提水曝气器减少分层饮用水库中的藻类生长：藻类代谢分析和工程应用的新见解。
Water-lifting aerator reduces algal growth in stratified drinking water reservoir: Novel insights into algal metabolic profiling and engineering applications.
机构信息
Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Xi'an Key Laboratory of Water Source and Water Quality Guarantee, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Xi'an Key Laboratory of Water Source and Water Quality Guarantee, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
出版信息
Environ Pollut. 2020 Nov;266(Pt 1):115384. doi: 10.1016/j.envpol.2020.115384. Epub 2020 Aug 12.
Water-lifting aerator (WLA) which was developed by Professor Tinglin Huang at Xi'an University of Architecture and Technology, China has multi-functional water quality improvement that significantly inhibits the occurrence of harmful algal blooms (HABs) in deep drinking water reservoirs. However, the biological mechanism of WLA to the suppress algal growth has not been comprehensively understood. Here, the cellular mechanism that allows WLA to control HABs was explored based on the combination of both laboratory simulation and field investigation. Under simulated hydrodynamic conditions, the results showed that the cell density, chlorophyll a content, chlorophyll fluorescence parameters, and dehydrogenase activity in Microcystis aeruginosa all peaked under light conditions at 25 °C. The metabolic activity of M. aeruginosa varied significantly under low temperature at 6 °C and light conditions when cultured for 48 h. The extracellular organic matter (EOM) and intracellular organic matter (IOM) contents of M. aeruginosa were both resolved into three components. Moreover, the total fluorescence intensities from EOM and IOM both peaked under light conditions at 25 °C. The field investigation showed that the growth of algae was decreased significantly in Lijiahe drinking water reservoir with WLA application. The chlorophyll fluorescence parameters decreased significantly after vertical mixing, thereby indicating that the WLA weakened the photosynthetic ability and reduced the biological activity of algae in situ. In addition, the WLA significantly affected the vertical distribution of the phytoplankton community composition. Altogether, these results shed new lights on understanding the control of algal blooms by WLA in stratified drinking water reservoirs. WLA has broad prospect of engineering applications, which can control algal blooms of water supply resources in situ, therefore, reduce the content of disinfection by-products in drinking water treatment plants.
中国西安建筑科技大学黄廷林教授开发的扬水曝气器（WLA）具有多功能水质改善作用，可显著抑制深水库中有害藻类的爆发（HABs）。然而，WLA 抑制藻类生长的生物学机制尚未得到全面理解。在这里，结合实验室模拟和野外调查，探讨了 WLA 控制 HABs 的细胞机制。在模拟水动力条件下，结果表明，在 25°C 的光照条件下，铜绿微囊藻的细胞密度、叶绿素 a 含量、叶绿素荧光参数和脱氢酶活性均达到峰值。在 6°C 低温和光照条件下培养 48 小时时，铜绿微囊藻的代谢活性变化显著。铜绿微囊藻的胞外有机物（EOM）和胞内有机物（IOM）含量均分为三个组分。此外，EOM 和 IOM 的总荧光强度均在 25°C 的光照条件下达到峰值。野外调查表明，在李家河饮用水库应用 WLA 后，藻类的生长明显减少。垂直混合后叶绿素荧光参数显著降低，表明 WLA 减弱了藻类的光合作用能力，降低了藻类的原位生物活性。此外，WLA 显著影响了浮游植物群落组成的垂直分布。总之，这些结果为理解 WLA 在分层饮用水库中控制藻类爆发提供了新的思路。WLA 具有广阔的工程应用前景，可以原位控制供水资源的藻类爆发，从而降低饮用水处理厂消毒副产物的含量。
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