Reducing harmful algae in raw water by light-shading |
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| Authors: | Xue-Chu Chen Hai-Nan Kong Sheng-Bing He De-Yi Wu Chun-Jie Li Xiao-Chen Huang |
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| Institution: | 1. School of Environmental Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, PR China;2. Shanghai East Sea Marine Engineering Survey & Design Institute, Shanghai 200137, PR China |
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| Abstract: | The occurrence of harmful algal bloom in water source poses a serious water safety problem to local water supply systems. In order to ensure the raw water quality, the feasibility of an in situ light-shading measure was investigated through enclosure experiment and pilot-scale experiment. The results showed that harmful algal bloom could be controlled by light-shading lasting for 6–9 days, with water quality being partially improved. When aeration was added, the reduction of algal biomass could be enhanced, and water quality was further improved compared to that without aeration. These experimental results offered an attractive in situ algal control measure for lakes or reservoirs suffered from harmful algal bloom. |
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