Anammox for nitrogen removal from anaerobically pre-treated municipal wastewater: Effect of COD/N ratios on process performance and bacterial community structure
| Autor: | Luísa Ornelas Ferreira, Aline Carolina Cirilo Coelho, Cíntia Dutra Leal, Sarah Kinaip Bicalho, Fernando Terra Nunes, Erika F. Abreu Mac Conell, Juliana Calábria de Araújo, Thiago Bressani Ribeiro, Carlos Augusto de Lemos Chernicharo, Alyne Duarte Pereira |
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| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Nitrogen 0208 environmental biotechnology chemistry.chemical_element Bioengineering 02 engineering and technology 010501 environmental sciences Wastewater 01 natural sciences Nitrogen removal Water Purification chemistry.chemical_compound Bioreactors Ammonium Anaerobiosis Nitrite Waste Management and Disposal Effluent Nitrites 0105 earth and related environmental sciences Biological Oxygen Demand Analysis Renewable Energy Sustainability and the Environment Environmental engineering General Medicine Pulp and paper industry 020801 environmental engineering chemistry Anammox Anaerobic exercise |
| Zdroj: | Bioresource technology. 211 |
| ISSN: | 1873-2976 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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