摘要
在 2L高压间歇反应釜内 ,研究了乳化液废水湿式氧化 (WAO)的效果、影响因素及动力学特征 .结果表明 :温度、氧分压、进水浓度等操作条件对氧化效果有不同程度的影响 ,其中温度是关键的影响因素 .进水COD为 4 80 0 0mg·l- 1时 ,在 2 2 0℃ ,1 2 5倍理论供氧量的条件下 (氧分压为 1 2MPa) ,反应 2h ,去除率达 86% ,经拟合的反应动力学模型为 :-dCODdt =0 0 94 63exp ( -4 5 92 8× 1 0 3RT ) [COD]2 0 15[PO2 ]0 3 118-dTOCdt =0 3 770exp ( -4 7 84 1× 1 0 3RT ) [TOC]1 978[PO2 ]0 3 0
A systematic study on wet air oxidation(WAO)of the emulsification wastewater was performed in a 2-litre high-pressure batch autoclave,with emphasis on the oxidation efficiency, influence factors and its kinetic characteristics.According to the expericental results,temperature,oxygen partial pressure,organic concentration in the wastewater and other operation conditions had influence on oxidation efficiency to different extent,among which temperature was the key factor:86% of COD Cr in the wastewater(initial COD Cr 48000mg·l -1)was removed after 2 hours'oxidation at 220℃,with the supply of oxygen pressure 1 2MPa.Empirical model for the WAO process on the treatment of emulsifying wastewater was developed.It was concluded from the study that WAO process could be widely applied in the emulsification wastwater treatment.
出处
《环境化学》
CAS
CSCD
北大核心
2002年第6期558-563,共6页
Environmental Chemistry
基金
"九五"国家科技攻关项目 ( 1 996 90 9 0 5 0 2 0 2 )
