South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou 510655, China.
Water Sci Technol. 2010;62(8):1907-13. doi: 10.2166/wst.2010.478.
Studies of the flocculation properties of bioflocculant combined with its structure characterization are helpful to develop more effective bioflocculant. This paper reports findings of our research on the flocculation properties of the bioflocculant ZS-7 in the kaolin suspension based on its structure characterization. With the addition of 2 mg/L ZS-7 and 9 mM CaCl(2), the optimum temperature for flocculation performance of ZS-7 in the kaolin suspension is about 30°C, giving the highest flocculating activity 99.2%. Studies of the flocculation properties revealed that it was stable at 60-100°C and pH 4-10. Moreover, it could flocculate a kaolin suspension over a wide range of pH (2-12) and temperatures (4-95°C) in the presence of CaCl(2).
研究生物絮凝剂的絮凝性能及其结构特征有助于开发更有效的生物絮凝剂。本文基于其结构特征，报道了我们对生物絮凝剂 ZS-7 在高岭土悬浮液中的絮凝性能的研究结果。当添加 2mg/L 的 ZS-7 和 9mM 的 CaCl(2)时，ZS-7 在高岭土悬浮液中的最佳絮凝性能温度约为 30°C，此时具有最高的絮凝活性 99.2%。对絮凝性能的研究表明，它在 60-100°C 和 pH 值 4-10 之间稳定。此外，在 CaCl(2)存在下，它可以在很宽的 pH 值（2-12）和温度（4-95°C）范围内絮凝高岭土悬浮液。
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