Importance of the operating pH in maintaining the stability of anoxic ammonium oxidation (anammox) activity in moving bed biofilm reactors

► Two parallel moving bed biofilm reactors were operated to assess pH-associated anammox activity changes. ► It was observed that the reactor operating under pH of about 7.5–8.1 exhibited 61% lower NRR than a reactor set at pH of 6.5. ► It was found that high nitrite was not necessarily the cause fo...

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