Study on the degradation of black liquor by using high-frequency ultrasound
Received date: 2004-03-25
Online published: 2010-10-01
The black liquor (taken from Wuhan Chenming Papermaking Co., Ltd.) was sonicated by 1 040 kHz ultrasound (US). The effects of US frequency, dissolved gas, ionic strength and coexist catalyst on ultrasonic degradation efficiency of black liquor have been studied. The results are as follow:(1)Compared with the low frequency US, high frequency US has stronger capability of the degradation of organic contaminants. In the first 30 min, the removal ratio of CODCr is 20.8%;(2)High-molecule contaminants are easier to be degraded with the dissolved gas coexisting;(3)Addition of appropriate NaCl enhanced the degradation efficiency of black liquor; (4)Coexistent TiO2 increases the ultrasonic degradation efficiency.
Key words： high-frequency ultrasound; black liquor; degradation; wastewater treatment
Wu Xiaohui, Zhou Shan, Lu Xiaohua . Study on the degradation of black liquor by using high-frequency ultrasound[J]. Industrial Water Treatment, 2004 , 24(10) : 36 -38 . DOI: 10.11894/1005-829x.2004.24(10).36
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