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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 55, Number 5
JKCSEZ 55(5)
October 20, 2011 

An Effective Process for Removing Organic Compounds from Oily Sludge
Guolin Jing*, Mingming Luan, Tingting Chen, Chunjie Han
Wet air oxidation, Catalytic wet air oxidation, Oily sludge, COD removal
Wet air oxidation (WAO) of oily sludge was carried out using Fe3+ as catalyst, placed in a 0.5 L batch autoclave in the temperature range of 250-330 oC. Experiments were conducted to investigate the effects of temperature, the initial COD, reaction time, concentration of catalyst and O2 excess (OE) on the oxidation of the oily sludge. The results showed that in the WAO 88.4% COD was achieved after 9 min reaction at temperature of 330 oC, OE of 0.8 and the initial COD of 20000 mg/L. Temperature was found to have a significant impact on the oxidation of oily sludge. Adding a catalyst significantly improved the COD removal. Homogenous catalyst, Fe3+, showed effective removal for pollutants. COD removal was 99.7% in the catalytic wet air oxidation (CWAO) over Fe3+ catalyst. The results proved that the CWAO was an effective pretreatment method for the oily sludge.
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