• 关键词：味精废水  天然物质  壳聚糖  浊度  絮凝剂  污水处理

• 基金项目：国家重点基础研究发展规划(973)项目(No2004CB418503);国家杰出青年科学基金(No20225722);国家科技攻关计划子专题(No2003BA614A-10-01)

• 刘睿
• 辽宁省分析科学研究院, 沈阳110015

• 周启星
• 1. 中国科学院沈阳应用生态研究所, 中国科学院陆地生态过程重点实验室, 沈阳110016; 2. 南开大学环境科学与工程学院, 天津300071

• 杜连柱
• 吉林大学环境与资源学院, 长春130026

• 董军
• 吉林大学环境与资源学院, 长春130026

• 摘要：利用天然物质城市草炭土、草甸土、火山岩和红壤与壳聚糖絮凝剂絮凝复配处理味精废水,并对影响絮凝复配过程中味精废水浊度去除率的助剂投加量、壳聚糖用量和pH值的影响做了进一步的探讨.结果表明,壳聚糖经天然物质复配絮凝处理味精废水后的浊度去除率均优于复配前,其中草甸土和红壤最为突出.在最佳复配比例为m(草甸土):m(壳聚糖)=5:1、pH为1.0～2.0(即在原味精废水中)时,草甸土复配后味精废水浊度去除率为45.77%;对于红壤,在最佳复配比例为m(红壤):m(壳聚糖)=25:3、pH=6.0时,其浊度最佳去除率为78.41%.此絮凝复配方法为味精废水的处理提供了一种廉价的新方法.

• Abstract：Wastewater from monosodium glutamate (MSG) production was tentatively treated using a new flocculant which was prepared by compounding chitose with natural materials including urban grass peat soil, meadow soil, pozzolan and red soil. And some influencing factors such as the amount of auxiliary reagents added, dosage of chitose and pHchanges were discussed on the basis of the removal rates of turbidity in MSGwastewater. The results showed that the flocculation performance of the chitose-based compound flocculants was more efficacious than chitose itself. The optimum compound proportion for treating turbidity in MSGwastewater was meadow soil (g) : chitose (g) = 5:1, the optimal pH=1.0～2.0; red soil (g) : chitose (g) = 25:3, the optimal pH=6.0. Under the optimal conditions, the removal rate of turbidity by the two compound flocculants was much higher than that by chitose alone, up to 45.77% and 78.41%, respectively. The flocculating compound can provide with a new low-cost method for treating MSGwastewater.

• Key words：monosodium glutamate wastewater  natural material  chitose  turbidity  flocculant  wastewater treatment

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