Yan-feng Zhuang. Application of Novel EKG and Electro-osmosis in Hydraulically Filled Sludge Dewatering and Consolidation. Proceedings of 61h Asian Regional C onference on Geosynthetics, “Geosynthetics for Infrastructure Development”, 8th-llth Nov. 2016, in New Delhi. India. Central Board oflrrigation & Power
(CBIP), New Delhi. India: KN-55 ~ KN-63. (Keynote)
ABSTRACT
Electro-Kinetic Geosynthetics (EKG) inspires enthusiasms for research on electro-osmosis. Mechanically dewatering of hydraulically filled sludge is difficult due to low hydraulic permeability of sludge, while electro-osmosis provides a promising solution. Two types of EKG, E-board and E-tube, are developed for sludge dewatering. EKG solved the problem of electrode corrosion and new challenges is high electric power requirement. Energy level gradient theory is presented as a fundamental theory to propose design method for sludge dewatering. Key parameters of flow coefficient and time factor are discussed, including their test method, value range and scale effect. Roll polling electro-osmosis scheme is the solution for high power requirement. Estimation of power and design of roll polling electro-osmosis scheme is core of electro-osmotic dewatering design. Novel DC power source is custom built to realize the roll polling scheme. The DC power source of 80V/1000A has roll polling program embedded and it is in charge of 12 independent sections, which can deal with ~2000 square meters of hydraulically filled area.