Abstract In this study, the characteristics of a bioflocculant produced by using activated sludge as raw materials were investigated. The performance of this bioflocculant in the removal of Pb(II) from aqueous solution and the corresponding mechanisms were determined as well. After cultivating a bioflocculant-producing strain in an alkaline thermal pre-treatment sludge for 60 h, approximately 4.45 g of bioflocculant containing a protein backbone was harvested from 1 L of fermentation broth. This bioflocculant can remove 98.5% of Pb(II) from aqueous solutions under optimal conditions, which include a bioflocculant dosage of 6 mg/L and a CaCl2 concentration of 70 mg/L at a pH of 6.5.

中文翻译：

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活性污泥法制备生物絮凝剂及其在去除水溶液中Pb(II)中的应用

摘要 本研究对以活性污泥为原料生产的生物絮凝剂的特性进行了研究。还确定了这种生物絮凝剂从水溶液中去除 Pb(II) 的性能和相应的机制。在碱性热预处理污泥中培养产生生物絮凝剂的菌株 60 小时后，从 1 L 发酵液中收获了约 4.45 g 含有蛋白质骨架的生物絮凝剂。该生物絮凝剂可以在最佳条件下从水溶液中去除 98.5% 的 Pb(II)，包括 6 mg/L 的生物絮凝剂剂量和 70 mg/L 的 CaCl2 浓度，pH 值为 6.5。