Oil recovery from refinery oily sludge via ultrasound and freeze/thaw
Oil recovery from refinery oily sludge via ultrasound and freeze/thaw
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DOI：
10.1016/j.jhazmat.2011.12.016
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发表时间：
2012-02-15
影响因子：
13.6
通讯作者：
Song, Xinyuan
中科院分区：
文献类型：
--
作者：
Zhang, Ju;Li, Jianbing;Song, Xinyuan
石油工业产生的含油污泥的有效处置日益受到关注，从此类废物中回收油被认为是一种可行的选择。在这项研究中，研究了三种不同的方法，包括单独的超声波处理，单独的冷冻/解冻和超声波和冷冻/解冻联合处理的石油回收。结果表明，综合考虑采油率、采油废水中总石油烃（TPH）浓度等因素，该组合工艺具有较好的处理效果。考察了超声波功率、超声波处理时间、泥水比、生物表面活性剂（鼠李糖脂）和盐（NaCl）浓度等5个因素对组合工艺的影响。在不添加生物表面活性剂和无机盐的情况下，当超声功率为66 W，超声处理时间为10 min，污泥/水为1：2时，原油采收率可达80.0%。对各因素的考察表明，添加低浓度的鼠李糖脂（
The effective disposal of oily sludge generated from the petroleum industry has received increasing concerns, and oil recovery from such waste was considered as one feasible option. In this study, three different approaches for oil recovery were investigated, including ultrasonic treatment alone, freeze/thaw alone and combined ultrasonic and freeze/thaw treatment. The results revealed that the combined process could achieve satisfactory performance by considering the oil recovery rate and the total petroleum hydrocarbon (TPH) concentrations in the recovered oil and wastewater. The individual impacts of five different factors on the combined process were further examined, including ultrasonic power, ultrasonic treatment duration, sludge/water ratio in the slurry, as well as bio-surfactant (rhamnolipids) and salt (NaCl) concentrations. An oil recovery rate of up to 80.0% was observed with an ultrasonic power of 66W and an ultrasonic treatment duration of 10 min when the sludge/water ratio was 1:2 without the addition of bio-surfactant and salt. The examination of individual factors revealed that the addition of low concentration of rhamnolipids (