| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 679866 | Bioresource Technology | 2015 | 8 Pages |
•We developed an enhanced membrane bioreactor (eMBR) for dye and nutrient removal.•eMBR consists of 2 anoxic bioreactors, 1 aerobic membrane bioreactor, a UV-unit and a GAC column.•To maintain alkalinity twice the feed flow is recirculated to anoxic reactors.•More than 90% dye, COD and total nitrogen was removed by eMBR.•Complete removal of dye was achieved in the GAC effluent.
An enhanced membrane bioreactor (eMBR) consisting of two anoxic bioreactors (ARs) followed by an aerated membrane bioreactor (AMBR), UV-unit and a granular activated carbon (GAC) filter was employed to treat 50–100 mg/L of remazol blue BR dye. The COD of the feed was 2334 mg/L and COD:TN:TP in the feed was 119:1.87:1. A feed flow rate of 5 L/d was maintained when the dye concentration was 50 mg/L; 10 L/d of return activated sludge was recirculated to each AR from the AMBR. Once the biological system is acclimatised, 95% of dye, 99% of COD, 97% of nitrogen and 73% of phosphorus were removed at a retention time of 74.4 h. When the effluent from the AMBR was drawn at a flux rate of 6.5 L/m2 h, the trans-membrane pressure reached 40 kPa in every 10 days. AMBR effluent was passed through the UV-unit and GAC filter to remove the dye completely.
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