Microfiltration (MF) of centrifuged sugarcane juice was used as a pre-clarification step prior to further clarification. MF was performed with the objectives of achieving maximum flux, minimum retention of sucrose and maximum rejection of total solids as well as maximum removal of microorganisms from the permeate keeping the nutritional and physico-chemical profile intact. In this regard, experiments were done using a polyacrylonitrile-based MF membrane of filtration area 0.027 m² and pore size of 0.1 μm. A detailed investigation of the effects of different operating conditions, namely transmembrane pressure TMP (35, 69, 104 and 138 kPa) and cross flow velocity CFV (0.123, 0.246 and 0.369 m/s) on membrane productivity and juice quality was undertaken. The steady-state permeate flux ranged from 5.41 to 6.23 l/m²∙h for the domain of the operating conditions studied herein. Profiles of permeate flux and sucrose concentration in permeate were modeled using a gel layer controlling model under the framework of boundary layer analysis. The optimized operating conditions were found to be TMP of 104 kPa and CFV at 0.369 m/s, yielding a flux of 6.04 l/m²∙h and having sucrose and polyphenols concentration of 104.8 g/l and 9.38 mg GAE/100 ml, respectively. Total solids (26%) and turbidity (98%) were removed to a great extent during MF along with remarkable improvement of clarity (3 times). Microbiological evaluation confirmed that, MF successfully reduced the total viable plate count by 5 log CFU/mL scale and yeast and mold count by 4 log CFU/mL scale.

在进一步澄清之前，将离心的甘蔗汁的微滤（MF）用作预澄清步骤。MF的目标是获得最大的通量，最小的蔗糖保留率和最大的总固形物截留率，以及最大程度地从渗透物中去除微生物，从而保持营养和理化特性不变。在这方面，使用过滤面积为0.027m ²且孔径为0.1μm的基于聚丙烯腈的MF膜进行了实验。对跨膜压力TMP（35、69、104和138 kPa）和错流速度CFV（0.123、0.246和0.369 m / s）对膜生产率和果汁质量的影响进行了详细研究。稳态渗透通量范围为5.41至6.23 l / m在此研究的运行条件范围内为² ∙h。在边界层分析的框架下，使用凝胶层控制模型对渗透物通量和蔗糖中的蔗糖浓度进行了建模。发现最佳的操作条件是TMP为104 kPa，CFV为0.369 m / s，通量为6.04 l / m ² ∙h，蔗糖和多酚浓度为104.8 g / l，9.38 mg GAE / 100 ml，分别。在MF期间，总固形物（26％）和浊度（98％）被去除了很多，同时清晰度也得到了显着提高（3倍）。微生物学评估证实，MF成功地将总活板数减少了5 log CFU / mL量表，并将酵母菌和霉菌数减少了4 log CFU / mL量表。