Algal Control by Low-Frequency, Low-Power Ultrasonic in Eutrophic Water Bodies

Abstract:

Ultrasonic cavitations can control algal growth. Considering water ecosystem protection and characteristics of ultrasonic technology, low frequency and low power ultrasonic was especially suitable to control algal growth in water bodies. Effects of low-frequency and low-power ultrasonic irradiation on natural blend algal growth were investigated. The algae spices were collected from a fresh water body. It mainly consists of Cyanophyta, Bacillariophyta and Chlorophyta. The results showed that ultrasonic irradiation with frequency of 60KHz, power of 0.24W/cm² and irradiation time of 1min, inhibited algal growth significantly. Inhibition of ultrasonic irradiation on algal growth enhanced with ultrasonic power increased. Inhibition did not increase again When ultrasonic power exceeds 0.24W/cm². The effect of algal control was sustainable by ultrasonic irradiation with interval period of 2-4 days.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 811-816
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.811
• Online since: January 2012
• Authors: Deng Ling Jiang, Guo Wei Ni, Yu Min Zhang, You Po Su
• Keywords: Algal Control, Interval Period, Low Frequency, Low Power, Ultrasonic

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