Kiran S Aditya, Arthanareeswaran G, Thuyavan Y Lukka, Ismail A F
Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, India.
Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, India.
Ecotoxicol Environ Saf. 2015 Nov;121:186-92. doi: 10.1016/j.ecoenv.2015.04.001. Epub 2015 Apr 11.
In this study, modified polyethersulfone (PES) and cellulose acetate (CA) membranes were used in the treatment of car wash effluent using ultrafiltration. Hydrophilic sulfonated poly ether ether ketone (SPEEK) and bentonite as nanoclay were used as additives for the PES and CA membrane modification. Performances of modified membranes were compared with commercial PES membrane with 10kDa molecular weight cut off (MWCO). The influencing parameters like stirrer speed (250-750rpm) and transmembrane pressure (100-600kPa) (TMP) were varied and their effects were studied as a function of flux. In the treatment of car wash effluent, a higher permeate flux of 52.3L/m(2)h was obtained for modified CA membrane at TMP of 400kPa and stirrer speed of 750rpm. In comparison with modified PES membrane and commercial PES membrane, modified CA membranes showed better performance in terms of flux and flux recovery ratio. The highest COD removal (60%) was obtained for modified CA membrane and a lowest COD removal (47%) was observed for commercial PES membrane. The modified membranes were better at removing COD, turbidity and maintained more stable flux than commercial PES membrane, suggesting they will provide better economic performance in car wash effluent reclamation.
在本研究中，采用改性聚醚砜（PES）和醋酸纤维素（CA）膜，通过超滤处理洗车废水。将亲水性磺化聚醚醚酮（SPEEK）和作为纳米黏土的膨润土用作PES和CA膜改性的添加剂。将改性膜的性能与截留分子量为10kDa的商用PES膜进行比较。改变诸如搅拌速度（250 - 750rpm）和跨膜压力（100 - 600kPa）（TMP）等影响参数，并研究它们作为通量函数的影响。在处理洗车废水时，在400kPa的TMP和750rpm的搅拌速度下，改性CA膜获得了52.3L/m²·h的较高渗透通量。与改性PES膜和商用PES膜相比，改性CA膜在通量和通量回收率方面表现出更好的性能。改性CA膜的化学需氧量（COD）去除率最高（60%），而商用PES膜的COD去除率最低（47%）。与商用PES膜相比，改性膜在去除COD、浊度方面表现更好，并且通量更稳定，这表明它们在洗车废水回收利用中将具有更好的经济性能。
