• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Application of microfiltration and ultrafiltration processes to cork processing wastewaters and assessment of the membrane fouling
【24h】

Application of microfiltration and ultrafiltration processes to cork processing wastewaters and assessment of the membrane fouling

机译：微滤和超滤工艺在软木工艺废水中的应用和膜污染评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The filtration of wastewaters generated in the cork industrial process is investigated by using three membranes in tangential filtration laboratory equipment.The three membranes used were two microfiltration membranes with pores sizes of 0.65 and 0.1 mu m (DUR-0.65 and DUR-0.1 membranes),and a ultrafiltration membrane with a molecular weight cut-off of 300 kDa (BIO-300K membrane).The water hydraulic permeability was determined for each membrane (values of 860,248 and 769 L h~(-1) m~(-2) bar~(-1) were found),and the influence on the permeate flux of the main operating variables,such as transmembrane pressure,feed flow rate,temperature and nature of the membranes,was established.The effectiveness of the different membranes and operating conditions was evaluated by determining the removal obtained for several parameters which measure the global pollutant content of the effluent:COD,absorbance at 254 nm,tannic content,color and ellagic acid,which is selected as a major model pollutant among the different organic compounds present in this wastewater.The values of the corresponding retention coefficients depended on the operating conditions,but in all cases were in the sequence:ellagic acid and color > absorbance at 254 nm > tannic content > COD.Globally,the higher removals were obtained for the BIO-300K membrane at 20 deg C,with Q_F = 5.3Lh~(-1) andTMP= 1.8 bar.Finally,the fouling of the membranes was assessed,and the corresponding mechanism for each membrane was established by fitting the experimental data to various filtration fouling models reported in the literature.
机译：在切向过滤实验室设备中使用三层膜研究了软木工业过程中产生的废水的过滤。所用的三层膜是两块孔径为0.65和0.1μm的微滤膜（DUR-0.65和DUR-0.1膜），截留分子量为300 kDa的超滤膜（BIO-300K膜）。测定每种膜的水渗透率（值860,248和769 L h〜（-1）m〜（-2）bar （〜（-1）），并确定了主要操作变量对渗透通量的影响，例如跨膜压力，进料流速，膜的温度和性质。不同膜的有效性和操作条件通过确定用于测量废水总污染物含量的几个参数来评估废水的去除率：COD，254 nm吸光度，单宁含量，颜色和鞣花酸，被选为主要模型污染物废水中存在的不同有机化合物。相应的保留系数的值取决于操作条件，但在所有情况下都依次为：鞣花酸和颜色> 254 nm处的吸光度>单宁含量> COD。 BIO-300K膜在20℃，Q_F = 5.3Lh〜（-1）和TMP = 1.8 bar的条件下具有更高的去除率。最后，评估了膜的结垢情况，并通过以下方法建立了每种膜的相应机理使实验数据适合文献报道的各种过滤结垢模型。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号