Koyuncu Ismail
Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 80626 Maslak, Istanbul, Turkey.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2002 Aug;37(7):1347-59. doi: 10.1081/ese-120005991.
This paper presents the pilot scale membrane separation studies on the Elmali Lake raw water in Istanbul, which is highly polluted by discharging of sewage waters. Low pressure nanofiltration (NF) and reverse osmosis (LPRO) membranes having the surface area of 2 m2 have been used during the experimental runs. Experiments were conducted at different pressures, temperature and pH ranges. Feed flow rate was about 300 L/h. As a result, flux values increased linearly with increasing pressure. Ammonia and nitrate ion rejections also increased with increasing pressure and characteristics of rejection were similar for the both types of membranes. Permeate flux value increased proportionally with the temperature. The temperature changing has also influenced the rejection rate of ammonia and nitrate ions. Both ammonia and nitrate ion rejections at neutral pH values were very high. Therefore, neutral pH value is suitable for TFC-S and TFC-HR membranes to remove ammonia and nitrate ions.
本文介绍了对伊斯坦布尔埃尔马利湖原水进行的中试规模膜分离研究，该湖水因污水排放而受到严重污染。实验过程中使用了表面积为2平方米的低压纳滤（NF）膜和低压反渗透（LPRO）膜。实验在不同压力、温度和pH范围内进行。进料流速约为300升/小时。结果表明，通量值随压力增加呈线性增加。氨和硝酸根离子截留率也随压力增加而增加，两种膜的截留特性相似。渗透通量值与温度成正比增加。温度变化也影响了氨和硝酸根离子的截留率。中性pH值下氨和硝酸根离子的截留率都非常高。因此，中性pH值适合TFC-S和TFC-HR膜去除氨和硝酸根离子。
