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Wet air oxidation of oily sludge using Ni 2+ catalyst
Author(s) -
Jing Guolin,
Luan Mingming,
Chen Tingting
Publication year - 2013
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.10618
Subject(s) - wet oxidation , catalysis , chemistry , pollutant , residence time (fluid dynamics) , waste management , sewage treatment , environmental chemistry , pulp and paper industry , nuclear chemistry , environmental engineering , environmental science , organic chemistry , geotechnical engineering , engineering
This work studied the feasibility of treating oily sludge by means of wet air oxidation (WAO) at high temperatures. The effect of the operating conditions on COD removal of the oily sludge, including temperature, the initial COD of the oily sludge, residence time, concentration of catalyst, and O 2 excess (OE), was studied. WAO has been proved to be a very efficient technology for the treatment of those residual currents, resulting in destruction efficiencies of greater than 80% of initial COD. Adding a catalyst significantly improved the COD removal. Homogenous catalyst, Ni 2+ , showed effective removal for pollutants. COD removal was 97.8% in the catalytic wet air oxidation (CWAO) over Ni 2+ catalyst. The results proved that the CWAO was an effective pretreatment method for the oily sludge. © 2011 American Institute of Chemical Engineers Environ Prog, 32: 99–102, 2013.