Xie, Beizhen Improvement of the activity of anaerobic sludge by low-intensity ultrasound. [electronic resource] - Journal of environmental management Jan 2009 - 260-4 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0301-4797 Standard No.: 10.1016/j.jenvman.2007.09.004 doi Subjects--Topical Terms: AnaerobiosisEquipment DesignRiboflavin--analogs & derivativesSewage--analysisUltrasonics