Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.2166/wst.2007.518 |
| Title (Primary) | Model experiments on improving nitrogen removal in laboratory scale subsurface constructed wetlands by enhancing the anaerobic ammonia oxidation |
| Author | Paredes, D.; Kuschk, P.; Stange, F.; Müller, R.A.
; Köser, H. |
| Source Titel | Water Science and Technology |
| Year | 2007 |
| Department | UBT; BOPHY; UBZ |
| Volume | 56 |
| Issue | 3 |
| Page From | 145 |
| Page To | 150 |
| Language | englisch |
| Keywords | Anaerobic ammonia oxidation; Anammox; constructed wetlands; nitrite; nitrogen removal |
| Abstract | Anaerobic ammonia oxidation (Anammox) has been identified as a new general process-strategy for nitrogen removal in wastewater treatment. In order to evaluate the role and effects of the Anammox process in wetlands, laboratory-scale model experiments were performed with planted fixed bed reactors. A reactor (planted with Juncus effusus) was fed with synthetic wastewater containing 150-200 mg L-1 NH+4 and 75-480 mg L-1 NO-2. Under these operating conditions, the plants were affected by the high ammonia and nitrite concentrations and the nitrogen removal rate fell within the same range of 45-49 mg N d-1 (equivalent to 0.64-0.70 g Nm-2d-1) as already reported by other authors. In order to stimulate the rate of nitrogen conversion, the planted reactor was inoculated with Anammox biomass. As a result, the rate of nitrogen removal was increased 4-5-fold and the toxic effects on the plants also disappeared. The results show that, in principle, subsurface flow wetlands can also function as an "Anammox bioreactor". However, the design of a complete process for the treatment of waters with a high ammonia load and, in particular, the realisation of simple technical solutions for partial nitrification have still to be developed. |
| Paredes, D., Kuschk, P., Stange, F., Müller, R.A., Köser, H. (2007): Model experiments on improving nitrogen removal in laboratory scale subsurface constructed wetlands by enhancing the anaerobic ammonia oxidation Water Sci. Technol. 56 (3), 145 - 150 10.2166/wst.2007.518 |
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