Using XAD-8/XAD-4 resins, dissolved organic matter (DOM) in the effluent of membrane bioreactor (MBR) used for electroplating wastewater treatment was fractionated into five fractions: transphilic acid (TPI-A), transphilic neutral (TPI-N), hydrophobic acid (HPO-A), hydrophobic neutral (HPO-N), and hydrophilic fraction (HPI). Thereafter, the changes of dissolved organic carbon (DOC), ultraviolet visible spectroscopy and polysaccharide of each fraction before and after metal impact were analyzed. HPI, HPO-A and HPO-N are the major organic constituents in electroplating wastewater, accounted for 87.5% of total DOC, biodegradation of MBR is more suitable for the removal of organic wastewater with high content of hydrophobic substances. Aromatic compounds in electroplating wastewater mainly from HPO-N, polysaccharide mainly distributed in HPO-A, HPO-N and TPI-N, TPI-N and HPO-N. The effect of MBR on the removal of neutral compounds is better. Before the impact of heavy metals, the removal rates of TPI-N and HPO-N were 73.3% and 99.1%, respectively.
Liu, R., Huang, X., Chen, L.J., Wen, X.H. and Qian, Y. (2005) Operational Performance of a Submerged Membrane Bioreactor for Reclamation of Bath Wastewater. Process Biochemistry, 40, 125-130.
Wang, Z.W., Wu, Z.C. and Tang, S.J. (2009) Characterization of Dissolved Organic Matter in a Sub-merge Membrane Bioreactor by Using Three-Dimensional Excitation and Emission Matrix Fluorescence Spectroscopy. Water Research, 43, 1533-1540. http://dx.doi.org/10.1016/j.watres.2008.12.033
Liang, S. and Song, L. (2007) Characteristics and Fouling Behaviors of Dissolved Organic Matter in Submerge Membrane Bioreactor Systems. Environment Engineering Science, 24, 652-662. http://dx.doi.org/10.1089/ees.2006.0147
Peiris, R.H., Budman, H., Moresoil, C. and Legge, R.L. (2011) Development of a Species Specific Fouling Index Using Principal Component Analysis of Fluorescence Excitation-Emission Matrices for the Ultrafiltration of Natural Water and Drinking Water Production. Journal of Membrane Science, 378, 257-264.
Thacker, S.A., Tipping, E., Baker, A. and Gondar, D. (2005) Development and Application of Functional Assays for Freshwater Dissolved Organic Matter. Water Research, 39, 4559-4573. http://dx.doi.org/10.1016/j.watres.2005.08.020
Kitis, M., Karanfil, T., Wigton, A. and Kilduff, J.E. (2002) Probing Reactivity of Dissolved Organic Matter for Disinfection By-Product Formation Using XAD-8 Resin Adsorption and Ultrafiltration Fraction. Water Research, 36, 3834-3848. http://dx.doi.org/10.1016/S0043-1354(02)00094-5