Performance of partial nitritation-anammox processes at mainstream conditions in an IFAS system

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:250

Article

Pedrouso, Alba¹  Trela, Jozef²  Val del Rio, Angeles¹  Mosquera-Corral, Anuska¹  Plaza, Elzbieta² 

[1] Univ Santiago de Compostela, Dept Chem Engn, Sch Engn, Rua Lope Gomez de Marssoa S-N, E-15782 Santiago De Compostela, Galicia, Spain

[2] Royal Inst Technol KTH, Dept Sustainable Dev Environm Sci & Engn, Teknikringen 1013, SE-10044 Stockholm, Sweden

关键词: Anammox;    Autotrophic nitrogen removal;    Integrated fixed film activated sludge;    Mainstream;    Nitritation;   

DOI  :  10.1016/j.jenvman.2019.109538

来源: Elsevier

【 摘 要 】

The partial nitritation-anammox processes implementation in the main line of wastewater treatment plants would lead them closer to the energy autarky. With this purpose, an integrated fixed film activated sludge (IFAS) reactor was operated at pilot scale. Efficient nitrogen removal (72 +/- 11%) was achieved for anaerobically pretreated municipal wastewater at low temperature (21 - 15 degrees C), with a nitrogen removal rate of 37 +/- 3 g N/ (m(3).d) at 15 degrees C. The ammonium oxidizing bacteria were more abundant in the activated sludge, while anammox bacteria were primarily located in biofilm attached onto the carriers surface. Nitrite oxidizing bacteria (NOB) activity was similar between both fractions and its specific activity decreased more than that of other populations when the operating temperature was reduced. Furthermore, the IFAS operational strategy (aerobic/anoxic periods) allowed an efficient NOB activity suppression inside the reactor, which accounted only for the 10 - 20% of the maximum potential activity.

【 授权许可】

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