AWWA MTC57655

Various processes for wastewater reclamation have been widely used to overcome water shortage,especially with membrane filtration. Effluent organic matter (EfOM) from secondary or tertiary-treatedwastewater effluent is target material to remove for wastewater reclamation because EfOM exhibitsrelatively higher DOC levels than natural organic matter (NOM). Membrane filtration with ultrafiltration(UF) membrane can be more effective for reuse of wastewater effluent than nanofiltration (NF) membrane interms of recovery and energy cost, but lower EfOM removal efficiency than NF membrane and fouling withEfOM are major obstacles to its usage. Thus, the transport of EfOM in UF membranes was rigorouslyinvestigated to minimize membrane organic fouling and flux decline.In addition, several different researches have been studied to increase removal efficiency of dissolvedorganic matter in the water and wastewater by UF membranes with coagulation with alum or ferric oxide andpowder activated carbon (PAC) being used as pretreatment. However, coagulation with alum or ferric oxideis not successful to remove dissolved organic matter and PAC pretreatment provided significant flux decline. Thus, polymers additive was tested as apretreatment for membrane filtration to increase EfOM removal.The objectives of this study were to evaluate membrane performance in terms of EfOM removal and fluxdecline, to evaluate the efficiency of coagulation process with polymers as a pretreatment in terms of EfOMremoval by UF membrane filtration, and to determine optimum conditions for membrane filtration,especially for highly negative-charged UF membranes. Includes 6 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

03/05/2003

Number of Pages:

9

File Size:

1 file , 280 KB