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dc.creatorSouza, Aline dos Reis-
dc.creatorBatista, Ana Maria Moreira-
dc.creatorLeal, Cíntia Dutra-
dc.creatorFia, Ronaldo-
dc.creatorAraújo, Juliana Calábria de-
dc.creatorSiniscalchi, Luciene Alves Batista-
dc.date.accessioned2021-09-21T18:34:43Z-
dc.date.available2021-09-21T18:34:43Z-
dc.date.issued2020-07-
dc.identifier.citationSOUZA, A. dos R. et al. Evaluation of nitrogen removal and the microbial community in a submerged aerated biological filter (SABF), secondary decanters (SD), and horizontal subsurface flow constructed wetlands (HSSF-CW) for the treatment of kennel effluent. Environmental Science and Pollution Research, [S. I.], v. 27, p. 43125-43137, Dec. 2020. DOI: https://doi.org/10.1007/s11356-020-10263-8.pt_BR
dc.identifier.urihttps://doi.org/10.1007/s11356-020-10263-8pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/48209-
dc.description.abstractTo ensure microbial activity and a reaction equilibrium with efficiency and energy saving, it is important to know the factors that influence microbiological nitrogen removal in wastewater. Thus, it was investigated the microorganisms and their products involved in the treatment of kennel effluents operated with different aeration times, phase 1 (7 h of continuous daily aeration), phase 2 (5 h of continuous daily aeration), and phase 3 (intermittent aeration every 2 h), monitoring chemical and physical parameters weekly, monthly microbiological, and qualitative and quantitative microbiological analyzes at the end of each applied aeration phase. The results showed a higher mean growth of nitrifying bacteria (NB) (106) and denitrifying bacteria (DB) (1022) in phase with intermittent aeration, in which better total nitrogen (TN) removal performance, with 33%, was achieved, against 21% in phase 1 and 17% in phase 2, due to the longer aeration time and lower carbon/nitrogen ratio (15.7), compared with the other phases. The presence of ammonia-oxidizing bacteria (AOB), the genus Nitrobacter nitrite–oxidizing bacteria (NOB), and DB were detected by PCR with specific primers at all phases. The analysis performed by 16S-rRNA DGGE revealed the genres Thauera at all phases; Betaproteobacteria and Acidovorax in phase 3; Azoarcus in phases 2 and 3; Clostridium, Bacillus, Lactobacillus, Turicibacter, Rhodopseudomonas, and Saccharibacteria in phase 1, which are related to the nitrogen removal, most of them by denitrifying. It is concluded that, with the characterization of the microbial community and the analysis of nitrogen compounds, it was determined, consistently, that the studied treatment system has microbiological capacity to remove TN, with the phase 3 aeration strategy, by simultaneous nitrification and denitrification (SND). Due to the high density of DB, most of the nitrification occurred by heterotrophic nitrification-aerobic. And denitrification occurred by heterotrophic and autotrophic forms, since the higher rate of oxygen application did not harm the DB. Therefore, the aeration and carbon conditions in phase 3 favored the activity of the microorganisms involved in these different routes. It is considered that, in order to increase autotrophic nitrification-aerobic, it is necessary to exhaust the volume of sludge in the secondary settlers (SD), further reducing the carbon/nitrogen ratio, through more frequent cleaning, whose periodicity should be the object of further studies.pt_BR
dc.languageenpt_BR
dc.publisherSpringer Naturept_BR
dc.rightsrestrictAccesspt_BR
dc.sourceEnvironmental Science and Pollution Researchpt_BR
dc.subjectIntermittent aerationpt_BR
dc.subject16S-rRNA DGGEpt_BR
dc.subjectDenitrificationpt_BR
dc.subjectNitrificationpt_BR
dc.subjectNitrifying bacteria (NB)pt_BR
dc.subjectDenitrifying bacteria (DB)pt_BR
dc.subjectAmmonia-oxidizing bacteria (AOB)pt_BR
dc.subjectÁguas residuais - Tratamentopt_BR
dc.subjectAeração intermitentept_BR
dc.subjectDesnitrificaçãopt_BR
dc.subjectNitrificaçãopt_BR
dc.subjectBactérias nitrificantespt_BR
dc.subjectDesnitrificadorespt_BR
dc.subjectBactérias oxidantes de amóniapt_BR
dc.titleEvaluation of nitrogen removal and the microbial community in a submerged aerated biological filter (SABF), secondary decanters (SD), and horizontal subsurface flow constructed wetlands (HSSF-CW) for the treatment of kennel effluentpt_BR
dc.typeArtigopt_BR
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