Zhang Kaisong, Zhou Qixing, Wu Weimin
Key Laboratory Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang.
Ying Yong Sheng Tai Xue Bao. 2004 Aug;15(8):1443-6.
This paper examined the efficiency of a combined flocculants synthesized by aluminum and starch (noted as CAS) in treating kaolin suspension, domestic wastewater, municipal effluent and pulp-making wastewater. Jar test results showed that the flocculent performance of CAS was prior to polyaluminum-chloride (PAC) in treating different concentration kaolin suspension samples (100, 400 and 2000 mg x L(-1)). The optimal dose of CAS to each sample was 3.0, 2.0 and 2.0 mg x L(-1), being 60%, 50% and 50% of PAC, respectively. CAS also showed a priority to PAC in removing the COD and turbidity of domestic and municipal effluents. When treating pulp-making wastewater, the optimal dose of CAS was 70% of PAC. The removal rate of COD was enhanced 10%, the sludge was reduced 40%, and the sediment time was greatly shortened. It was also identified that the optimal concentration required to affect flocculation depended on the concentration and the character of the wastewater within the range examined. CAS was more effective in treating high turbidity wastewater.
本文研究了铝与淀粉合成的复合絮凝剂（记作CAS）处理高岭土悬浮液、生活污水、城市污水和制浆废水的效率。烧杯试验结果表明，在处理不同浓度（100、400和2000 mg·L⁻¹）的高岭土悬浮液样品时，CAS的絮凝性能优于聚合氯化铝（PAC）。每个样品的CAS最佳投加量分别为3.0、2.0和2.0 mg·L⁻¹，分别为PAC的60%、50%和50%。在去除生活污水和城市污水的化学需氧量（COD）和浊度方面，CAS也优于PAC。处理制浆废水时，CAS的最佳投加量为PAC的70%。COD去除率提高了10%，污泥量减少了40%，沉淀时间大大缩短。还确定了影响絮凝所需的最佳浓度取决于所研究范围内废水的浓度和性质。CAS在处理高浊度废水方面更有效。
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