Bentonite beds, initially 0.5-2.0 cm in height, were dewatered by elec
troosmosis with a constant current of 90 mA. The fraction of the initi
al water removed increased most rapidly for the thinnest bed, in contr
ast to results with constant voltage dewatering. To realize the full p
otential of thin beds for fast dewatering. constant current should be
used