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首页> 外文期刊>Journal of Hazardous Materials >Reuse of olive mill effluents from two-phase extraction process by integrated advanced oxidation and reverse osmosis treatment
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Reuse of olive mill effluents from two-phase extraction process by integrated advanced oxidation and reverse osmosis treatment

机译：通过先进的氧化和反渗透综合处理法对两阶段提取过程中的橄榄磨废水进行再利用

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摘要

In this work, complete reclamation of the olive mill effluents coming from a two-phase olive oil extraction process (OME-2) was studied on a pilot scale. The developed depuration procedure integrates an advanced oxidation process based on Fenton's reagent (secondary treatment) coupled with a final reverse osmosis (RO) stage (purification step). The former aims for the removal of the major concentration of refractory organic pollutants present in OME-2, whereas the latter provides efficient purification of the high salinity. Complete physicochemical composition of OME-2 after the secondary treatment was examined, including the particle size distribution, organic matter gradation and bacterial growth, in order to assess the selection of the membrane and its fouling propensity. Hydrodynamics and selectivity of the membrane were accurately modelized. Upon optimization of the hydrodynamic conditions, the RO membrane showed stable performance and fouling problems were satisfactorily overcome. Steady-state permeate flux equal to 21.1 Lh~(-1) m~(-2) and rejection values up to 99.1% and 98.1% of the organic pollutants and elec-troconductivity were respectively attained. This ensured parametric values below standard limits for reuse of the regenerated effluent, e.g. in the olives washing machines, offering the possibility of closing the loop and thus rending the production process environmentally friendly.
机译：在这项工作中，以中试规模研究了来自两阶段橄榄油提取工艺（OME-2）的橄榄磨机废水的完全回收。研发的净化程序结合了基于Fenton试剂的先进氧化工艺（二级处理）以及最终的反渗透（RO）阶段（净化步骤）。前者旨在去除OME-2中存在的主要浓度的难降解有机污染物，而后者则提供了对高盐度的有效净化。在二次处理后，检查了OME-2的完整理化组成，包括粒径分布，有机物分级和细菌生长，以评估膜的选择及其结垢倾向。膜的流体动力学和选择性进行了精确建模。在优化流体力学条件后，反渗透膜表现出稳定的性能，并且令人满意地克服了结垢问题。稳态渗透通量等于21.1 Lh〜（-1）m〜（-2），截留率分别达到有机污染物的99.1％和98.1％。这样可确保参数值低于标准限值，以使再生出水再利用，例如：在橄榄洗衣机中使用，可以关闭回路，从而使生产过程对环境友好。

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