caa a22 4500 60617009X CHVBK 20210128100715.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10098-015-0971-4 doi (NATIONALLICENCE)springer-10.1007/s10098-015-0971-4 Treating complex industrial wastewater in a new membrane-integrated closed loop system for recovery and reuse [Elektronische Daten] [Ritwik Thakura, Sankha Chakrabortty, Parimal Pal] A membrane-integrated continuous system was designed with new orientation of the membrane modules and investigated for treatment of industrial wastewater using forward osmosis (FO) in the upstream and nanofiltration in the recovery stage. Effects of applied pressure, cross-flow rate of feed water, variations of draw solution concentration and the run time on effectiveness of the system in separation and yield of pure water flux were studied in a continuous scheme in the context of pharmaceutical wastewater being a very complex system. Polyamide composite membranes out of a given lot were screened for application in FO and draw solute recovery stages. Two draw solutions in different concentrations (made of NaCl and MgSO4) were examined, where 0.5M NaCl was found to be the best one for the FO stage. During investigation with pharmaceutical wastewater, more than 97% purification could be achieved in terms of chemical oxygen demand while analysis of specific compounds such as Nebivolol and Paracetamol indicated almost 100% removal. The study revealed that the new design could significantly reduce concentration polarization and reverse salt diffusion resulting in a sustained yield of pure water flux of around 52L/m2h using NaCl as draw solute. Downstream nanofiltration module operated at only 12bar trans-membrane pressure ensured continuous recovery and recycle of 99% of the draw solute while producing safe reusable water at the rate of 58-60L/m2h. The study culminates not only in a new design for a clean water environment but also in definite policy suggestions. Springer-Verlag Berlin Heidelberg, 2015 Forward osmosis nationallicence Industrial wastewater nationallicence Cross-flow module nationallicence Concentration polarization nationallicence Reverse salt flux nationallicence Pharmaceutical compounds nationallicence Thakura Ritwik Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, Durgapur, India aut Chakrabortty Sankha Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, Durgapur, India aut Pal Parimal Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, Durgapur, India aut Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/8(2015-12-01), 2299-2310 1618-954X 17:8<2299 2015 17 10098 https://doi.org/10.1007/s10098-015-0971-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10098-015-0971-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thakura Ritwik Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, Durgapur, India aut NATIONALLICENCE 700 1- Chakrabortty Sankha Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, Durgapur, India aut NATIONALLICENCE 700 1- Pal Parimal Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, Durgapur, India aut NATIONALLICENCE 773 0- Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/8(2015-12-01), 2299-2310 1618-954X 17:8<2299 2015 17 10098