Differences in the flocculation mechanism ofKluyveromyces marxianus andSaccharomyces cerevisiae

1992 ◽  
Vol 14 (3) ◽  
pp. 213-218 ◽  
Author(s):  
M. J. Sousa ◽  
J. A. Teixeira ◽  
M. Mota
Keyword(s):  
Flocculation Mechanism

scholarly journals Flocculation of a High-Turbidity Kaolin Suspension Using Hydrophobic Modified Quaternary Ammonium Salt Polyacrylamide

Processes ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 108 ◽  
Author(s):  
Jiangya Ma ◽  
Xue Fu ◽  
Wei Xia ◽  
Kun Fu ◽  
Yi Liao
Keyword(s):  
Solid Content ◽  
Experimental Simulation ◽  
Illumination Time ◽  
Flocculation Mechanism ◽  
Synthesis Conditions ◽  
Optimum Synthesis ◽  
Dimethyl Ammonium ◽  
Stirring Time ◽  
High Turbidity ◽  
Method Show

In this work, a novel cationic polyacrylamide (PAMD) was synthesized by acrylamide (AM) diallyl dimethyl ammonium chloride (DMD) and dodecyl polyglucoside (DPL) under low-pressure ultraviolet (UV) initiation. The intrinsic viscosity and cationic degree of PAMD were optimized in copolymerization. The optimum synthesis conditions that affect polymerization were determined to be solid content 30%, DPL content 25%, DMD content 30%, illumination time 135 min, and pH 9. The flocculation performance of flocculant PAMD with a high cationic degree was investigated in the purification of high-turbidity water. The flocculation mechanism was correspondingly studied and summarized based on Fourier transform-infrared (FTIR) analysis. Finally, the results of an experimental simulation using the response surface method show that 98.9% supernatant transmittance was achieved under dosage 4 mg/L, fast stirring time 20 min, pH 7, and stirring speed 320 rpm.

scholarly journals Nanoscale Evidence Unravels Microalgae Flocculation Mechanism Induced by Chitosan

2020 ◽  
Vol 3 (12) ◽  
pp. 8446-8459
Author(s):  
Irem Demir ◽  
Jonas Blockx ◽  
Etienne Dague ◽  
Pascal Guiraud ◽  
Wim Thielemans ◽  
...  
Keyword(s):  
Flocculation Mechanism

scholarly journals Research on the coagulant aid effects of modified diatomite on coal microbial flocculation

2019 ◽  
Vol 80 (10) ◽  
pp. 1893-1901
Author(s):  
Dong Jingshen ◽  
Liu Quanjun
Keyword(s):  
Zeta Potential ◽  
Good Effect ◽  
Coal Slurry ◽  
Single Factor ◽  
Flocculation Mechanism ◽  
Microbial Flocculant ◽  
Flocculation Effect ◽  
Chitosan Molecule ◽  
Modified Diatomite ◽  
Microbial Flocculation

Abstract Diatomite was modified by chitosan to prepare modified diatomite, and the modified diatomite in an optimized ratio was utilized in coal bio-flocculation. The interaction behavior and flocculation mechanism of modified diatomite on coal slurry water were investigated by single factor experiments, infrared spectroscopy, Brunauer-Emmett-Teller (BET) measurements, and zeta potential measurements. The single factor experiments showed that when the amount of microbial flocculant added was 1.5 ml, the temperature of coal slurry water was 39 °C, the pH was 5, and the amount of modified diatomite was 0.2 g, after 30 min of sedimentation, the flocculation transmittance of the coal slurry water reached 84.3%. The infrared spectra showed that the -NH2 and -OH of the chitosan molecule had a polar interaction with the Si-OH bond in diatomite. The BET measurements showed that the specific surface area of diatomite was not a decisive factor affecting the flocculation effect. Zeta potential measurements indicated that the amino protonation of chitosan increased the isoelectric point (IEP) of modified diatomite. These results showed that modified diatomite has a good effect on coal bio-flocculation.

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