Buoy-bead flotation (BBF) technology used low density hollow microspheres instead of air bubbles to harvest microalgae with high efficiency and low energy consume. Chlorella vulgaris (common energy microalgae) and sodium borosilicate glass microspheres were chosen as experimental microalgae and cenospheres in BBF process. BBF method was compared with traditional dissolved air flotation method. Response surface methodology was used to optimize the process of BBF method. The results showed that the flotation rate with sodium borosilicate was ideal. Microspheres particle size, concentration and stirring speed had significant influence on flotation rate. The rate could be 83.7% under the conditions of particle size 56 ?m, particle concentration 0.546 g/L and stirring speed 133 r/min.
Xiaotong ZOU Kaiwei XU Hao WEN Xiangying REN Zhou SHEN Yanpeng LI
. Novel method of buoy-bead flotation for harvesting micro-algae and its performance[J]. The Chinese Journal of Process Engineering, 2018
, 18(4)
: 872
-878
.
DOI: 10.12034/j.issn.1009-606X.217377
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