School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
Bioresour Technol. 2012 Mar;108:45-54. doi: 10.1016/j.biortech.2012.01.012. Epub 2012 Jan 10.
The objectives of this study are to investigate the impacts of anionic polymer compound bioflocculant (CBF) as a coagulant aid on coagulation performance and floc characteristics with titanium tetrachloride (TiCl(4)) and aluminum sulfate (Al(2)(SO(4))(3)). The effect of dosing sequence was also investigated. Floc size, breakage, regrowth and floc fractal dimension were examined using a laser diffraction instrument. The results showed that CBF with TiCl(4) or Al(2)(SO(4))(3) coagulants exhibited synergistic effects by promoting dissolved organic carbon (DOC) removal. For both TiCl(4) and Al(2)(SO(4))(3), the floc recoverability was improved by CBF addition, and the flocs formed by TiCl(4) and the corresponding dual-coagulants showed weaker recovery ability than those by Al(2)(SO(4))(3) and the corresponding dual-coagulants. Fractal dimension analysis demonstrated that the floc fractal dimension values increased with the increasing coagulant dose. The effect of CBF on fractal dimension of the flocs generated by TiCl(4) was different from that of Al(2)(SO(4))(3).
本研究旨在探讨作为助凝剂的阴离子聚合物复合生物絮凝剂（CBF）与四氯化钛（TiCl4）和硫酸铝（Al2(SO4)3）联用对混凝性能和絮体特性的影响，并考察投加顺序的影响。采用激光衍射仪考察了絮体粒径、破碎、再生和絮体分形维数。结果表明，CBF 与 TiCl4或 Al2(SO4)3混凝剂联用具有协同作用，可促进溶解性有机碳（DOC）的去除。对于 TiCl4和 Al2(SO4)3，投加 CBF 均可提高絮体的恢复能力，且 TiCl4及其对应的双药剂形成的絮体的恢复能力弱于 Al2(SO4)3及其对应的双药剂形成的絮体。分形维数分析表明，絮体分形维数随混凝剂投加量的增加而增加。CBF 对 TiCl4生成絮体的分形维数的影响不同于 Al2(SO4)3。
