Granulação natural em reator operado em bateladas sequenciais: características dos grânulos e desempenho no tratamento de esgoto sanitário

Xavier, Jéssica Antunes; Guimarães, Lorena; Leite, Wanderli Rogério Moreira; Martins, Cláudia Lavina; Daudt, Gilberto Caye; Costa, Rejane Helena Ribeiro da

doi:10.1590/s1413-41522018174914

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…According to the guidelines developed by Nor-Anuar et al (2012), the granules can be classified as not strong. Xavier (2017), working with a pilot-scale conventional SBR for the treatment of real wastewater, also found stability coefficients around 25%. However, the author emphasizes that, since the shear force applied during the resistance test is usually much higher than the one actually maintained inside the reactors,…”

Section: Characterization Of Mature Granulesmentioning

confidence: 96%

Effects of coal ash supplementation on aerobic granular sludge cultivated in a simultaneous fill/draw sequencing batch reactor

Barros

Carvalho

Rollemberg

et al. 2020

Eng. Sanit. Ambient.

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This study aimed to verify if coal ash, a residue from thermal power plants, could act as a granulation nucleus, cations source, and abrasive element to favor granules formation and stability in aerobic granular sludge (AGS) systems. Two simultaneous fill/draw sequencing batch reactors (SBRs) (R1 and R2) were operated with 6-h cycles, i.e., the filling and drawing phases occurred simultaneously, followed by the reaction and settling phases. R1 was maintained as control, while R2 was supplemented with coal ash (1 g·L-1) on the first day of operation. Granulation was achieved in both reactors, and no significant differences were observed in terms of settleability, biomass retention, morphology, resistance to shear, and composition of the EPS matrix. However, the ash addition did not change the settleability, biomass retention, granule morphology, shear resistance, and extracellular polymeric substances (EPS) content significantly. COD removal was high (≥ 90%), while nitrogen (~50%) and phosphorus (~40%) removals were low, possibly due to the presence of nitrate during the anaerobic phase. With granulation, microbial population profile was altered, mainly at the genus level. In general, the operational conditions had a more considerable influence over granulation than the ash addition. The possible reasons are because the ash supplementation was performed in a single step, the low sedimentation rate of this particular residue, and the weak interaction between the ash and the EPS formed in the granular sludge. These factors appear to have decreased or prevented the action of the ash as granulation nucleus, source of cations, and abrasive element.

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Section: Characterization Of Mature Granulesmentioning

confidence: 96%

Effects of coal ash supplementation on aerobic granular sludge cultivated in a simultaneous fill/draw sequencing batch reactor

Barros

Carvalho

Rollemberg

et al. 2020

Eng. Sanit. Ambient.

View full text Add to dashboard Cite

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Tecnologia de lodo granular aeróbio no tratamento de esgoto doméstico: oportunidades e desafios

Rollemberg

Oliveira

Firmino

et al. 2020

Eng. Sanit. Ambient.

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RESUMO Considerado por muitos profissionais como um dos maiores avanços do século 21 na área de tratamento de esgotos, os reatores de lodo granular aeróbio (LGA) vêm recebendo bastante atenção em termos de pesquisa e instalação em escala plena em diferentes continentes e condições climáticas. São frequentes os relatos na literatura de eficiências de remoção acima de 90% em termos de demanda química de oxigênio, nitrogênio total e fósforo total, além da manutenção no reator de elevadas concentrações de sólidos (> 8 g SSV/L) sem a necessidade de decantador secundário e recirculação de lodo. Contudo, há também diversos relatos de problemas de instabilidade da biomassa, longo período de formação dos grânulos (principalmente quando se utiliza esgoto real), formação de grânulos pequenos, acúmulo de nitrito e outras questões. Esta revisão explora os mecanismos necessários para granulação em estações de tratamento de esgoto em escala plena no tratamento de esgoto sanitário, incluindo os principais grupos microbianos presentes no LGA, parâmetros-chave para a formação dos grânulos, configurações de reator etc. Além disso, discutem-se algumas questões sobre a operação e a manutenção desses sistemas em escala plena.

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Desenvolvimento De Lodo Granular Aeróbio E Avaliação Do Desempenho De Reator Em Bateladas Sequenciais (Rbs) a Partir De Dois Inóculos Distintos

Gomes¹,

Dias²,

Pereira³

2021

Rev. AIDIS ing. cienc. ambient.

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Granulação natural em reator operado em bateladas sequenciais: características dos grânulos e desempenho no tratamento de esgoto sanitário

Cited by 3 publications

References 35 publications

Effects of coal ash supplementation on aerobic granular sludge cultivated in a simultaneous fill/draw sequencing batch reactor

Effects of coal ash supplementation on aerobic granular sludge cultivated in a simultaneous fill/draw sequencing batch reactor

Tecnologia de lodo granular aeróbio no tratamento de esgoto doméstico: oportunidades e desafios

Desenvolvimento De Lodo Granular Aeróbio E Avaliação Do Desempenho De Reator Em Bateladas Sequenciais (Rbs) a Partir De Dois Inóculos Distintos

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