1986 Volume 12 Issue 6 Pages 707-713
The electroosmotic dewatering mechanism for compressible sludge under the condition of constant electric current is theoretically analyzed and a basic equation is presented. The variations of water content and electric potential difference distributions in the sludge with time can be estimated by solving the equation numerically. The analytical solutions of these distributions are compared with experimental results obtained by using gelatinous bentonite sludge. The variations of applied voltage, dewatered volume, sludge bed height and average water content in the sludge are calculated from the basic equation and these results are also compared with the experimental results. It is proved that the equation obtained theoretically is reasonable for the estimation of the electroosmotic dewatering process under constant electric current.
