibfloc-718 15 mg/l, ferric chloride 50 mg/l + Sibfloc-718 7.5 mg/l.The material was stirred at 200 rpm during 1 min before it was leftto settle for 5 min at room temperature, and then stirred again andadded to make 5%, 10%, 15% by volume of the native biomass
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