Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9674127 | Journal of Hazardous Materials | 2005 | 11 Pages |
Abstract
An oily sludge from a rendering facility was treated using electro-kinetic (EK) techniques employing two different experimental designs. The bench scale used vertical electrodes under different operational conditions, i.e. varied electrode spacing at 4, 6 and 8Â cm with electric potential of 10, 20 and 30Â V, respectively. The highest water removal efficiency (56.3%) at bench scale was achieved at a 4Â cm spacing and 30Â V. Comparison of the water removal efficiency (51.9%) achieved at the 20Â V at 4Â cm spacing showed that power consumption at 30Â V was 1.5 times larger than that at 20Â V, suggesting a further increase of electric potential is unnecessary. The solids content increased from an initial 5 to 11.5 and 14.1% for 20 and 30Â V, respectively. The removal of oil and grease (O&G) was not significant at this experimental design. Another larger scale experiment using a pair of horizontal electrodes in a cylinder with 15Â cm i.d. was conducted at 60Â V at an initial spacing of 22Â cm. More than 40.0% of water was removed and a very efficient oil separation from the sludge was achieved indicating the viability of electro-kinetic recovery of oil from industrial sludge.
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Authors
Lin Yang, George Nakhla, Amarjeet Bassi,