Efeitos da temperatura e velocidade superficial em sistema anaeróbio de duas fases tratando esgoto sanitário sintético em reatores horizontais com células imobilizadas

Barboza, Márcio Gomes

doi:10.11606/t.18.2016.tde-24112016-145350

Cited by 1 publication

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“…The half supporter contributes to the increase in the solid retention time, favoring the methanogenic population and, thus, increases the capacity of the horizontal reactor to resist organic shocks, changes in the characteristics of the substrate, and the presence of toxic compounds, but may also contribute to clogging of the reactor due to excessive retention of suspended solids (RODGERS et al, 2008). To prevent clogging of the fixed bed, the horizontal anaerobic reactor can be used only with sludge blanket at one stage (BARBOZA, 2002 andSILVA et al, 2008) or in facilities in series.…”

Section: Introductionmentioning

confidence: 99%

Start-up of horizontal anaerobic reactors with sludge blanket and fixed bed for wastewater treatment from coffee processing by wet method

Oliveira

Bruno

2013

Eng. Agríc.

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ABSTRACT:In this study it was evaluated the start-up procedures of anaerobic treatment system with three horizontal anaerobic reactors (R1, R2 and R3), installed in series, with volume of 1.2 L each. R1 had sludge blanket, and R2 and R3 had half supporter of bamboo and coconut fiber, respectively. As an affluent, it was synthesized wastewater from mechanical pulping of the coffee fruit by wet method, with a mean value of total chemical oxygen demand (CODtotal) of 16,003 mg L -1 . The hydraulic retention time (HRT) in each reactor was 30 h. The volumetric organic loading (VOL) applied in R1 varied from 8.9 to 25.0 g of CODtotal (L d) -1 . The mean removal efficiencies of CODtotal varied from 43 to 97% in the treatment system (R1+R2+R3), stabilizing above 80% after 30 days of operation. The mean content of methane in the biogas were of 70 to 76%, the mean volumetric production was 1.7 L CH 4 (L reactor d) -1 in the system, and the higher conversions were around at 0.20 L CH 4 (g COD removed )-1 in R1 and R2. The mean values of pH in the effluents ranged from 6.8 to 8.3 and the mean values of total volatile acids remained below 200 mg L -1 in the effluent of R3. The concentrations of total phenols of the affluent ranged from 45 to 278 mg L -1 , and the mean removal efficiency was of 52%. The start-up of the anaerobic treatment system occurred after 30 days of operation as a result of inoculation with anaerobic sludge with active microbiota.KEYWORDS: volumetric organic loading, bamboo, methane, phenols, reactors in series. PARTIDA DE REATORES ANAERÓBIOS HORIZONTAIS COM MANTA DE LODO E DE LEITO FIXO PARA TRATAMENTO DE ÁGUAS RESIDUÁRIAS DO BENEFICIAMENTO DE FRUTOS DO CAFEEIRO POR

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Section: Introductionmentioning

confidence: 99%