Study of catalytic wet air oxidation to be used in the pretreatment of phenol wastewater
Received date: 2001-09-14
Online published: 2010-10-01
Compared with wet air oxidation, catalytic wet air oxidation has better effect on treating wastewater under mild conditions. Two kinds of catalyst are prepared:CuO/η-Al2O3and AC catalysts. Firstly, the effect of these catalysts on catalytic wet air oxidation to be used in phenol wastewater treatment under different conditions is evaluated. The results show that raising pH value in the solution has disadvantageous effect on the removal of CODCr from phenol wastewater. As to CuO/η-Al2O3 and AC catalysts, the CODCr removal rate is higher under mild conditions:after 1 h reaction time, at 140 ℃, the CODCr removal rate reaches 93. 2% and 88. 4% respectively;and at 160 ℃, the CODCr removal rate reaches 93. 4% and 90. 1% respectively. But at 140 ℃, after the phenol wastewater is treated by wet air oxidation for 1 h, the BOD5/CODCr reaches only 0. 08. The effect of different biodegradability is resulted from using different catalysts. BOD5/CODCr reaches 0. 30 by using catalyst CuO/η-Al2O3, while BOD5/CODCr reaches 0.18 by using catalyst activated carbon as catalyst. Therefore using CuO/η-Al2O3 as catalyst to treat phenol wastewater can get the pretreatment effect under lower temperature.
CHEN Yong jun, DOU He rui, YANG Min, GAO Xi yan, WU Ming, CUI Gui lin, SUN Cheng lin . Study of catalytic wet air oxidation to be used in the pretreatment of phenol wastewater[J]. Industrial Water Treatment, 2002 , 22(6) : 19 -22 . DOI: 10.11894/1005-829x.2002.22(6).19
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