Molecular weight, flocculants

Low Molecular Weight Flocculants - Contrary to the trend to increase molecular weight, which has resulted in the commercial availability of ultra high molecular weight (HMW) flocculants, there are a number of applications where low molecular weight (LMW) flocculants are gaining considerable credibility. 

An air flotation method was proposed for breaking o/w emulsions after its treatment with a cationic, high molecular weight flocculent. It has been found that in the presence of the flocculent the emulsion film is less stable than the starting pseudo-emulsion film, which determines the efficiency of the process [246]. The flocculent improves oil spreading on the water-air surface, thereby enhancing separation efficiency. 

Scientific Basics of the Synthesis of a High-Molecular-Weight Flocculent [24, 25, 39, 40]... 

SCIENTIFIC BASICS OF THE SYNTHESIS OF A HIGH-MOLECULAR-WEIGHT FLOCCULANT... 

Higher molecular weight flocculants can provide cost effective performance in sedimentation, centrifugation and belt filtration applications ... 

Organic coagulants are used mainly in low solids environment such as potable water and industrial effluent treatment. They can also be used in combination with high molecular weight flocculants. In particular, the addition of a coagulant improves filtrate and centrate clarities, when the flocculant treatment alone is imable to attain acceptable levels. 

Systematic tests with selected anionic products have shown high molecular weight flocculants with low to medium charge densities (—2 to —4 meq/g) to be optimal for flocculating excess sludge (Figs. 7, 8). In these floe-... 

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