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Performance Modeling and Cost Analysis of a Pilot-Scale Reverse Osmosis Process for the Final Purification of Olive Mill Wastewater

机译:橄榄工厂废水最终净化中试反渗透过程的性能建模和成本分析

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摘要

A secondary treatment for olive mill wastewater coming from factories working with the two-phase olive oil production process (OMW-2) has been set-up on an industrial scale in an olive oil mill in the premises of Jaén (Spain). The secondary treatment comprises Fenton-like oxidation followed by flocculation-sedimentation and filtration through olive stones. In this work, performance modelization and preliminary cost analysis of a final reverse osmosis (RO) process was examined on pilot scale for ulterior purification of OMW-2 with the goal of closing the loop of the industrial production process. Reduction of concentration polarization on the RO membrane equal to 26.3% was provided upon increment of the turbulence over the membrane to values of Reynolds number equal to 2.6 × 104. Medium operating pressure (25 bar) should be chosen to achieve significant steady state permeate flux (21.1 L h−1 m−2) and minimize membrane fouling, ensuring less than 14.7% flux drop and up to 90% feed recovery. Under these conditions, irreversible fouling below 0.08 L h2 m2 bar1 helped increase the longevity of the membrane and reduce the costs of the treatment. For 10 m3 day−1 OMW-2 on average, 47.4 m2 required membrane area and 0.87 € m−3 total costs for the RO process were estimated.
机译:在哈恩(西班牙)的一家橄榄油厂中,已经进行了工业规模的二级处理,该二级处理来自采用两阶段橄榄油生产工艺(OMW-2)的工厂生产的橄榄油厂废水。二级处理包括类Fenton氧化,然后进行絮凝沉淀和橄榄石过滤。在这项工作中,对最终反渗透(RO)过程的性能建模和初步成本分析在中试规模上进行了检查,以期对OMW-2进行进一步纯化,目的是封闭工业生产过程的环路。当膜上的湍流增加到雷诺数等于2.6×10 4 时,RO膜上的浓度极化降低了26.3%。应选择中等工作压力(25 bar),以实现显着的稳态渗透通量(21.1 L h -1 m -2 )并最大程度地减少膜污染,确保低于14.7 %的助焊剂下降和高达90%的进料回收率。在这些条件下,低于0.08 L h - 2 m - 2 bar - 1 帮助提高膜的寿命并降低治疗费用。对于平均10 m 3 -1 OMW-2,需要47.4 m 2 所需的膜面积,而0.87€m −3 < / sup>估算了RO过程的总成本。

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