Different Metamorphic Degree Of Coal Microbial Flocculation Research

Currently, organic polymer flocculant and inorganic flocculant are the major flocculanting mathes to be used in the coal preparation plant, which accounted for a larger proportion is polyacrylamide,polyacrylamide is widely used yet acrylamide with strong induced toxicity. In previous studies, on the basis of a single coal slurry flocculation, carry out different metamorphic degree of coal slime water of biological flocculation, study different metamorphic degree of coal slurry flocculation properties, biological flocculation with polyacrylamide flocculant slime water have great importance to economic and environmental significanceThis paper choose which have good flocculation of fungi of P.C. in coal slime water treatment. Design single factor experiment, adopt the method of nonlinear regression to create slurry pH dosing quantity, coagulant aid, biological flocculant dosing quantity with slime water light transmittance, the mathematical model between facters and different metamorphic degree of coal slime water level range. Using the orthogonal experiment design P.C. flocculation experiment, P.C. flocculant different metamorphic degree of coal slurry flocculation effect is the best process parameter combination. P.C. and polyacrylamide compound with flocculation experiment was carried out, looking for P.C. and polyacrylamide compound with enhanced different metamorphic degree of coal slurry flocculation effect combination.Experimental results show that:1) the single factor experiment showed that1#(meager coal) slurry flocculation best level for slurry pH value is6, coagulant aid dosing quantity:2.0ml, flocculant dosing quantity:1.5ml;2#(gas coal)slurry flocculation best level for the slurry pH value of7, coagulant aid dosing quantity:3.0ml, flocculant dosing quantity:2.0ml;3#(coking coal) slurry flocculation best level for the slurry pH value of7, coagulant aid dosing quantity:1.0ml, flocculant dosing quantity:3.0ml.2) P.C. flocculation slime water orthogonal experiment show that the flocculation1#(meagre coal) slime water microbial incubation time:2d, dosage of coagulant aid:3ml,microbial quantity:1ml, PH value for7transmittance is49.7%; Flocculation2#(gas coal) slime water microbial incubation time:2d, dosage of coagulant aid:2ml, microbial quantity:3ml, PH value is6light transmittance was71%; Flocculation of3 #(coking coal) slurry microbial incubation time:2d, dosage of coagulant aid:3ml, microbial quantity:3ml, PH value is8light transmittance was59.2%.3) P.C. flocculation slurry with polyacrylamide to orthogonal experiment show that the flocculation1#(meagre coal) slime water test, the optimal factor combination of polyacrylamide as0.1ml, bacterium fluid:lml, dosage of coagulant aid:3ml, slurry pH value is5light transmittance was89.8%;2#(gas coal) slurry flocculation experiment, the optimal factor combination of polyacrylamide as0.1ml, bacterium fluid:1ml, dosage of coagulant aid:2ml, slime water pH value of6when the light transmittance was93.5%;3#(coking coal) slime water test, the optimal factor combination of polyacrylamide as0.1ml, bacterium fluid:lml, dosage of coagulant aid:3ml, slime water pH value of7when the light transmittance of88.5%.Through the analysis of the sugar biological flocculating agent, protein analysis; Biological flocculating agent crude extracts of FTIR measurement, scanning electron microscopy (sem) analysis and XRD composition analysis; Dry coal slime XRD composition analysis; The research of scanning electron microscopy (sem) before and after the coal slurry flocculation floc;And the observation of flocculation process; Reveal the biological flocculation mechanism of the flocculating agent is electrical neutralization and swept volume, the trap together with the physical and chemical process, such as P.C. flocs solid slurry flocculation flocculant solution not easily, is one of the advantages of biological flocculating agent, but the floc sedimentation speed is slow, polyacrylamide flocculant flocculation of coal slime water body fragile but sedimentation rate soon.