Performance of UASB reactors in two stages under different HRT and OLR treating residual waters of swine farming

Urbinati, Estevão; Duda, Rose Maria; Oliveira, R. A. de

doi:10.1590/s0100-69162013000200015

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…The use of anaerobic treatment systems in two stages can impro ve stability, reduce problems with excessive duplication of acidogenic bacteria and consequently the reduction of methanogenic archaea, and increase the removal efficiency of organic matter (BRUNO & OLIVEIRA, 2008;COLUSSIA et al, 2013;URBINATI et al, 2013). The dragging of solids (sludge) HAFBR during the monitoring period of experimental units reduced the SST removed load in HAFBR (Table 4).…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

Start-up of anaerobic reactors for slaughterhouse wastewater treatment

et al. 2015

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“…Units: diameter and length (m) and total and useful volume (L); R1, R2 and R3first, second and third in-series HARFB. (Urbinati et al, 2013). In contrast, the pH of VW was from 4 to 5, which was not favorable for the growth of methanogenic archaea (Leite et al, 2014).…”

Section: Affluentmentioning

confidence: 90%

Anaerobic co-digestion of vegetable waste and swine wastewater in high-rate horizontal reactors with fixed bed

Mazareli¹,

Duda²,

Leite

et al. 2016

Waste Management

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Considering the high waste generation that comes from agriculture and livestock farming, as well as the demand for natural gas, it is necessary to develop sustainable technologies which can reduce environmental impact. There is no available literature on the use of high-rate horizontal anaerobic reactors with fixed bed (HARFB) and continuous feed for the co-digestion of vegetable wastes (VW) and swine wastewater (SW). The aim of this work was to evaluate the reactor performance in terms of methane production, organic matter consumption, and removal of total and thermotolerant coliforms under different proportions of SW and VW, and organic loading rates (OLR) of 4.0, 5.2 and 11.0g COD (Ld)(-)(1). The mixture of SW and VW in the proportions of 90:10, 80:20 and 70:30 (SW:VW) with those OLRs provided great buffering capacity, with partial alkalinity reaching 3552mgL(-1), thereby avoiding the inhibition of methane production by volatile fatty acids produced during the fermentation process. Higher proportions of VW and higher OLR improved volumetric methane production with a maximum value of 1.08LCH4 (Ld)(-)(1), organic matter removal rates up to 98% and total and thermotolerant coliform removal rates of 99% were also observed.

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“…A modernização da suinocultura, os avanços tecnológicos no sistema produtivo e o surgimento destas agroindústrias, fez com que muitos produtores menos competitivos fossem excluídos do mercado e, os demais, acabaram adotando um sistema de confinamento altamente especializado, com a criação de um número maior de animais em áreas cada vez menores (SPIES, 2009;URBINATI;OLIVEIRA, 2013).…”

Section: Alteração Da Estrutura De Produção Aumento Na Geração De Dejetos E Poluição Ambientalunclassified

Legislação Ambiental Brasileira E O Desenvolvimento Da Atividade Suinícola Com Alternativas Para O Gerenciamento Ambiental Adequado Dos Dejetos Animais

Martins¹,

Lima²,

Soto³

et al. 2019

Nucleus

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A suinocultura brasileira é uma atividade econômica de grande destaque no cenário nacional e internacional. No entanto, devido a muitas aplicações irregulares e descuidadas de todo o processo de produção suína, se teve também um crescimento mundial no potencial poluidor da suinocultura, sendo necessário que sua implantação e desenvolvimento sejam orientados por instrumentos legais e regulares. O presente estudo de revisão de literatura teve como objetivo promover uma análise da aplicação da legislação ambiental brasileira no desenvolvimento da suinocultura, e caracterizar as alternativas voltadas para a promoção de sustentabilidade na cadeia produtiva desta atividade.

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Performance of UASB reactors in two stages under different HRT and OLR treating residual waters of swine farming

Cited by 6 publications

References 9 publications

Start-up of anaerobic reactors for slaughterhouse wastewater treatment

Start-up of anaerobic reactors for slaughterhouse wastewater treatment

Anaerobic co-digestion of vegetable waste and swine wastewater in high-rate horizontal reactors with fixed bed

Legislação Ambiental Brasileira E O Desenvolvimento Da Atividade Suinícola Com Alternativas Para O Gerenciamento Ambiental Adequado Dos Dejetos Animais

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