Chemical Engineering Department, UniversitiTeknologi PETRONAS, Bandar Seri Iskandar, 32610 Perak, Malaysia.
Chemical Engineering Department, UniversitiTeknologi PETRONAS, Bandar Seri Iskandar, 32610 Perak, Malaysia; Jurusan Pendidikan Kimia, Institut Keguruan Ilmu Pendidikan, Jalan Pemuda No 59A, Mataram, Indonesia.
Bioresour Technol. 2017 Oct;241:661-668. doi: 10.1016/j.biortech.2017.05.175. Epub 2017 Jun 1.
Microalgae harvesting using membrane technology is challenging because of its high fouling propensity. As an established fouling mitigation technique, efficacy of air bubbles can be improved by maximizing the impact of shear-rates in scouring foulant. In this study, it is achieved by tilting the membrane panel. We investigate the effect of tilting angle, switching period as well as aeration rate during microalgal broth filtration. Results show that higher tilting angles (up to 20°) improve permeability of up to 2.7 times of the vertical panel. In addition, operating a one-sided panel is better than a two-sided panel, in which the later involved switching mode. One-sided membrane panel only require a half of area, yet its performance is comparable with of a large-scale module. This tilted panel can lead to significant membrane cost reductions and eventually improves the competitiveness of membrane technology for microalgae harvesting application.
微藻的膜技术收获是具有挑战性的，因为它具有很高的污染倾向。气泡作为一种成熟的防污技术，可以通过最大程度地提高冲刷污垢的剪切速率来提高其效果。在这项研究中，通过倾斜膜片来实现这一点。我们研究了倾斜角度、切换周期以及微藻培养液过滤过程中的曝气率对膜片的影响。结果表明，更高的倾斜角度（最高可达 20°）可将渗透性提高到垂直膜片的 2.7 倍。此外，单侧膜片的操作效果优于双侧膜片，因为后者涉及切换模式。单侧膜片只需要一半的面积，但其性能与大型模块相当。这种倾斜的膜片可以显著降低膜成本，最终提高膜技术在微藻收获应用中的竞争力。
