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Vol. 26 No. 4 (2014): Vol 26 Issue 4

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Parameter Optimization of Ultrasound Technology for Algae Removal and its Application in Pengxi River of Three Gorges Reservoir

https://doi.org/10.14233/ajchem.2014.16125
Gongduan Fan
College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian Province, P.R. China
Zhi Zhang
Key Laboratory of the Three Gorges Reservoir Region's Eco-environment under the State Ministry of Education, Chongqing University, Chongqing 400045, P.R. China
Jing Luo
College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian Province, P.R. China
Qian Lin
College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian Province, P.R. China
Liru Chen
College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian Province, P.R. China

Corresponding Author(s) : Gongduan Fan

fgdfz@fzu.edu.cn; cqufgd@126.com

Asian Journal of Chemistry, Vol. 26 No. 4 (2014): Vol 26 Issue 4

Abstract

The effects on algae removal imposed by ultrasound technology employing different combinations of parameters, including frequency, power and irradiation time, were estimated using response surface methodology. This technology was applied in the backwater area of Pengxi river in the three Gorges Reservoirs. Results showed that, the algae removal rate by ultrasound was 64.1 %, at an optimal frequency of 45 kHz, input power of 60 W and irradiation time of 48 s. After 2 h of ultrasound irradiation on the 500 m2 study field, the algae density dropped from (1.10 ± 0.02) × 107 to (2.1 ± 0.1) × 106 cells/mL. Chlorophyll-a concentration dropped to 13.8 % of its initial amount algae were effectively controlled. Ultrasound technology is concluded to be effective for algae removal and can thus be applied to algal blooms.

Keywords

Algae removal Response surface design Ultrasound Water bloom
Fan, G., Zhang, Z., Luo, J., Lin, Q., & Chen, L. (2014). Parameter Optimization of Ultrasound Technology for Algae Removal and its Application in Pengxi River of Three Gorges Reservoir. Asian Journal of Chemistry, 26(4), 1165–1170. https://doi.org/10.14233/ajchem.2014.16125
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