[1]李明珠,杨 楠,肖 航,等. 钙基聚合硫酸铁添加对河道底泥电渗脱水的影响[J].湖北工业大学学报,2020,(4):80-84.
　LI Mingzhu,YANG Nan,XIAO Hang,et al. Effect of CaPFS Addition on Electroosmotic Dewatering for River Sediment[J].,2020,(4):80-84.
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 钙基聚合硫酸铁添加对河道底泥电渗脱水的影响()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
期数:
2020年第4期
页码:
80-84
栏目:
湖北工业大学学报
出版日期:
2020-08-31

文章信息/Info

Title:
 Effect of CaPFS Addition on Electroosmotic Dewatering for River Sediment
文章编号:
1003-4684(2020)04-0080-05
作者:
 李明珠1;  杨 楠1;  肖 航1;  张会琴1; 2;  刘德富1; 2;  皮科武1; 2
 1 湖北工业大学土木建筑与环境学院， 湖北 武汉 430068;
 2 河湖生态修复与藻类利用湖北省重点实验室， 湖北 武汉 430068
Author(s):
 LI Mingzhu1;  YANG Nan1;  XIAO Hang1;  ZHANG Huiqin1; 2;  LIU Defu1;  2 ;  PI Kewu1; 2
 1 School of Civil Engin.,Architecture and Environment,Hubei Univ.of Tech.,Wuhan 430068,China；
 2 Hubei Key Laboratory of Ecological Restoration of lakes[JZ]and Utilization of Algae, Wuhan 430068,China
关键词:
 ; 钙基聚合硫酸铁;  河道底泥;  电渗脱水;  脱水能效
Keywords:
 ; calcium-based poly ferric sulfate (CaPFS);  river sediment;  electroosmotic dewatering;  Energy efficiency of dewatering
分类号:
X705
文献标志码:
A
摘要:
 通过控制钙基聚合硫酸铁（CaPFS）的投加量对某河道底泥进行电渗脱水实验，探索CaPFS投加量对底泥pH、电导率、脱水能耗、脱水能效及脱水过程中底泥温度、粒径分布的影响。结果表明：在CaPFS最佳投加量为0.3~0.5 gFe/kgDS（绝干泥）、电渗脱水电压为10 V时，可将含水率为68.0%的底泥降低至58.6±0.4%，脱水能效为0.07±0.01 kWh/kg滤液，其脱出水pH为10.6±0.3，电导率为728.1±7.5 μs/cm。实验发现随CaPFS的加入，底泥电渗脱水经历三个阶段，第一阶段以电泳为主，第二阶段以电渗脱水为主，第三阶段则以离子电迁移为主，且三阶段内脱水能效和含水率整体呈“∪”形，而出水电导率呈“∩”形。
Abstract:
 Sediment, the main source of endogenous pollution, is an important part of river and lake system. After dredging, the sediment contains complex pollutants and high water content, resulting in serious secondary pollution without proper disposal. In this paper, a kind of coagulant named calcium-based poly ferric sulfate (CaPFS) was employed to dehydrate the sediment on the consideration of dosage on the pH, conductivity and dewatering energy consumption for per kg filtrate. The variation of energy efficiency, temperature of sediment and particle size distribution during dewatering were also presented. It showed that the final water content of the sediment decreased to 58.6 ± 0.4% from initial of 68.0% on the optimal dosage of 0.3~0.5 gFe/kgDS (Dry Solid) and a cell voltage of 10 V. The dewatering energy efficiency was 0.07 ± 0.01 kWh/kg filtrate, the pH of the filtrate was 10.6 ± 0.3 and the conductivity was 728.1 ± 7.5 μs/cm. It is also found the electroosmotic dewatering for the river sediment undergoes three stages as the addition of CaPFS increasing, electrophoresis, electrophoresis and ion migration orderly. The dewatering energy efficiency and final water content of mud cake are in the shape of"∪" as a whole, while conductivity of filtrate presents a shaped "∩".

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备注/Memo

备注/Memo:
［收稿日期］ 2019-10-22
［基金项目］ 国际合作水污染防治重大科技项目(2017ZX07101003-008)
［第一作者］ 李明珠(1995-)， 女，湖北荆门人， 湖北工业大学硕士研究生，研究方向为河道底泥处理
［通信作者］ 皮科武(1975-)， 男， 湖北益阳人， 工学博士，湖北工业大学教授，研究方向为淤污泥生态处理与清洁生产
更新日期/Last Update: 2020-08-16