Abstract：
:Long-term effects of COD/N ratios on the nitrogen removal performance and bacterial community of an anammox reactor were evaluated by adding a synthetic medium (with glucose) and real anaerobic effluent to a SBR. At a COD/N ratio of 2.8 (COD, 390mg·L(-1)) ammonium removal efficiency was 66%, while nitrite removal remained high (99%). However, at a COD/N ratio of 5.0 (COD, 300mg·L(-1)), ammonium and nitrite removal efficiencies were high (84% and 99%, respectively). High COD, nitrite, and ammonium removal efficiencies (80%, 90% and 95%, respectively) were obtained on adding anaerobically pre-treated municipal wastewater (with nitrite) to the reactor. DGGE revealed that the addition of anaerobic effluent changed the bacterial community structure and selected for DNA sequences related to Brocadia sinica and Chloroflexi. Adding glucose and anaerobic effluent increased denitrifiers concentration threefold. Thus, the possibility of using the anammox process to remove nitrogen from anaerobically pre-treated municipal wastewater was demonstrated.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Leal CD,Pereira AD,Nunes FT,Ferreira LO,Coelho AC,Bicalho SK,Mac Conell EF,Ribeiro TB,de Lemos Chernicharo CA,de Araújo JCdoi
10.1016/j.biortech.2016.03.107subject
Has Abstractpub_date
2016-07-01 00:00:00pages
257-66eissn
0960-8524issn
1873-2976pii
S0960-8524(16)30410-2journal_volume
211pub_type
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