Electrokinetic Remediation. The second function is to induce electroosmosis. Electroosmosis is the directional movement of pore water in soil, from anode to cathode, providing a flushing action, even in the tightest clays. This electroosmotic flow is the proven advantage of using DC electricity over AC (including 6phase resistive heating)...
Buijs and coworkers have performed electroosmotic dewatering of commercial sludge on pilot plant scale and on real process scale. The energy consumption for dewatering was found to be within the range of 20–40 kJ kg −1. The removal of water from food suspensions is .
However, the dewatering of sludge in geotube is inefficient. In this paper, for improving dewatering efficiency and laying a basis for the further study of largescale electroosmotic dewatering in geotube, electroosmosis has been applied to silt dewatering experiments in small hangbag.
Jun 22, 2016· Chi Kit, MOK, Design and modelling of electroosmotic dewatering, University of Newcastle upon Tyne School of Civil Engineering and Geosciences, August 2006, Thesis L8276. [2].
Dewatering systems are designed to be in close contact with tailings and if they can perform the dual function of recovering water while extracting metals, they would fully meet the demands of the mining industry. One of the most efficient techniques which can harness both dewatering and metal extraction is .
(a)(b) Figure 3. The steadystate inducedcharge electroosmotic flow around (a) a conducting cylinder with zero net charge and (b) a positively charged conducting cylinder. The ICEO slip velocity depends on the product of the steady field and the induced zetapotential.
The aim of dewatering is the decrease of transport and disposal costs, but the efficiency of the mechanical dehydration methods is low. Electroosmosis could be a suitable technique to reduce water content of the final sludge by the application of an electric field.
pumping methods of dewatering may not be adequate. In such cases, the electroosmosis procedure may be helpful. Electroosmotic (EO) dewatering is a technique that removes water from soils under the application of direct current (DC) electric field across the soil to be dewatered. Electroosmotic
The increased electrical resistance resulted in an increase in the invalid energy consumption, and the reduced voltage gradient at the undewatered section resulted in an attenuation in electroosmotic flow and dewatering effect. Comparison tests conducted with the movinganode apparatus further demonstrated the attenuation mechanism.
A NUMERICAL INVESTIGATION INTO ELECTROOSMOTIC FLOW IN MICROCHANNELS WITH COMPLEX WAVY SURFACES: Scale Growth in the Dewatering of Iron Ore: Influence of the external solution in the electroosmotic flux induced by realkalisation: Reed Beds for Sludge Dewatering and Stabilization: Remarks about the research of the absorptive capacity construct
Jan 01, 2016· The increased electrical resistance resulted in an increase in the invalid energy consumption, and the reduced voltage gradient at the undewatered section resulted in an attenuation in electroosmotic flow and dewatering effect. Comparison tests conducted with the movinganode apparatus further demonstrated the attenuation mechanism.
Electroosmotic dewatering: an efficient method of sludge management Jami, Mohammed Saedi and Iwata, Masashi and Tanaka, Takanori (2015) Electroosmotic dewatering: an .
Many mining operations produce tailings that dewater very slowly under selfweight consolidation. One way of reducing the water content of such tailings is by electroosmotic dewatering. Although the technique has been used with some success in civil engineering applications, it is still largely seen as a solution of last resort.
osmotic dewatering (EOD) process is considered most efficient over these conventional dewatering processes as an alternative energy saving [1]. It can be also efficient as compared to thermal processing of sludge forde watering 2 The electroosmotic dewatering process can be classified
It should be emphasized that electroosmotic dewatering is most attractive when the water is trapped be tween finegrained clay particles. In 1808 the discovery of electroosmosis phenomenon (Amirat Shelukhin, 2008) by Reiss
After the EK dewatering model tests, a significant overall increase in the undrained shear strength and decrease in the water content of tailings samples are observed, .
During electroosmotic dewatering, the environment at an electrode functioning as an anode is likely to be particularly harsh, and might require an especially chemically resistant material.
Dewatering by electrokinetic process is found effective in reducing the high water content. In geotechnical application electrokinetic treatment is applied in soil with low permeability, high pore water and fine grained soils. Electrokinetic treatment is done by applying electric current through electrodes. II. ELECTROOSMOSIS THEORY