湖泊疏浚底泥脱水性能对比实验研究

The Contrast Experimental Study on Lake Dredged Sediment Dewatering Performance

湖泊疏浚底泥的泥水分离是其综合利用的前提条件。以沙湖底泥为研究对象,选择化学试剂AlCl_3,FeCl_3,FeSO_4.7H_2O,Fenton作为脱水剂,采用单独添加和FeCl_3与Fenton试剂联合添加的脱水实验方案,以有效抽滤时间为参考指标,探索不同方案对底泥脱水性能的影响,结论是单独添加和联合添加方案均能有效改善底泥的脱水性能,但联合添加效果好于单独添加。最佳方案为:100 mL泥浆,含固率3%,脱水剂添加量为0.3 g FeCL_3+0.05gFeSO_4.7H_2O+25μL H_2O_2,脱水时间33 s。

The premise condition of lake dredged sediment utilization is the separation of mud and water. In the experi- ment, the sand lakes dredged sediment is used as the research object and AlCl_3,FeCl_3,FeSO_4.7H_2O and Fenton＇s as de- hydrating agent, the different experimental schemes, separately added FeC13 and Fenton or the combination of two, are ap- plied and the dehydration time is regarded as indicator to investigate the influences of different dewatering schemes on the de- hydration properties of sediment. It concludes that both separately added dehydrating agent and the combined adding can ef- fectively improve the dehydration properties of sediment, but the combined scheme is more effective than the separately added one. The best scheme is： 100 mL mud, solid content of 3% , the adding amount of the dehydrating agent is： 0.3 g FeCL_3＋0.05gFeSO_4.7H_2O＋25μL H_2O_2 and the dehydration time is 33 s.