%0 Journal Article
%A WANG Jian
%A HU Shu-heng
%A ZHUO Sheng-jun
%A WANG Jia-quan
%T Experimental Investigation on Separating Algae from  Water  UsingMicro-nano Bubble Air Flotation Process
%D 2017
%R 10.11988/ckyyb.20160061
%J Journal of Yangtze River Scientific Research Institute
%P 20-23
%V 34
%N 4
%X Micro-nano bubble coagulation and air flotation process was adopted  to treat the fresh and stale algae-laden waters coming from the algae and water separation port of Tangxi River in Hefei. Effects of coagulant and air retention time on the  separation of algae and water were investigated. Through comparing the method  with pressurized dissolved-air flotation which is in operation at present in the separation port, experimental parameters of the best treatment effect were explored to achieve the optimal process conditions. Results showed that the optimal dosage of coagulant PAC  for fresh and stale algae-laden waters was  24 g/m<sup>3</sup> and 36 g/m<sup>3</sup>, respectively, and the optimum air retention time in floatation pool was  30 min and 40 min,respectively. The removal rates of total phosphorus(TP), total nitrogen (TN), chemical oxygen demand (COD) and suspended solids (SS) of fresh algae-laden water reached 96.50%, 53.10%, 85.70%, 99.00%, respectively. And the removal rates of TP, TN, COD and SS of stale algae-laden water reached 98.40%, 62.40%, 65.60%, 99.80%, respectively. The treatment effect of micro-nano bubble air flotation was better than that of pressurized dissolved-air flotation.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160061