Environ Sci Pollut Res DOI 10.1007/s11356-014-3889-1
RESEARCH ARTICLE
Eutrophic water purification efficiency using a combination of hydrodynamic cavitation and ozonation on a pilot scale Wei-Xin Li & Chuan-Dong Tang & Zhi-Lin Wu & Wei-Min Wang & Yu-Feng Zhang & Yi Zhao & Giancarlo Cravotto
Received: 26 June 2014 / Accepted: 19 November 2014 # Springer-Verlag Berlin Heidelberg 2014
Abstract This paper presents the purification of eutrophic water using a combination of hydrodynamic cavitation (HC) and ozonation (O3) at a continuous flow of 0.8 m3 h−1 on a pilot scale. The maximum removal rate of chlorophyll a using O3 alone and the HC/O3 combination was 62.3 and 78.8 %, respectively, under optimal conditions, where the ozone utilization efficiency was 64.5 and 94.8 % and total energy consumption was 8.89 and 8.25 kWh m−3, respectively. Thus, the removal rate of chlorophyll a and the ozone utilization efficiency were improved by 26.5 % and 46.9 %, respectively, by using the combined technique. Meanwhile, total energy consumption was reduced by 7.2 %. Turbidity linearly decreased with chlorophyll a removal rate, but no linear relationship exists between the removal of COD or UV254 and chlorophyll a. As expected, the suction– cavitation-assisted O3 exhibited higher energy efficiency than the extrusion–cavitation-assisted O3 and O3 alone methods. Keywords Hydrodynamic cavitation . Ozonation . Purification . Eutrophication . Chlorophyll a . Pilot scale Responsible editor: Angeles Blanco Foundation item International Science & Technology Cooperation Program of China: Research and Development of Package Technology on the Removal of Algae in Eutrophic Water by the Combination of Hydrodynamic Cavitation and Ozonation, 2010DFB93700. W.
RESEARCH ARTICLE
Eutrophic water purification efficiency using a combination of hydrodynamic cavitation and ozonation on a pilot scale Wei-Xin Li & Chuan-Dong Tang & Zhi-Lin Wu & Wei-Min Wang & Yu-Feng Zhang & Yi Zhao & Giancarlo Cravotto
Received: 26 June 2014 / Accepted: 19 November 2014 # Springer-Verlag Berlin Heidelberg 2014
Abstract This paper presents the purification of eutrophic water using a combination of hydrodynamic cavitation (HC) and ozonation (O3) at a continuous flow of 0.8 m3 h−1 on a pilot scale. The maximum removal rate of chlorophyll a using O3 alone and the HC/O3 combination was 62.3 and 78.8 %, respectively, under optimal conditions, where the ozone utilization efficiency was 64.5 and 94.8 % and total energy consumption was 8.89 and 8.25 kWh m−3, respectively. Thus, the removal rate of chlorophyll a and the ozone utilization efficiency were improved by 26.5 % and 46.9 %, respectively, by using the combined technique. Meanwhile, total energy consumption was reduced by 7.2 %. Turbidity linearly decreased with chlorophyll a removal rate, but no linear relationship exists between the removal of COD or UV254 and chlorophyll a. As expected, the suction– cavitation-assisted O3 exhibited higher energy efficiency than the extrusion–cavitation-assisted O3 and O3 alone methods. Keywords Hydrodynamic cavitation . Ozonation . Purification . Eutrophication . Chlorophyll a . Pilot scale Responsible editor: Angeles Blanco Foundation item International Science & Technology Cooperation Program of China: Research and Development of Package Technology on the Removal of Algae in Eutrophic Water by the Combination of Hydrodynamic Cavitation and Ozonation, 2010DFB93700. W.
