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Effects of Flocculant Concentration and Temperature on the Membrane Separation Process in Microalgal Suspensions
Chemical Engineering & Technology ( IF 2.1 ) Pub Date : 2021-11-23 , DOI: 10.1002/ceat.202100490
Thiago Nishimura 1 , Giuliana Varela Garcia Lesak 2 , Lorenna Alves Xavier 2 , Rafael Bruno Vieira 3 , André Bellin Mariano 4
Affiliation  

By using different flocculant concentrations and temperatures with a tannin-based flocculant, chitosan, and ferric chloride, the performance of a combined flocculation and membrane separation process in microalgal suspensions was evaluated. Permeate flux experiments were conducted for 30 min, and the effects of the flocculant concentration and temperature were analyzed. The zeta potential of the culture with and without flocculant approached zero with increasing temperature, in favor of microalgal cell agglomeration. At 40 °C, crossflow microfiltration showed a 27 % improvement in the permeate flux compared to 20 °C. Overall, the results showed a significant potential use of flocculants with increasing temperature, by providing considerably higher permeated fluxes.

中文翻译:

絮凝剂浓度和温度对微藻悬浮液膜分离过程的影响

通过使用不同浓度和温度的单宁絮凝剂、壳聚糖和氯化铁,评估了微藻悬浮液中联合絮凝和膜分离过程的性能。渗透通量实验进行了30 min,分析了絮凝剂浓度和温度的影响。随着温度的升高,有和没有絮凝剂的培养物的 zeta 电位接近于零,有利于微藻细胞聚集。在 40 °C 时,与 20 °C 相比,错流微滤的渗透通量提高了 27%。总体而言,结果表明,随着温度的升高,絮凝剂具有显着的潜在用途,因为它提供了相当高的渗透通量。
更新日期:2021-11-23
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