کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1058092 | 947104 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Improvement of the activity of anaerobic sludge by low-intensity ultrasound Improvement of the activity of anaerobic sludge by low-intensity ultrasound](/preview/png/1058092.png)
This paper aims to study the enhancement effect of low-intensity ultrasound on anaerobic sludge activity and the efficiency of anaerobic wastewater treatment. Dehydrogenate activity (DHA) and the content of coenzyme F420 were detected to indicate the change of activity of anaerobic sludge induced by ultrasound at 35 kHz. Single-factor and multiple-factor optimization experiments showed that the optimal ultrasonic intensity and irradiation period were 0.2 W/cm2 and 10 min, respectively, and the biological activity was enhanced dramatically under the optimal condition. The chemical oxygen demand (COD) removal efficiency was increased by ultrasonic treatment and the COD in the effluent was 30% lower than that of the control (without exposure). The hypothetical mechanism of biological activity enhancement by ultrasound was also discussed according to the results.
Journal: Journal of Environmental Management - Volume 90, Issue 1, January 2009, Pages 260–264