Study on Fouling Behaviors of Forward Osmosis Membranes in Anaerobic Osmotic Membrane Bioreactors

doi:10.3969/j.issn.1673-1689.2019.10.006

Home > Archive>Volume 38, Issue 10, 2019 >37-42. DOI:10.3969/j.issn.1673-1689.2019.10.006

Study on Fouling Behaviors of Forward Osmosis Membranes in Anaerobic Osmotic Membrane Bioreactors
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                        10.3969/j.issn.1673-1689.2019.10.006
                    
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Performance and fouling of forward osmosis（FO） membranes were investigated in an anaerobic osmotic membrane bioreactor assisted with microfiltration membrane（AnMF-OMBR） treating the synthetic domestic wastewater. The results indicated that the salinity in the reactor could effectively controlled at a level of about 3 mS/cm with the help of MF membrane. The thin-film composite polyamide FO（TFC-FO） membrane had an excellent rejection for organic matters and phosphorus，while had a limited rejection for ammonia nitrogen. The water flux of TFC-FO membrane declined from an initial value of 7.94 LMH to a final value of 2 LMH during 30 days operation of the AnMF-OMBR. Based on the stable salinity in the reactor，the flux decline was mainly due to the membrane fouling，which was composed of organic fouling，inorganic fouling and biofouling. Compared to the inorganic fouling，organic fouling and biofouling played a more important role in the fouling of TFC-FO membrane. The analyses of confocal laser scanning microscope（CLSM） indicated that total cells，proteins and β-D-glucopyranose polysaccharides were the dominant foulants. Moreover，the physical backwashing cannot recover the permeability of the fouled TFC-FO membrane，implying that the irreversible fouling was the main membrane fouling.

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HU Taozhan, WANG Xinhua, WANG Chen, LI Xiufen. Study on Fouling Behaviors of Forward Osmosis Membranes in Anaerobic Osmotic Membrane Bioreactors[J]. Journal of Food Science and Biotechnology,2019,38(10):37-42.

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