Lei Yu, Long Tian-yu, San Lei, An Qiang, Huang Ning-qiu
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
Huan Jing Ke Xue. 2013 May;34(5):1761-6.
Through a self-designed vertically oscillating grid experiment device, the experiment was carried out to research the effects of the turbulence fluctuation intensity on the growth of algae and water environment in the water with adequate nutrients by changing the vibration frequency under a certain light and temperature conditions. The results showed that: the turbulent fluctuation has significant effects on algae growing that weak turbulence fluctuation can promote the growth of algae and strong turbulence fluctuation will inhibit the growth of algae in the range of experimental level. With the increase of the turbulent fluctuation intensity, the peak of algal biomass gradually delayed. Changes of nitrogen and phosphorus in the experimental process have significant differences, when the vibration frequency was up to 2.0 Hz, the maximum reduction of TN and TP were 55.2% and 69.0% lower compared with 0.5 Hz, which was closely associated with the growth of algae. With the intensity of turbulent fluctuation increases, nitrogen-phosphorus ratio first increases and then decreases corresponding to the peak of the algal biomass. Turbulent fluctuation can promote the pH and, dissolved oxygen quickly adjusted to the level of algae growing required, and the most appropriate value remains unchanged.
通过自行设计的垂直振荡格栅实验装置，在一定光照和温度条件下，通过改变振动频率，研究了湍流脉动强度对富营养化水体中藻类生长及水环境的影响。结果表明：在实验水平范围内，湍流脉动对藻类生长有显著影响，弱湍流脉动可促进藻类生长，强湍流脉动则抑制藻类生长。随着湍流脉动强度的增加，藻类生物量峰值逐渐延迟。实验过程中氮、磷变化存在显著差异，当振动频率达到2.0 Hz时，总氮（TN）和总磷（TP）的最大降幅分别比0.5 Hz时低55.2%和69.0%，这与藻类生长密切相关。随着湍流脉动强度增加，氮磷比先增大后减小，对应藻类生物量峰值。湍流脉动可促进pH值和溶解氧快速调整到藻类生长所需水平，且最适宜值保持不变。
