Ultrasonic pre-treatment of biosolid Online publication date: Fri, 25-Apr-2008
by Guangming Zhang, Huanzhi Liu, Panyue Zhang, Ying Zhang
International Journal of Biotechnology (IJBT), Vol. 10, No. 1, 2008
Abstract: Low-frequency and high-intensity ultrasonic treatment of biosolid is a good method for biosolid disintegration. So, as a pre-treatment method of anaerobic digestion, it may replace the hydrolysis. Thus, we studied the effect of ultrasonic disintegration of biosolid at different ultrasonic power densities. Results showed that the Soluble Chemical Oxygen Demand (SCOD), Total Nitrogen (TN), Total Phosphorus (TP), supernatant protein, polysaccharide and Deoxyribonucleic Acid (DNA) concentrations and biosolid mass reduction increased with the increase of sonication time and energy density. Ultrasonic treatment at 1.6 W/m for 30 min when the degree of biosolid disintegration (DDCOD) was 49.29% increased the SCOD, TN, TP, supernatant protein, polysaccharide and DNA concentrations by 3285, 150.13, 68.50, 1488.85, 531.66 and 123.35 mg/L, respectively, indicating that ultrasonic treatment can effectively disintegrate the biosolid. Higher energy ultrasound was more efficient than lower energy ultrasound for biosolid treatment.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Biotechnology (IJBT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook