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首页> 外文期刊>Environmental Science & Technology >Ultrafiltration/Nanofiltration for the Tertiary Treatment of Leather Industry Effluents
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Ultrafiltration/Nanofiltration for the Tertiary Treatment of Leather Industry Effluents

机译：超滤/纳滤用于皮革工业废水的三次处理

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摘要

Biologically treated effluents from the leather industry pose severe problems for the environment due in part to both the inorganic charge and the high nitrogen content associated with the organic charge. Pressure-driven membrane processes, namely ultrafiltrationanofiltration (UF/NF) technology, were investigated for their selective retention of the organics and permeation of the inorganic fraction. Permeation experiments were carried out with two model solutions representative of a treated tannery effluent UF and NF of these model solutions were assessed in terms of both their inorganic/organic fractionation capability and their permeation productivity. The UF membranes with MWCOs ranging from 10 000 to 1000 Da yield retentate streams enriched in organic compounds and permeate streams enriched in salts. Despite their high capacity for pure water permeation, they displayed low permeation fluxes, as the result of concentration polarization and fouling phenomena. NF 200 and NF 270 membranes associated fractionation capability with high permeation rates. Furthermore, these membranes demonstrated the highest permeate fluxes -30 kg/h/m~2 and 16 kg/h/m~2 for different model solutions, at the transmembrane pressure of 8 bar. Although these membranes had lower hydraulic permeabilities relative to the other membranes tested, they exhibited the best characteristics in terms of minimization of colloidal fouling.
机译：来自皮革工业的经过生物处理的废水对环境造成严重问题，部分原因是无机电荷和与有机电荷相关的高氮含量。研究了压力驱动膜工艺，即超滤/纳滤（UF / NF）技术对有机物的选择性保留和无机级分的渗透。用代表处理过的制革厂废水的两种模型溶液进行渗透实验，UF和这些模型溶液的NF均通过无机/有机分馏能力和渗透生产率进行了评估。 MWCO为10000至1000 Da的UF膜可产生富含有机化合物的截留物流和富含盐分的渗透物流。尽管它们具有高纯水渗透能力，但由于浓差极化和结垢现象，它们仍显示出较低的渗透通量。 NF 200和NF 270膜具有高渗透率的分馏能力。此外，在跨膜压力为8 bar的情况下，这些膜在不同模型溶液中表现出最高的渗透通量-30 kg / h / m〜2和16 kg / h / m〜2。尽管这些膜相对于其他测试膜具有较低的水力渗透性，但它们在胶体污垢最小化方面显示出最佳特性。

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  • 来源
    《Environmental Science & Technology》 |2009年第24期|9130-9135|共6页
  • 作者

    KATIA F. STREIT; JANE ZOPPAS FERREIRA; ANDREA M. BERNARDES; MARIA NORBERTA DE PINHO;

  • 作者单位

    Universidade Tecnica de Lisboa, Instituto Superior Tecnico (IST), Depto. De Engenharia Quimica e Biologica, Av. Rovisco Paes, 1 - 1049-001, Lisboa, Portugal Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pos-Graduacao em Engenharia de Minas, Metalurgica e de Materials (PPGEM), Av. Bento Goncalves, 9500, Porto Alegre/RS, Brasil;

    Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pos-Graduacao em Engenharia de Minas, Metalurgica e de Materials (PPGEM), Av. Bento Goncalves, 9500, Porto Alegre/RS, Brasil;

    Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pos-Graduacao em Engenharia de Minas, Metalurgica e de Materials (PPGEM), Av. Bento Goncalves, 9500, Porto Alegre/RS, Brasil;

    Universidade Tecnica de Lisboa, Instituto Superior Tecnico (IST), Depto. De Engenharia Quimica e Biologica, Av. Rovisco Paes, 1 - 1049-001, Lisboa, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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