Ceramic membrane performance in microfiltration of oily wastewater
Ceramic membrane performance in microfiltration of oily wastewater
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DOI：
10.1016/j.desal.2010.07.055
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发表时间：
2011-01-15
期刊：
影响因子：
9.9
通讯作者：
Mohammadi, Toraj
中科院分区：
文献类型：
--
作者：
Abadi, Sareh Rezaei Hosein;Sebzari, Mohammad Reza;Mohammadi, Toraj
大量含油废水是由工业来源产生的。水包油型乳状液是最严重的污染物，目前的处理技术往往成本高昂且效果不佳。近年来，膜法已被应用于含油废水的处理。微滤（MF）已成功地应用于水包油分离。在这项研究中，进行了调查，处理含油废水。采用管式陶瓷微滤（α-Al 2 O 3）系统处理德黑兰炼油厂API污水。该系统可产生符合国家排放标准的渗透液，含油量为4 mg/L，TOC去除率高于95%。此外，操作参数，如跨膜（TMP）的影响。考察了错流流速（CFV）和温度对膜通量、TOC去除率和膜污染阻力（FR）的影响。推荐的操作条件为TMP为1.25 bar，CFV为2.25 m/s，温度为32.5 ℃。在这个系统里。采用反冲洗去除堵塞膜孔的油滴和颗粒物，结果表明，反冲洗可显著防止膜通量的下降。根据研究结果，提出了用传统的废水处理方法来代替该系统。(C)2010年爱思唯尔。All rights reserved.
A large amount of oily wastewaters is generated by industrial sources. Oil-in-water emulsions are the most serious pollutants for which current treatment technologies are often costly and ineffective. In recent years, membrane processes have been applied for oily wastewater treatment. Microfiltration (MF) was successfully used in oil-in-water separations. In this research, investigations were carried out for treatment of an oily wastewater. A tubular ceramic MF (alpha-Al2O3) system was employed for treatment of a typical oily wastewater comes from API effluent of Tehran refinery. This system could produce a permeate with oil and grease content of 4 mg/L that meets the National Discharge Standard and exhibited TOC removal efficiency higher than 95%. Also, effects of operating parameters such as transmembrane (TMP). cross flow velocity (CFV) and temperature on permeate flux, TOC removal efficiency and fouling resistance (FR) were investigated. The recommended operating conditions are TMP of 1.25 bar, CFV of 2.25 m/s and temperature of 32.5 degrees C. In this system. backwashing was used to remove oil droplets and particulates that block the membrane pores, and the results showed that backwashing could prevent permeate flux decline significantly. Based on the results, this system was proposed to be replaced with the conventional wastewater treatment method. (C) 2010 Elsevier By. All rights reserved.