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Li C.,Jiangsu Jiangda Biological Technology Co. | Li C.,Waters Technology | Lu Z.,Jiangsu Jiangda Biological Technology Co. | Lu Z.,Waters Technology | And 6 more authors.
Chinese Journal of Environmental Engineering | Year: 2013

The Wuxi Xishan wetland park river sediment and dredged sewage from Gonghu Bay of Tai Lake were chosen and studied. The characteristics such as particle size distribution, mineral composition, surface groups and zeta potentials were comparatively analyzed. The process of flocculating separation and vacuum filtration with the polyacrylamide (PAM) was discussed. The results showed that these two kinds of dredge sludge had similar mineral components, organic groups and ζ potential values, but the sludge sample with higher organic matter content had a relatively high large particle proportion. Compared with the cationic PAM, the anionic PAM could get larger flocculents with less doses, but the separated liquid turbidity value was bigger. The filtration rate of the flocculation sample was affected by the size of flocculate more than the difference between ionic groups of PAM, but the moisture content of mud cake after equilibrium was slightly affected. Source

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