摘要
To the electronics wastewater with high salinity,the fouling propensity of effluent from the membrane bioreactor（ MBR） system played an important role for the design and long-term operational sustainability of the MBR ＋ Reverse Osmosis（ RO） system. In this text,the effluent quality,settling performance and membrane fouling were researched with three dimension excitation-emission fluorescence spectra（ EEM） and scanning electron microscope（ SEM）-Energy Dispersive Spectrometer（ EDS）. The results showed that there were few organics with a strong adhesion in the effluent. The metal ions in the effluent not only had a complexation reaction with the macromolecules fulvic acid and protein but also with silicon colloid. It caused a compact fouling layer on the RO membrane surface. But the organics and most of inorganic matters could form settling of flocs and be removed from the effluent by improving p H of the effluent,which would relieve the membrane fouling. In addition,the removal of metal ions in the fouling layer was critical for enhancing the cleaning efficiency of RO membrane.
To the electronics wastewater with high salinity,the fouling propensity of effluent from the membrane bioreactor（ MBR） system played an important role for the design and long-term operational sustainability of the MBR ＋ Reverse Osmosis（ RO） system. In this text,the effluent quality,settling performance and membrane fouling were researched with three dimension excitation-emission fluorescence spectra（ EEM） and scanning electron microscope（ SEM）-Energy Dispersive Spectrometer（ EDS）. The results showed that there were few organics with a strong adhesion in the effluent. The metal ions in the effluent not only had a complexation reaction with the macromolecules fulvic acid and protein but also with silicon colloid. It caused a compact fouling layer on the RO membrane surface. But the organics and most of inorganic matters could form settling of flocs and be removed from the effluent by improving p H of the effluent,which would relieve the membrane fouling. In addition,the removal of metal ions in the fouling layer was critical for enhancing the cleaning efficiency of RO membrane.
基金
Supported by the Collaborative-innovative Project of Beijing Chaoyang District(XC1619)
