Experimental study on composite flocculant-electroosmosis combined with segmented solidification treatment of high-water-content slurry

Abstract

To address the challenges related to high drainage efficiency, energy consumption, and turbidity in traditional electroosmosis methods, particularly for mud with ultra-high water content and high clay content, this study proposes a novel research approach: the combined flocculant-electroosmosis combined with segmented solidification treatment of high-water-content slurry.This study explores the mechanism of action and drainage effect of the composite flocculant-electroosmotic method using a self-developed one-dimensional electroosmosis test device. The test results show that there is an optimal ratio of organic flocculant (anionic polyacrylamide,APAM) and inorganic flocculant (polymeric aluminum chloride,PAC,and anhydrous calcium chloride,CaCl2) combined with the composite flocculant.Compared with the traditional single flocculant-electroosmosis method, the drainage volume of the composite flocculant-electroosmotic combined method is increased by an average of 73.76%. Although the total electroosmotic energy consumption and anode corrosion of the composite flocculant group have increased, the average electroosmotic energy consumption coefficient and anode corrosion coefficient are higher, indicating that the energy consumption coefficient is better than that of the traditional electroosmotic group. Innovatively, segmental solidification was carried out based on the anode corrosion cracks and sudden changes in water content after the completion of electro-osmosis, which yielded excellent reinforcement effects and met the requirements of external transportation and reuse.