Study on the Combined Conditioning Effect of High Efficiency Dehydration of River Sediment. Issue 5 (July 2020)

• Record Type: Journal Article
• Authors: Lin, Jieli; Huang, Minyi; Xie, Zhihao; Liu, Guohui; Zhu, Haocheng; Yu, Renrong
• Is Part Of: IOP conference series. Volume 546:Issue 5(2020)
• Publication Date: 2020-07
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/546/5/052023
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: It is the most difficult problem for treating river sediment through the work of the whole river regulation. How to solve the problem of low efficiency of river sediment dewatering has become an urgent problem. In this paper, the sediment from the river of Chencun town in Foshan was chosen as the research object. Different kinds of conditioners were selected for single factor experiment, compound conditioning experiment of inorganic coagulants and organic flocculants, and combined conditioning experiment of adding self-made conditioner. The sedimentation speed, the turbidity and the water content were measured for analysis of the change of dehydration performance. The results showed that the effect of CPAM conditioning was the best in case of single factor experiment with the speed of 1.76 cm.min −1, the turbidity of 0.82 mg.L −1 and the water content of 60.21%. The lowest water content was under 60% in case of compound conditioning. When self-made PSM was combined with inorganic and organic conditioning for the sediment, the water content became 43.15% where the speed and the turbidity were equal to 2.80 cm.min −1, 0.23 mg.L −1, respectively. Therefore, the combined conditioning scheme not only improved the dehydration rate of sediment, but also improved the degree of sediment dehydration, which achieved the goal of high efficiency dehydration and low cost.