Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
640371 | Separation and Purification Technology | 2015 | 20 Pages |
Abstract
This article studies a submerged membrane electro-bioreactor (SMEBR), an integrated system embracing biological treatment, electrical coagulation, and membrane filtration, all in one individual reactor, by applying an alternating electric field to a membrane bioreactor (MBR). The alternating electric field has been applied with current densities ranging from 5 to 23Â A/m2 under eight different electrical exposure modes. The results indicate that under the optimum condition with a current density of 12.5Â A/m2 and an exposure mode of (415Â s OFF-185Â s ON), the COD and phosphate removals would be respectively 4% and 43% more compared to an unmodified MBR system. Also at the same current density but with an exposure mode of (496Â s OFF-104Â s ON), ammonia removal efficiency was 22% more than the MBR system. At lower current density of 5 with an exposure mode (400Â s OFF-200Â s ON), the amounts of polysaccharides and proteins were respectively 59% and 51% less than ordinary membrane bioreactor. In summary, the SMEBR reactor membrane fouling is hindered while filtration course and particle size increase. Moreover, at current density less than 20Â A/m2 sludge activity enhances.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Alireza Dehghani Tafti, Seyyed Morteza Seyyed Mirzaii, Mohammad Reza Andalibi, Manouchehr Vossoughi,