Anionic polymer compound bioflocculant as a coagulant aid with aluminum sulfate and titanium tetrachloride.
Anionic polymer compound bioflocculant as a coagulant aid with aluminum sulfate and titanium tetrachloride.
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DOI：
10.1016/j.biortech.2012.01.012
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发表时间：
2012-03
影响因子：
11.4
通讯作者：
Yanxia Zhao;B. Gao;H. K. Shon;Yang Wang;J. Kim;Q. Yue;X. Bo
中科院分区：
文献类型：
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作者：
Yanxia Zhao;B. Gao;H. K. Shon;Yang Wang;J. Kim;Q. Yue;X. Bo
研究了阴离子聚合物复合生物絮凝剂(CBF)对四氯化钛(TiCl4)和硫酸铝(Al2(SO4)3)混凝性能和絮凝性能的影响。并考察了给药顺序的影响。用激光衍射仪测定了絮体的大小、破损、再生和絮体的分维。结果表明，TiCl4或Al2(SO4)3混凝剂与CBF具有协同作用，促进溶解有机碳(DOC)去除。对于TiCl4和Al2(SO4)3，CBF的投加均能提高絮体的回收率，但TiCl4和相应的复配混凝剂形成的絮体的回收能力弱于Al2(SO4)3和相应的复配混凝剂。分维分析表明，絮体的分维值随混凝剂投加量的增加而增大。CBF对TiCl4和Al2(SO4)3产生的絮体分维的影响不同。
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 (TiCl4) and aluminum sulfate (Al2(SO4)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 TiCl4or Al2(SO4)3coagulants exhibited synergistic effects by promoting dissolved organic carbon (DOC) removal. For both TiCl4and Al2(SO4)3, the floc recoverability was improved by CBF addition, and the flocs formed by TiCl4and the corresponding dual-coagulants showed weaker recovery ability than those by Al2(SO4)3and 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 TiCl4was different from that of Al2(SO4)3.