水动力条件下蓝藻水华生消的模拟实验研究与探讨

蓝藻水华是当今世界共同面临的重大水污染问题之一。通过室内模拟实验,在温度、光照、初始pH值和营养盐等基本条件相同的前提下模拟水流流速分别为10cm/s、20cm/s、30cm/s、40cm/s时铜绿微囊藻(Microcystis aeruginosa)水华的产生与消亡过程,在10～40cm/s流速区间里藻类生长周期随流速增大而变长,藻类最大现存量在40cm/s流速下最大,在10cm/s流速下最小,流速为30cm/s时藻类比增率最大,较适合藻类生存,在整个水华暴发过程中水体氮磷营养浓度呈下降趋势,水体的pH、DO和Ec变化不大。

Study on the Effect of Hydrodynamic Conditions on the Occurrence and Disappearance of Cyanobacteria Bloom

Cyanobacteria bloom is one of the most serious water pollution problems in current period.In this paper,the occurrence and disappearance regulation of Microcystis aeruginosa under different hydrodynamic conditions is studied.By laboratory experiments,the process of occurrence and disappearance of Microcystis aeruginosa bloom is simulated with the velocity of the flow corresponds to 10 cm/s,20 cm/s,30 cm/s and 40 cm/s under the same basic experimental condition of water temperature,illumination,initial pH an...