在厌氧氨氧化（厌氧氨氧化）反应器中底物对N2O排放的影响

Effectsof substrateson N2Oemissionsin ananaerobicammoniumoxidation(anammox)reactorYueJin1,DunqiuWang2,3andWenjieZhang2,3*BackgroundNitrogenremoval(NR)isanimportantcomponentofwastewatertreatment.Biologicalnitrogenremoval(BNR)isoftenpreferredtoothernon-biologicprocessesduetoitshighefficiencyandenergyconservationcharacteristics.Evenso,thetraditionalBNRprocesshasseveraldisadvantages,suchasexcessiveoxygenbeingconsumedduringthenitrationperiodandtherequirementofadditionalorganiccarbonfordenitrification.In1995,thebiologicalanaerobicammoniumoxidation(anammox)reactionwasfirstreportedinanup-flowreactor(Mulderet al.1995).Theanammoxprocessoperatesunderanaerobicconditionswherenitriteisusedasanelectronacceptorbyanammoxbacteriaforoxi-dationofammoniatonitrogengas(N2)(Kuenen2008).Byusingthisnewtechnology,only50 %ofthesourceammoniumneedstobeoxidizedtonitrite.Thismeansthattheoxygenrequirementisreducedtoabout75 %ofthetraditionalBNRprocess.Anam-moxbacteriaareautotrophicmicroorganisms,therefore,additionalca