Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 260-264 |
| Number of pages | 5 |
| Journal | Journal of Environmental Management |
| Volume | 90 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2009 |
Keywords
- Anaerobic sludge
- Coenzyme F
- DHA
- Irradiation period
- Low-intensity ultrasound
- Ultrasonic intensity
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