Oxidation reduction potential automatic control potential of intermittently aerated membrane bioreactor for nitrification and denitrification
An intermittently aerated membrane bioreactor (IAMBR) process is designed to achieve greater removal efficiency of organic matter and nutrients than a regular membrane bioreactor (MBR) through the control on and off of an aerator. In this paper, we have investigated Oxidation/Reduction Potential (OR...
| Veröffentlicht in: | Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 60(2009), 1 vom: 03., Seite 167-73 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2009
|
| Zugriff auf das übergeordnete Werk: | Water science and technology : a journal of the International Association on Water Pollution Research |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Membranes, Artificial Nitrites |
| Zusammenfassung: | An intermittently aerated membrane bioreactor (IAMBR) process is designed to achieve greater removal efficiency of organic matter and nutrients than a regular membrane bioreactor (MBR) through the control on and off of an aerator. In this paper, we have investigated Oxidation/Reduction Potential (ORP) and Dissolved Oxygen (DO) values compared to NH4(+)-N and NO3(-)-N concentrations at SRTs of 20, 30 and 40 days and C/N ratios of 4.5, 7, and 10. Additionally, the paper addresses a comprehensive approach to evaluate ORP as an appropriate factor for the auto-control of IAMBR process on the nitrification and denitrification and present DeltaORP/Deltat curve to confirm accurate completion time of aeration on and off. As the results of ORP and DO curve, it is proven that points of ORP bending and knee are appropriate factors for auto-control of the process in both aeration on and off time and ORP as well as DO relate to the dynamic behavior of nutrient concentration during a cycle. A peak point at aerobic state and a slump point at anoxic state on DeltaORP/Deltat curve obviously present the ORP bending point. Hence, it could find that peak point and slump point indicated the relatively accurate completion time of nitrification and denitrification respectively in IAMBR |
|---|---|
| Beschreibung: | Date Completed 17.09.2009 Date Revised 09.07.2009 published: Print Citation Status MEDLINE |
| ISSN: | 0273-1223 |
| DOI: | 10.2166/wst.2009.330 |