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Efeito do retorno de lodo aeróbio sobre as características da biomassa presente em reatores UASB tratando esgoto sanitário
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pontes, Patrícia Procópio Chernicharo, Carlos Augusto |
| Copyright Year | 2009 |
| Abstract | O presente trabalho buscou avaliar a influencia do retorno do lodo produzido em filtros biologicos percoladores (FBP) sobre as caracteristicas da biomassa em reatores UASB utilizados para o tratamento de esgoto sanitario. Os experimentos foram conduzidos em reatores em escala piloto e em escala de demonstracao, sendo que os reatores UASB foram operados com e sem retorno do lodo produzido nos FBP. Os resultados obtidos indicaram uma diminuicao no diâmetro das particulas de lodo, durante as fases com retorno de lodo, mas apenas para as amostras de lodo tomadas nos pontos mais altos dos reatores anaerobios. A estabilidade e a atividade metanogenica especifica do lodo anaerobio praticamente nao se modificaram com o retorno de lodo. Conforme esperado, a producao especifica de lodo anaerobio aumentou com o retorno de lodo. This work aimed at evaluating the influence of the return of excess aerobic sludge produced in trickling filters (TF) upon the biomass characteristics in UASB reactors used for the treatment of domestic sewage. The experiments were carried out in pilot and demonstration-scale reactors, with the UASB reactors being operated with and without the return of sludge produced in the TF. Smaller sludge particle sizes were observed when the aerobic sludge was returned to the UASB reactor, but only for sludge samples collected in the upper parts of the anaerobic reactors. Sludge stability and specific methanogenic activity were not affected by the return of sludge. As expected, the specific anaerobic sludge production increased with the return of sludge. |
| Starting Page | 223 |
| Ending Page | 234 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.1590/S1413-41522009000200010 |
| Volume Number | 14 |
| Alternate Webpage(s) | http://www.scielo.br/pdf/esa/v14n2/a10v14n2.pdf |
| Alternate Webpage(s) | http://www.abes-dn.org.br/publicacoes/engenharia/resaonline/v14n02/RESA_v14n2_p223-34.pdf |
| Alternate Webpage(s) | https://doi.org/10.1590/S1413-41522009000200010 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
