Long term partial nitritation of anaerobically treated black water and the emission of nitrous oxide

被引:61
作者
de Graaff, M. S. [1 ,2 ]
Zeeman, G. [1 ]
Temmink, H. [1 ,2 ]
van Loosdrecht, M. C. M. [3 ]
Buisman, C. J. N. [1 ,2 ]
机构
[1] Wetsus, Ctr Excellence Sustainable Water Technol, NL-8900 CC Leeuwarden, Netherlands
[2] Wageningen Univ, Subdept Environm Technol, NL-6700 EV Wageningen, Netherlands
[3] Delft Univ Technol, Dept Biotechnol, NL-2628 BC Delft, Netherlands
关键词
Black water; Partial nitritation; Nitrous oxide emission; Autotrophic nitrogen removal; REMOVAL; REACTOR; NITRIFICATION; OXIDATION; SUPERNATANT; DIGESTION; AMMONIA; SYSTEMS;
D O I
10.1016/j.watres.2009.12.039
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Black water (toilet water) contains half the load of organic material and the major fraction of the nutrients nitrogen and phosphorus in a household and is 25 times more concentrated, when collected with a vacuum toilet, than the total wastewater stream from a Dutch household. This research focuses on the partial nitritation of anaerobically treated black water to produce an effluent suitable to feed to the anammox process. Successful partial nitritation was achieved at 34 degrees C and 25 degrees C and for a long period (almost 400 days in the second period at 25 degrees C) without strict process control a stable effluent at a ratio of 1.3 NO2-N/NH4-N was produced which is suitable to feed to the anammox process. Nitrite oxidizers were successfully outcompeted due to inhibition by free ammonia and nitrous acid and due to fluctuating conditions in SRT (1.0-17 days) and pH (from 6.3 to 7.7) in the reactor. Microbial analysis of the sludge confirmed the presence of mainly ammonium oxidizers. The emission of nitrous oxide (N2O) is of growing concern and it corresponded to 0.6-2.6% (average 1.9%) of the total nitrogen load. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2171 / 2178
页数:8
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