Removal of high concentration ammonia from wastewater by a combination of partial nitrification and anammox treatment
In: Environmental Technology, Jg. 33 (2012-07-01), S. 1485-1489
Online
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Zugriff:
Attached growth reactors were developed separately for solids retention time (SRT)-controlled partial nitrification and for anaerobic ammonia oxidation (Anammox) treatment, and a new nitrogen removal process is proposed for wastewater containing highly concentrated ammonia. For partial nitrification, an attached growth medium of polyurethane foam was used. Partial nitrification was achieved stably under a SRT of 4 days, and the abundance ratio of NO2(-)-N to the sum of NH4(+)-N, NO2(-)-N and NO3(-)-N was approximately 0.8 after 10 days. Under a SRT of4 days, the amoA gene concentrations of ammonia-oxidizing bacteria increased from 1 x 10(8) to 7 x 10(8) copies/l, whereas the 16S ribosomal RNA (16S rRNA) gene concentrations of nitrite-oxidizing bacteria did not increase. These results indicate that SRT-controlled operation is a promising technology for achieving partial nitrification. For the Anammox treatment, an attached growth medium of non-woven fabric was used. Inorganic nitrogen removal of approximately 80-90% was observed at an inorganic nitrogen loading rate of over 10 kgN/(m3-medium.d) and an influent nitrogen concentration of 400 mgN/l. Our non-woven fabric reactor showed similar or superior Anammox performance to that reported previously. By using a combination of these two rectors, we can develop a method that combines partial nitrification and Anammox treatment for effective and stable nitrogen removal.
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Removal of high concentration ammonia from wastewater by a combination of partial nitrification and anammox treatment
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Autor/in / Beteiligte Person: | Nakagawa, A. ; Hidaka, Taira ; Nishimura, Fumitake ; Tsuno, Hiroshi ; Yorozu, H. |
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Zeitschrift: | Environmental Technology, Jg. 33 (2012-07-01), S. 1485-1489 |
Veröffentlichung: | Informa UK Limited, 2012 |
Medientyp: | unknown |
ISSN: | 1479-487X (print) ; 0959-3330 (print) |
DOI: | 10.1080/09593330.2012.655322 |
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