Influence of flow direction in the performance of anaerobic filters

Fia, Ronaldo; Schuery, Filipe Cruz; Matos, Antônio Teixeira de; Fia, Fátima Resende Luiz; Borges, Alisson Carraro

doi:10.4025/actascitechnol.v34i2.10353

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Anaerobic filters are considered useful systems, due to the high organic loading rates they tolerate for the treatment of low-and high-concentration effluents (Rajakumar et al, 2011). These filters are characterized by having a layer of support material (bed) inside, on which microorganisms are fixed, forming biofilms (Fia et al, 2012). The objective of this work was to evaluate the COD removal efficiency of an upflow anaerobic filter in continuous mode for the treatment of poultry effluents, using volcanic stone (tezontle) as a support medium.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of an Upflow Anaerobic Filter for Poultry Effluent Treatment

Beristain-López,

Sosa-Villalobos,

Partida-Sedas

et al. 2024

agro

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Poultry slaughterhouses discharge large quantities of effluents that can be treated biologically. The objective of this study was to evaluate the chemical oxygen demand (COD) removal efficiency of an upflow anaerobic filter (UAF) with effluents from a poultry slaughterhouse, using volcanic stone (tezontle) as a support medium. Effluent characterization was carried out in accordance with Mexican official standards and standard methods. The support medium was inoculated with activated sludge from an urban wastewater treatment plant. The filter was operated in continuous flow with applied volumetric loads (AVL) of 1, 1.5, 2, 2.5, and 3 kg COD m-3 d-1 and hydraulic retention times (HRT) of 5.8, 3.8, 2.9, 2.3, and 1.9 days. An analysis of variance (ANOVA) was performed, and significant differences were determined for each AVL using the Krustall-Wallis method. The results obtained in the gradually applied AVL were 26.1, 53.2, 40.1, 17, and 49.7 % COD removal. However, in the AVL of 2 and 2.5 kg COD m-3 d-1, there was a decrease in the removal, which is attributed to the destabilization of the system due to the increase in loads. The maximum methane production was 125 mL at an AVL of 3 kg COD m-3 d-1, with a methane yield (YCH4) of 0.082 LCH4 g-1 COD-1rem. With no increase in methane production at each AVL, the theoretical yield of 0.328 LCH4 g-1 COD-1rem. was not met. The upflow anaerobic filter demonstrated its efficiency with a poultry effluent, with maximum COD removal greater than 50 %; however, more acclimatization time is required for the formation of biofilm in the support medium, a pretreatment that removes the high organic load and allows for gradual biogas production.

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Section: Introductionmentioning

confidence: 99%

Efficiency of an Upflow Anaerobic Filter for Poultry Effluent Treatment

Beristain-López,

Sosa-Villalobos,

Partida-Sedas

et al. 2024

agro

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“…Os dados experimentais, obtidos com as determinações físico-químicas, foram apresentados em gráficos de dispersão com os pontos ligados por linhas suaves para facilitar a visualização. Os valores intermediários entre dois pontos consecutivos não representam interpolação de valores, pois não foram realizadas medições intermediárias nem efetuados ajustes nas curvas.A caracterização do biofilme formado em cada material suporte foi realizada por meio de microscopia eletrônica de varredura (MEV), sendo as principais morfologias celulares presentes avaliadas de acordo com metodologia reportada porFia et al (2012b).Nesta caracterização, as amostras foram fixadas com tampão de fosfato (pH 6,8), contendo 5% de glutaraldeído durante 1 hora e, em Valores médios e do desvio padrão dos parâmetros físico-químicos de caracterização do carvão ativado, da cerâmica de argila e da borracha de pneu.…”

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Materiais alternativos como meio suporte de filtros anaeróbios para tratamento de esgoto sanitário sintético

Baettker

Carvalho

Freire

et al. 2018

Eng. Sanit. Ambient.

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RESUMO O tipo de material utilizado como recheio em filtros anaeróbios pode ser determinante na eficiência do tratamento, então a avaliação de novos materiais se torna importante. Assim, o objetivo deste trabalho foi estudar o comportamento de três filtros anaeróbios de fluxo ascendente, operados de modo contínuo, preenchidos com carvão ativado, cerâmica de argila e borracha de pneu, no tratamento de água residuária sintética com glicose como substrato. Os filtros, em escala de bancada (1,3 L), foram operados com tempo de detenção hidráulica (TDH) de oito e quatro horas, em duas etapas. Seu desempenho, avaliado com o emprego dos parâmetros pH, alcalinidade total e bicarbonato e ácidos voláteis, foi estável nas duas etapas de operação. O filtro que obteve maior eficiência em termos de remoção de demanda química de oxigênio (DQO) foi o com carvão ativado, 94 e 81% nas etapas I e II, respectivamente, seguido do com borracha de pneu, 88 e 63%, e do com cerâmica de argila, 81 e 61%, ambos nas etapas I e II, respectivamente. As principais morfologias encontradas nos meios suportes foram bacilos, cocos, filamentos, Methanosaeta sp. e Methanosarcina sp. As diferenças obtidas entre os filtros podem ser relacionadas com as características distintas de cada material utilizado como meio suporte, e as diferenças entre as etapas ocorrem pelo aumento da carga hidráulica, que diminui o tempo de retenção celular, assim como eventuais diferenças de temperatura.

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“…Horizontal anaerobic fixed bed reactors (HAFBR) have been studied for treatment of different effluents, among which stand out: wastewater from the processing of the fruit from the coffee tree (BORGES et al, 2009), and effluent with the presence of hydrocarbon -BTEX (RIBEIRO et al, 2012) and pentachlorophenol (DAMIANOVIC et al, 2009). This system has the advantage of being built on supported soil, which reduces the construction cost when compared to up flow filter which require a false bottom (suspended) with structure to support the weight of the liquid and support means generally crushed stone (FIA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Start-up of anaerobic reactors for slaughterhouse wastewater treatment

et al. 2015

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This study aimed to evaluate the start-up of a horizontal anaerobic fixed bed reactor (HAFBR) followed by an upflow anaerobic sludge blanket (UASB) for the slaughterhouse wastewater treatment. HAFBR was filled with bamboo rings and had 1.2 m in length, 0.10 m in diameter and volume of 7.5 L. The UASB had the volume of 15 L. The HAFBR and UASB operated at organic loading rate and hydraulic retention time average of 8.46 and 3.77 kg m -3 d -1 of COD and 0.53 and 0.98 days, respectively. During 150 days of monitoring system it was found pH 6.8, relatively high values of bicarbonate alkalinity (> 1000 mg L -1 ) and reduced values of volatile acids (70 to 150 mg L -1 ), which afforded average removal efficiencies of COD total and total suspended solids of the order of 31 and 23% in HAFBR and 79% and 63% in UASB. It can be concluded that the generation and consumption of bicarbonate alkalinity and total volatile acids, thereby maintaining the pH during the study indicated stable operation of the reactors. The COD removal in the reactors was satisfactory especially when it considers that the assessment was conducted in a period of adaptation of organisms to the effluent and also the high organic load applied during this period.KEYWORDS: UASB, anaerobic filter, slaughterhouse, organic matter. , o que proporcionou eficiências médias de remoção de DQO total e sólidos suspensos da ordem de 31 e 23% no RAHLF e de 79 e 63% no UASB. Pode-se concluir que a geração de alcalinidade bicarbonato e consumo de ácidos voláteis totais e consequente manutenção do pH durante o estudo indicaram operação estável dos reatores. A remoção de DQO nos reatores foi satisfatória, principalmente quando se considera que a avaliação foi realizada em per íodo de adaptação dos microrganismos ao efluente e também à elevada carga orgânica aplicada durante este período. PARTIDA DE REATORES ANAERÓBIOS PARA TRATAMENTO DE EFLUENTES PALAVRAS-CHAVE:UASB, filtro anaeróbio, matadouro, matéria orgânica.

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Influence of flow direction in the performance of anaerobic filters

Cited by 5 publications

References 19 publications

Efficiency of an Upflow Anaerobic Filter for Poultry Effluent Treatment

Efficiency of an Upflow Anaerobic Filter for Poultry Effluent Treatment

Materiais alternativos como meio suporte de filtros anaeróbios para tratamento de esgoto sanitário sintético

Start-up of anaerobic reactors for slaughterhouse wastewater treatment

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