Abstract

In this study, the effect of two membrane cleaning methods, such as aeration and addition of granular particles in a hybrid membrane photobioreactor (HMPBR) including Spirulina sp. with the concentration of 1.5 g·L⁻¹ was investigated. Three different spargers [i.e., different diameters of orifice (d_o): 0.5, 1, and 1.5 mm] and granular particles (i.e., three packing ratios of 0.5, 1, and 1.5%) were used. The results showed that with the increase in granular packing ratio, R_c/R_t decreased significantly. The best result was achieved by combining aeration with an orifice diameter of 1.5 mm and a granular packing ratio of 1.5%, which led to the lowest R_c/R_t value (0.38), while R_c/R_t value with a d_o of 1.5 mm was 0.68 without particles. In contrast, the ratio of pore blocking resistance to total resistance (R_p/R_t) increased by 4.2% under the combined application of 1.5 mm of orifice diameter and 1.5% of granular packing ratio. The results from protein concentrations in the cake layer showed that as the d_o became larger, cake protein concentration decreased by 40%, whereas increasing the granular packing ratio from 0.5 to 1.5% increased protein concentration by 60% in the cake layer.

摘要

在这项研究中，两种膜清洁方法的效果，例如在包括螺旋藻的混合膜光生物反应器 (HMPBR) 中通气和添加颗粒。研究了浓度为1.5 g·L ^{-1 。}使用了三种不同的分布器[即不同直径的孔口（d _o）：0.5、1 和1.5 毫米] 和颗粒状颗粒（即三种填充比0.5、1 和1.5%）。_{结果表明，随着颗粒}填充比的增加，Rc / Rt明显下降。孔径为 1.5 mm 的曝气和颗粒填充率为 1.5% 的组合曝气效果最好，这导致最低的R _c /R _t值（0.38），而在没有颗粒的情况下， d _o为 1.5 mm 的R _c / R _t值为0.68。相比之下，在1.5mm的孔口直径和1.5%的颗粒填充比的组合应用下，孔隙堵塞阻力与总阻力的比值( R _p / R _{t )增加了4.2%。}饼层中蛋白质浓度的结果表明，随着 d _o变大，饼层蛋白质浓度降低 40%，而将颗粒填充率从 0.5 增加到 1.5%，使饼层中蛋白质浓度增加 60%。