Environ Technol. 2014 Mar-Apr;35(5-8):681-90. doi: 10.1080/09593330.2013.841293.
The objectives of this investigation were to perform a series of lab-scale membrane separation experiments under various operating conditions to investigate the performance behaviour of nanofiltration membrane (NF 270) for wastewater reuse from the wood-panels industry. The operating condition effects, e.g. cross-flow velocity (CFV), trans membrane pressure (TMP) and temperature, on the permeate flux and contaminant rejection efficiency were investigated. Moreover, three different samples: (1) raw wastewater collected from the wood-panels industry; (2) ultrafiltration pre-treated wastewater (UF-NF); and (3) coagulation/flocculation pre-treated wastewater (CF-NF) were employed in this study. The UF-NF was proposed as a pre-treatment process because it could reduce the chemical oxygen demand (COD) effectively with lower energy consumption than CF-NF. The performance of NF 270 membrane was assessed by measurements of the many parameters (pH, conductivity, total dissolved solids, COD, suspended solids, total nitrogen, nitrite, nitrate, and total phosphate) under various operating conditions. It was noted that the contaminant rejection was affected by changing TMP and CFV. It was concluded that the purified water stream can be recycled into the process for water reuse or safely disposed to the river.
本研究的目的是在各种操作条件下进行一系列实验室规模的膜分离实验，以研究纳滤膜（NF270）用于木材板工业废水再利用的性能行为。考察了操作条件（如错流速度（CFV）、跨膜压力（TMP）和温度）对渗透通量和污染物去除效率的影响。此外，本研究采用了三种不同的样品：（1）从木材板工业收集的原始废水；（2）超滤预处理废水（UF-NF）；和（3）混凝/絮凝预处理废水（CF-NF）。UF-NF 被提议作为预处理工艺，因为与 CF-NF 相比，它可以有效地降低化学需氧量（COD），且能耗更低。通过在各种操作条件下测量许多参数（pH 值、电导率、总溶解固体、COD、悬浮物、总氮、亚硝酸盐、硝酸盐和总磷酸盐）来评估 NF270 膜的性能。结果表明，污染物去除率受 TMP 和 CFV 的变化影响。结论是，净化后的水流可以回收再用于工艺中的水再利用，或安全地排放到河流中。
