Febriasari Arifina, Ananto Annisa Hasna, Suhartini Meri, Kartohardjono Sutrasno
Chemical Engineering Department, Faculty of Engineering, Universitas Indonesia, Kampus UI, Depok 16424, Indonesia.
National Nuclear Energy Agency, Jl. Lebak Bulus Raya No. 49, Jakarta 12440, Indonesia.
Membranes (Basel). 2021 Jan 18;11(1):66. doi: 10.3390/membranes11010066.
Batik wastewater, in general, is colored and has high concentrations of BOD (biological oxygen demand), COD (chemical oxygen demand), and dissolved and suspended solids. Polysulfone (PSf)-based membranes with the addition of polyvinyl pyrrolidone (PVP) were prepared to treat batik industrial wastewater. PSf/PVP membranes were prepared using the phase inversion method with N-methyl-2 pyrrolidone (NMP) as the solvent. Based on the membrane characterization through FESEM, water contact angle, porosity, and mechanical tests showed a phenomenon where the addition of PVP provided thermodynamic and kinetic effects on membrane formation, thereby affecting porosity, thickness, and hydrophilicity of the membranes. The study aims to observe the effect of adding PVP on polysulfone membrane permeability and antifouling performance on a laboratory scale through the ultrafiltration (UF) process. With the addition of PVP, the operational pressure of the polysulfone membrane was reduced compared to that without PVP. Based on the membrane filtration results, the highest removal efficiencies of COD, TDS (total dissolved solid), and conductivity achieved in the study were 80.4, 84.6, and 83.6%, respectively, on the PSf/PVP 0.35 membrane operated at 4 bar. Moreover, the highest color removal efficiency was 85.73% on the PSf/PVP 0.25 operated at 5 bar. The antifouling performance was identified by calculating the value of total, reversible, and irreversible membrane fouling, wherein in this study, the membrane with the best antifouling performance was PSf/PVP 0.25.
一般来说，蜡染废水带有颜色，含有高浓度的生化需氧量（BOD）、化学需氧量（COD）以及溶解性和悬浮性固体。制备了添加聚乙烯吡咯烷酮（PVP）的聚砜（PSf）基膜来处理蜡染工业废水。采用相转化法，以N-甲基-2-吡咯烷酮（NMP）为溶剂制备了PSf/PVP膜。通过场发射扫描电子显微镜（FESEM）对膜进行表征，水接触角、孔隙率和力学测试表明，添加PVP对膜的形成产生了热力学和动力学效应，从而影响了膜的孔隙率、厚度和亲水性。该研究旨在通过超滤（UF）过程在实验室规模上观察添加PVP对聚砜膜渗透性和抗污染性能的影响。添加PVP后，聚砜膜的操作压力比未添加PVP时降低。基于膜过滤结果，在4 bar压力下运行的PSf/PVP 0.35膜在本研究中实现的COD、总溶解固体（TDS）和电导率的最高去除效率分别为80.4%、84.6%和83.6%。此外，在5 bar压力下运行的PSf/PVP 0.25膜的最高脱色效率为85.73%。通过计算总膜污染、可逆膜污染和不可逆膜污染的值来确定抗污染性能，在本研究中，抗污染性能最佳的膜是PSf/PVP 0.25。
