Biological preparation and application of poly-ferric sulfate flocculant

摘要: Abstract A novel inorganic polymer flocculant, poly-ferric sulfate (BPFS) was prepared by oxidation of ferrous using domestic Thiobacillus ferrooxidans ( T·f ) under acid condition. The optimal conditions for the preparation were pH value 1.5, (NH 4 2 SO dosage 0.5 g/L, initial Fe 2+ concentration 45g/L, inoculum 10%, rotating speed 120 r/min, reaction time 5-6 d and temperature 30 °C. Under conditions, BPFS product with 1.5-2.2, basicity 17.5%-22.7% total iron content 43.87-45.24 g/L obtained. application to three wastewaters carried out, removal efficiencies COD, decolorization Zn can be reached 70%, 90% 99%, respectively. result suggests that is an excellent flocculant water treatment.