Morphological study of biomass during the start-up period of a fixed-bed anaerobic reactor treating domestic sewage

Lima, Cláudio Antonio Andrade; Ribeiro, Rogers; Foresti, Eugênio; Zaiat, Marcelo

doi:10.1590/s1516-89132005000600020

Cited by 31 publications

(14 citation statements)

References 16 publications

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“…Samples for scanning electron microscopy (SEM) were subjected to the technique developed by Nation (1983) and adapted to bacterial biofilms by Araujo (1995). The sample preparation procedures are also described in Lima et al (2005). Briefly, the samples were fixed in 0.1 M phosphate buffer (pH 7.3) containing 2.5% glutaraldehyde for 12 h at 4ºC.…”

Section: Methodsmentioning

confidence: 99%

Microbial succession within an anaerobic sequencing batch biofilm reactor (ASBBR) treating cane vinasse at 55ºC

Ribas

Chinalia²,

Pozzi

et al. 2009

Braz. arch. biol. technol.

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Section: Methodsmentioning

confidence: 99%

Microbial succession within an anaerobic sequencing batch biofilm reactor (ASBBR) treating cane vinasse at 55ºC

Ribas

Chinalia²,

Pozzi

et al. 2009

Braz. arch. biol. technol.

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“…Improvements made in the configuration of these reactors resulted in systems far more stable, controllable and with high degradation efficiency, even when operated with reduced hydraulic retention time (HRT); something attributed to elevated biomass concentrations and to greater cellular retention time (Lima et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Development of biofilm in anaerobic reactors treating wastewater from coffee grain processing

Fia¹,

Borges²,

Matos³

et al. 2010

Rev. bras. eng. agríc. ambient.

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In recent decades the use of anaerobic fixed bed reactors has been established in Brazil for the treatment of different effluents. As the capability of retaining microorganisms by support media (fixed bed) is a factor influencing the performance of these reactors, the present study aims at evaluating the influence of three fixed bed on the effectiveness of treating an effluent with high pollution potential: wastewater from coffee grain processing (WCP), with organic matter concentrations varying from 812 to 5320 mg L -1 in the form of chemical oxygen demand (COD). Support media used for the immobilization of biomass were: blast furnace slag, polyurethane foam and #2 crushed stone with porosities of 53, 95 and 48%, respectively. The mean efficiency of COD removal in the reactor filled with polyurethane foam was 80%, attributed to its higher porosity index, which also provided greater retention and fixation of biomass which, when quantified as total volatile solids, was found to be 1301 mg g -1 of foam. The biofilm was made up of various microorganisms, including rod, curved rods, cocci, filaments and morphologies similar to Methanosaeta sp. and Methanosarcina sp.Key words: anaerobic treatment, microbial biomass, support media, coffee Desenvolvimento de biofilme em reatores anaeróbios tratando água residuária do processamento dos frutos do cafeeiro RESUMO Nas últimas décadas tem-se registrado, no Brasil, o uso de reatores anaeróbios de leito fixo para o tratamento de diversos tipos de efluentes. Uma vez que a capacidade de retenção de micro-organismos pelo meio suporte (leito fixo) é fator de influência no desempenho desses reatores, buscou-se, com a realização do presente estudo, avaliar a influência do leito fixo na eficiência de três unidades tratando um efluente com elevado potencial poluidor: água residuária do processamento dos frutos do cafeeiro (ARC), com concentração de matéria orgânica variando entre 812 e 5.320 mg L -1 na forma de DQO. Os tipos de suporte utilizados na imobilização da biomassa foram: escória de alto-forno, espuma de poliuretano e brita nº 2, com índice de vazios de 53, 95 e 48%, respectivamente. A eficiência média de remoção de DQO no reator preenchido com espuma de poliuretano foi de 80%, atribuída ao seu maior índice de vazios o qual proporcionou também maior retenção e fixação da biomassa que, quantificada na forma de SVT, foi equivalente a 1.301 mg g -1 de espuma. O biofilme apresentou variedade de microrganismos tendo-se registrado bacilos, bacilos curvos, cocos, filamentos, e morfologias semelhantes a Methanosaeta sp. e Methanosarcina sp.. Palavras-chave:tratamento anaeróbio, biomassa microbiana, meio suporte, café 1 DEA/UFV. Av. PH Rolfs s/n. -Campus da UFV. CEP 36570-000, Viçosa, MG.

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“…Ribas et al (2005) observed similar morphologies in granular sludge collected from an UASB. Additionally, a horizontal-flow anaerobic immobilized biomass (HAIB) reactor treating domestic sewage was found to contain rods, cocci, spirochetes, filaments, fluorescent rods and cocci as well as Methanosaeta sp.-like archaeal cells (Lima et al 2005). Hirasawa (2003) analyzed the granular sludge used in this work via FISH using the EUB338 and ARC915 probes and found that they detected 44.8% and 59.5% of the sample, respectively.…”

Section: Resultsmentioning

confidence: 95%

Evaluation of microorganisms with sulfidogenic metabolic potential under anaerobic conditions

Sakamoto

Maintinguer

Hirasawa

et al. 2012

Braz. arch. biol. technol.

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Morphological study of biomass during the start-up period of a fixed-bed anaerobic reactor treating domestic sewage

Abstract: This work focused on a morphological study of the microorganisms attached to polyurethane foam matrices in a horizontal-flow anaerobic immobilized biomass (HAIB

Cited by 31 publications

References 16 publications

Microbial succession within an anaerobic sequencing batch biofilm reactor (ASBBR) treating cane vinasse at 55ºC

Microbial succession within an anaerobic sequencing batch biofilm reactor (ASBBR) treating cane vinasse at 55ºC

Development of biofilm in anaerobic reactors treating wastewater from coffee grain processing

Evaluation of microorganisms with sulfidogenic metabolic potential under anaerobic conditions

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