采用上下折流挡板增强闪光效果，提高养殖池中的微藻生长。
Enhanced flashing light effect with up-down chute baffles to improve microalgal growth in a raceway pond.
机构信息
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
出版信息
Bioresour Technol. 2015 Aug;190:29-35. doi: 10.1016/j.biortech.2015.04.050. Epub 2015 Apr 22.
Novel up-down chute baffles that sequentially generate clockwise and anticlockwise liquid vortexes were developed to increase vertical liquid velocity between the bottom dark area and the top light area in a raceway pond. The vertical liquid velocity, mixing time, and mass transfer coefficient were measured as functions of paddlewheel speed and air aeration rate by using a particle imaging velocimeter, pH probes, and dissolved oxygen probes. The up-down chute baffles decreased the liquid mixing time and increased the mass transfer coefficient by 41% and 25%, respectively. Besides, the vertical liquid velocity increased from ∼0.5cm/s to ∼6.1cm/s. As a result, the dark-light cycle period was reduced to 1/12. This enhanced flashing light effect with up-down chute baffles increased biomass yield by 32.6% in the same raceway pond.
新型上下倾斜导叶挡板可依次产生顺时针和逆时针液体涡流，旨在增加养殖池底层暗区和顶层亮区之间的垂直液体速度。通过使用粒子成像测速仪、pH 探头和溶解氧探头，测量了桨轮速度和空气充气率作为函数的垂直液体速度、混合时间和传质系数。上下倾斜导叶挡板分别将液体混合时间和传质系数降低了 41%和 25%。此外，垂直液体速度从约 0.5cm/s 增加到约 6.1cm/s。结果，明暗循环周期缩短至 1/12。在相同的养殖池中，这种具有上下倾斜导叶挡板的增强闪光效果使生物量产量提高了 32.6%。
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