Abstract Treatment of real (RVORW) and synthetic (SVORW) vegetable oil refinery wastewaters using membrane filtration system was experimentally studied. Experimental runs with SVORW were used to identify the best conditions to perform with RVORW treatment. The bench-scale experiment was carried out using a commercial ceramic 0.245 m2 ultrafiltration (UF) membrane (150 kDa) in cross-flow filtration (CFF) mode at a flow rate of 3000 L⋅ h−1 and a trans-membrane pressure (TMP) of 1.2 bars. However, such membrane is vulnerable to fouling and it is insufficient to give water of good quality suitable for reuse. This investigation, aims to improve the purification performances of UF by exploring its combination with other treatment options, i.e. optimized coagulation/flocculation (CF) as pre-treatment and dead-end filtration (DEF) as post-treatment for better treated-water quality. According to the results, when using CF as pre-treatment under optimal conditions (2.4 g⋅L-1of aluminium sulfate, 60.05 mg⋅L-1 of CHT flocculant, under initial pH of 9.23), the hybrid CF/UF process allows to achieve the best treated RVORW water quality with turbidity, COD and TOC removals reaching 100 %, 98 % and 97 % respectively compared to those of CF and UF used separately, with membrane permeability of 135 L⋅ h−1⋅ m-2⋅ bar−1 which is in agreement with an industrial application.

中文翻译：

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混凝/絮凝-膜过滤混合工艺处理植物油精炼废水安全再利用和回收的效率

摘要 对使用膜过滤系统处理真正（RVORW）和合成（SVORW）植物油精炼废水进行了实验研究。使用 SVORW 进行的实验运行用于确定使用 RVORW 处理执行的最佳条件。使用商用陶瓷 0.245 m2 超滤 (UF) 膜 (150 kDa) 在错流过滤 (CFF) 模式下以 3000 L·h-1 的流速和跨膜压力 ( TMP) 为 1.2 小节。然而，这种膜容易结垢并且不足以提供适合再利用的优质水。本研究旨在通过探索超滤与其他处理方案的结合来提高超滤的净化性能，即 优化的混凝/絮凝 (CF) 作为预处理和死端过滤 (DEF) 作为后处理以获得更好的处理水质量。根据结果​​，在最佳条件下（2.4 g·L-1 硫酸铝，60.05 mg·L-1 CHT 絮凝剂，初始 pH 值为 9.23）使用 CF 作为预处理时，混合 CF/UF 工艺允许与单独使用 CF 和 UF 相比，获得最佳处理的 RVORW 水质，浊度、COD 和 TOC 去除率分别达到 100%、98% 和 97%，膜渗透率为 135 L⋅ h−1⋅ m-2⋅ bar -1 与工业应用一致。