In early stage of the study, different flocculants were tested
individually. It was the goal of that stage to pick out the more
efficient flocculants for further experimentation using coagulant
and flocculant mixtures, and with flocculated biomass used as ballast
agent. From the experiments, it was found for non-ionic
Superfloc N-300 (Fig. 2a) and anionic Superfloc A-100 (Fig. 2b) flocculants
used, that the flocculation efficiency both was of them
close to the control experiment. Our study has shown that the
PEO-based cationic flocculant Sibfloc-718 has similar efficiency to
that of the PAA cationic flocculant Superfloc C-492. Thus, sedimentation
efficiency of about 80% was achieved in 120 min for both
flocculants. However, note that the efficiency, over 5 min of sedimentation,
for Sibfloc-718 of 15 mg/l concentration (Fig. 2d) was
50%, whereas in Superfloc C-492 case at 25 mg/l concentration
(Fig. 2c) it was 40%.
In early stage of the study, different flocculants were testedindividually. It was the goal of that stage to pick out the moreefficient flocculants for further experimentation using coagulantand flocculant mixtures, and with flocculated biomass used as ballastagent. From the experiments, it was found for non-ionicSuperfloc N-300 (Fig. 2a) and anionic Superfloc A-100 (Fig. 2b) flocculantsused, that the flocculation efficiency both was of themclose to the control experiment. Our study has shown that thePEO-based cationic flocculant Sibfloc-718 has similar efficiency tothat of the PAA cationic flocculant Superfloc C-492. Thus, sedimentationefficiency of about 80% was achieved in 120 min for bothflocculants. However, note that the efficiency, over 5 min of sedimentation,for Sibfloc-718 of 15 mg/l concentration (Fig. 2d) was50%, whereas in Superfloc C-492 case at 25 mg/l concentration(Fig. 2c) it was 40%.
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