Title: Morphology and mechanism of sludge flocculation based on mesoscopic simulation
Abstract:The mesoscopic dynamics model was built to study the flocculation between colloidal particles and adsorbing linear polymer chains.The model was investigated especially for the flocculation of sludge a...The mesoscopic dynamics model was built to study the flocculation between colloidal particles and adsorbing linear polymer chains.The model was investigated especially for the flocculation of sludge and polyacrylamide and the dewatering of sludge.The flocculation model of colloidal particles with the negative electricity and positively charged polymer chains was built by establishing a coarse-grained model and using the force field of empirical potential function.The appearance of the aggregate structures was obtained by simulation and bridging of colloidal particles and neutralizing the charge on the surface of particles by polymer chains,leading to flocculation was proved by the model.The variation of the potential energy during flocculation as a function of normalized time was also studied.The morphology of aggregates was observed directly by the use of transmission electron microscope.At last,the influence on flocculation created by the variations of the exponent A and B of polymer chains showed that higher ionic degree facilitated flocculation.But the floc was more complex at the same time,which was unfavorable for sludge dewatering.Read More
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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