天然物质复配铁型絮凝剂及其处理味精废水的研究

Research on a Compound Iron-flocculant with Natural Materials and Its Treatment for Monosodium Glutamate Wastewater

采用不同天然物质(城市草炭土、草甸土、火山灰和红壤)与聚合硫酸铁复配,制备一种更为经济的新型絮凝剂,利用其对高浓度有机味精废水进行絮凝实验,并讨论了各组分的不同投加量比例及其絮凝的影响因素.研究结果表明:此种天然物质-聚合硫酸铁复配絮凝剂处理味精废水表现出优良的絮凝性能.其中以草甸土、红壤为天然复配材料处理效果最为显著,其最佳投加量比例为草甸土(g)∶聚合硫酸铁(m l)∶助剂(g)=11∶4∶6,最佳pH为7.0—8.0;红壤(g)∶聚合硫酸铁(m l)=10∶6,最佳pH为1.0—2.0.在此条件下,该天然复配铁型絮凝剂对味精废水的CODcr去除率远远高于聚合硫酸铁(PFS)本身,分别可达到71.1%和55.0%.

The new economic flocculants were synthesized （urban grass peat soil, meadow soil, pozzolan and （PFS）. Influences of types of natural materials, combining various natural materials soil ） with polymer ferric sulphate dosage of PFS, auxiliary reagents, pH and other factors on flocculation performance of the flocculant were investigated by treating monosodium glutamate wastewater. The results showed that the natural compound iron-flocculant displayed its favorable flocculation performance and high treatment effectiveness. When meadow soil and red soil were added, the removal rate of CODer in monosodium glutamate wastewater was highest and their flocculation performance was most prominent. The optimum compound proportion for treating CODer in monosodium glutamate wastewater was meadow soil （g） ： PFS （ml） ： auxiliary reagent （CaC12） （g） =11： 4： 6,the optimal pH =7. 0-8.0; red soil （g）： PFS （ml） = 10： 6,the optimal pH = 1.0-2. 0. Under the optimal conditions,the removal rate of CODcr using the two compound flocculants was much higher than that using PFS alone, up to 71.1% and 55.0% ,respectively.