超声清洗在含油污泥处理中的中试研究。
Ultrasonic washing for oily sludge treatment in pilot scale.
机构信息
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
出版信息
Ultrasonics. 2018 Nov;90:1-4. doi: 10.1016/j.ultras.2018.05.013. Epub 2018 May 31.
Ultrasonic technology is a promising tool for washing oily sludge to remove oil, however, little information has been provided on the pilot scale application of ultrasonic washing. In this study, the ultrasonic conditions were optimized based on the pilot trial of the effects of ultrasonic properties on oil removal from oily sludge. An ultrasonic power of 0.24 w/cm was necessary to overcome the energy threshold for oil washing at the frequency of 25 kHz. The removal rate was changed from 46.0% to 60.7% with oily sludge content from 25.0% to 42.0%, respectively. The addition of surfactants could improve oil recovery, and the optimizing content for sodium petroleum sulfonate and Span 80 was 0.3% and 0.03%, respectively. A series of pilot scale test indicated that the oil removal rate could be 82-90% by ultrasound assistant with surfactants (Span 80). Thin-layer chromatographic flame ionization detection showed that the removal rate by ultrasonic wash was dropped with the increase of composition polarity. However, under the assistance of surfactants (Span 80), all compositions could be effectively removed. This pilot study will greatly improve the application of ultrasonic technology in oily sludge treatment.
超声技术是一种很有前途的洗油污泥工具，可以去除油，但是，关于超声洗涤在中试规模应用的信息很少。在本研究中，根据超声特性对含油污泥除油效果的中试试验，优化了超声条件。在 25 kHz 的频率下，需要 0.24 w/cm 的超声功率来克服洗油的能量阈值。当含油污泥含量从 25.0%增加到 42.0%时，去除率从 46.0%增加到 60.7%。添加表面活性剂可以提高油回收率，对于石油磺酸钠和 Span 80 的最佳含量分别为 0.3%和 0.03%。一系列中试试验表明，超声辅助表面活性剂（Span 80）的除油率可达 82-90%。薄层层析火焰离子化检测表明，随着组成极性的增加，超声洗涤的去除率下降。然而，在表面活性剂（Span 80）的辅助下，所有成分都可以被有效去除。这项中试研究将极大地提高超声技术在含油污泥处理中的应用。
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