scholarly journals Comparison on nitrosation and anaerobic ammonium oxidation between activated sludge and biofilm from an autotrophic nitrogen removal SBBR

2017 ◽  
Vol 08 (2) ◽  
pp. 141-149
Author(s):  
Yu Qin ◽  
◽  
Jinsong Guo ◽  
Fang Fang ◽  
◽  
...  
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Anaerobic Ammonium Oxidation ◽  
Ammonium Oxidation ◽  
Autotrophic Nitrogen Removal

scholarly journals Remoção biológica de nitrogênio em águas residuárias: uma revisão dos processos convencionais aos processos modernos

2018 ◽  
Vol 9 (3) ◽  
pp. 174-187
Author(s):  
Camila Ferreira Alves ◽  
Carla Beatriz Casagrande Bortoluci ◽  
Eduardo Paniguel Oliveira ◽  
Matheus Marques Pizzo ◽  
Renata Piacentini Rodriguez
Keyword(s):  
High Activity ◽  
Nitrogen Removal ◽  
Ammonia Removal ◽  
Reactor System ◽  
Anaerobic Ammonium Oxidation ◽  
Ammonium Oxidation ◽  
Autotrophic Nitrogen Removal

O lançamento de efluentes em corpos receptores ou em redes de esgoto deve ser monitorado e atender a legislação vigente. As máximas concentrações permitidas para o lançamento de nutrientes, especialmente o nitrogênio, se tornaram mais restritivas após 2005. O nitrogênio é um nutriente que está presente em diferentes tipos de águas residuárias, como chorume, efluentes industriais e esgotamento sanitário. O descarte deste tipo de efluente sem redução da carga de nitrogênio resulta em impactos sobre a fauna e flora de ecossistemas em geral. A remoção de nitrogênio está baseada na conversão de amônia a nitrito e nitrato (nitrificação) e posterior redução destes à nitrogênio gasoso (desnitrificação). Diversos métodos biológicos foram e têm sido desenvolvidos para remover nitrogênio de efluentes baseados em configurações complexas de reatores em série ou em sistemas unicompartimentados. Recentemente, novas rotas metabólicas envolvendo processos mais eficientes e econômicos têm sido apresentadas. Este trabalho apresenta uma revisão da literatura para os processos de nitrificação e desnitrificação convencional, nitrificação e desnitrificação simultânea, Sharon (Single Reactor System for High Activity Ammonia Removal Over Nitrite), Anammox (Anaerobic Ammonium Oxidation) e Canon (Completely Autotrophic Nitrogen Removal Over Nitrite). As principais características de cada processo foram abordadas, destacando-se as principais reações envolvidas, crescimento biológico, inibidores, requisitos e aplicações.

Lipid Composition of Activated Sludge in a Pilot Plant for Anaerobic Ammonium Oxidation

2013 ◽  
Vol 49 (5) ◽  
pp. 481-490
Author(s):  
M. N. Kozlov ◽  
M. V. Kevbrina ◽  
A. G. Dorofeev ◽  
E. A. Kazakova ◽  
V. A. Grachev ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Lipid Composition ◽  
Pilot Plant ◽  
Anaerobic Ammonium Oxidation ◽  
Ammonium Oxidation

The effect of SRT on nitrate formation during autotrophic nitrogen removal of anaerobically treated wastewater

2013 ◽  
Vol 68 (8) ◽  
pp. 1751-1756 ◽  
Author(s):  
Po-Heng Lee ◽  
Wonji Kwak ◽  
Jeaho Bae ◽  
Perry L. McCarty
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Potential Effect ◽  
Treated Wastewater ◽  
Ammonium Oxidation ◽  
Solids Retention ◽  
Total Nitrogen Removal ◽  
Reaction Equations ◽  
Percentage Conversion ◽  
Autotrophic Nitrogen Removal

Autotrophic nitrogen removal, coupling nitritation (ammonium to nitrite) with anaerobic ammonium oxidation (anammox), offers a promising nitrogen-removal alternative, especially for post-treatment of anaerobically-treated wastewater. However, previous reports suggest that less than 90% total nitrogen removal should be expected with this process alone because over 10% of the ammonium removed will be converted to nitrate. This is caused because nitrite conversion to nitrate is required for reduction of carbon dioxide to cell carbon. However, recent research results suggest that more limited nitrate formation of only a few per cent sometimes occurs. It was hypothesized such lower nitrate yields may result from use of long solids retention times (SRT) where net biological yields are low, and providing that the ratio of oxygen added to influent ammonium concentrations is maintained at or below 0.75 mol/mol. Overall reaction equations were developed for each process and combined to evaluate the potential effect of SRT on process stoichiometry. The results support the use of a long SRT to reduce net cell yield, which in turn results in a small percentage conversion to nitrate during ammonium removal and high total nitrogen removals in the range of 90 to 94%.

Nitrogen removal with the anaerobic ammonium oxidation process

2013 ◽  
Vol 35 (8) ◽  
pp. 1145-1154 ◽  
Author(s):  
Ziye Hu ◽  
Tommaso Lotti ◽  
Mark van Loosdrecht ◽  
Boran Kartal
Keyword(s):  
Nitrogen Removal ◽  
Oxidation Process ◽  
Anaerobic Ammonium Oxidation ◽  
Ammonium Oxidation

Anaerobic ammonium oxidation in polyvinyl alcohol and sodium alginate immobilized biomass system: a potential tool to maintain anammox biomass in application

2013 ◽  
Vol 69 (4) ◽  
pp. 718-726 ◽  
Author(s):  
Gang-Li Zhu ◽  
Jia Yan ◽  
Yong-You Hu
Keyword(s):  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Nitrogen Removal ◽  
Enrichment Culture ◽  
Batch Reactor ◽  
Anaerobic Ammonium Oxidation ◽  
Anammox Bacteria ◽  
Ammonium Oxidation ◽  
Gel Beads ◽  
Key Factor

Anaerobic ammonium oxidation (anammox) has been proved to be a promising nitrogen removal method for treating ammonium-rich wastewater. However, because of the low-growth rate of anammox bacteria, maintenance of a sufficient amount of anammox biomass in reactor became a key factor in application. Gel immobilization is an efficient method to prevent biomass from being washed out and to promote hyper-concentrated cultures. This study focused on a nitrogen removal process by anammox enrichment culture immobilized in polyvinyl alcohol and sodium alginate (PVA-SA) gel beads. The rapid startup of reactor demonstrated that gel entrapment was supposed to be a highly effective technique for immobilizing anammox bacteria. The anammox bacteria present in the enrichment were identified to be Jettenia-like species (>98%). Moreover, the effect of hydraulic retention time (HRT), pH, and temperature on immobilized anammox processes were investigated. The effect of pH and temperature on the anammox process was evidently weakened in PVA-SA immobilized gel beads, however, the effect of HRT on the anammox reaction was enhanced. Therefore, a stable operated reactor could be obtained in an anaerobic sequencing batch reactor, which proved gel immobilization was an excellent method to maintain the biomass in anammox reactor for application.

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