Application of nanofiltration for reuse of municipal wastewater and quality analysis of product water

In this study, the municipal wastewater treated by biological methods was used for further treatment by nanofiltration method for wastewater reuse. For this purpose, different nanofiltration (NF) membranes, such as CK. NF-90, and NF-270 were employed. The quality analysis of product water was carried out using various analytical techniques. The results revealed that the NF-90 membrane can produce the best water quality compared to other two membranes. The CK membrane showed also a good rejection property after NF-90 membrane but its big inconvenience is that it gave a lower water flux. Despite the good water flux by NF-270, the permeate quality obtained with this membrane was not as good as obtained with the NF-90 and CK membranes. (C) 2012 Elsevier B.V. All rights reserved.