Abstract：
:Stable nitrogen removal from the digester supernatant for sludge via the nitritation-anammox process under steady operations of ammonium concentration and flow rate has been often reported. In this study, the effects of four non-steady operations, intentional fluctuations of influent concentration from 890 to 650 mg-N/L and hydraulic load of the 10% increase, temporally shutdown for 3-d and maximum capacity of each reactor, were evaluated in the nitritation-anammox process treating digester supernatant for sludge. No serious effects were observed in the anammox reactor because the aeration-control system in the nitritation reactor responded and controlled the nitritation efficiency satisfactorily against intentional fluctuations and temporally shutdown. Finally, the maximum capacity of each reactor was evaluated, and the nitritation rate was found to be 2.3 kg-N/m(3)/d at a DO of 4.0mg/L, and the nitrogen-conversion rate was 9.0 kg-N/m(3)/d.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Kimura Y,Itokawa H,Noto K,Murakami T,Isaka Kdoi
10.1016/j.biortech.2013.03.130subject
Has Abstractpub_date
2013-06-01 00:00:00pages
196-201eissn
0960-8524issn
1873-2976pii
S0960-8524(13)00498-7journal_volume
137pub_type
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