| Disinfection of wastewater using a 20-kHz ultrasound unit. | |
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MedLine Citation:
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PMID: 12043973 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study explored the application of a 20-kHz ultrasound unit for the disinfection of domestic wastewater. Experiments were conducted in batch with an ultrasound probe. The disinfection efficiency of fecal coliform increased with ultrasound power input from 0.003 log kill/min at 70 W/L to 1.8 log kill/min at 1250 W/L. Disinfection data are well-described by the Chick-Watson disinfection model (coefficient of dilution, n = 2.0) using ultrasound power in place of chemical concentration. Water quality did not affect disinfection efficiency significantly. Temperature increases experienced with ultrasonic treatment were significant. Attempts to control the temperature resulted in a marked decrease in disinfection efficiency. Experiments devised to quantify the role of thermal mechanisms revealed that of the total kill produced by ultrasound approximately 52% was attributed to heat, 36% to mechanical stresses associated with ultrasonically induced cavitation, and 12% to uncharacterized synergistic effects. Successful scale-up was demonstrated using a 9.3-L pilot-scale ultrasound unit, operated under flow-through conditions. |
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Authors:
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Bethany A Madge; James N Jensen |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Water environment research : a research publication of the Water Environment Federation Volume: 74 ISSN: 1061-4303 ISO Abbreviation: Water Environ. Res. Publication Date: 2002 Mar-Apr |
Date Detail:
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Created Date: 2002-06-04 Completed Date: 2002-11-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9886167 Medline TA: Water Environ Res Country: United States |
Other Details:
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Languages: eng Pagination: 159-69 Citation Subset: IM |
Affiliation:
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Department of Civil, Structural and Environmental Engineering, University of Buffalo, NY 14260, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Enterobacteriaceae
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isolation & purification Quality Control Temperature Ultrasonics* Waste Disposal, Fluid / methods* Water Movements Water Purification / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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