Hydrogenotrophic methanogenic granular sludge formation for highly efficient transforming hydrogen to CH4

The anaerobic expanded micro-carrier bed (MCB) process, which utilizes fine (50-100 microns) support materials as expanded bed media, was found to have the ability to cultivate granular sludge similar to that formed in the upflow anaerobic sludge blanket (UASB) process. Two laboratory-scale MCB reactors were studied with VFA and glucose wastewaters to clarify the role of the micro-carrier and the influence of substrates on granular sludge formation. Based on these results, a scale-up model with a reactor volume of 800 1 was successfully operated using molasses wastewater to demonstrate the feasibility of granular sludge formation in the MCB process.

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High methanogenic activity of a three-stage UASB in relation to the granular sludge formation

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.138145 ◽

2020 ◽

Vol 724 ◽

pp. 138145 ◽

Cited By ~ 2

Author(s):

Achiraya Jiraprasertwong ◽

Kessara Seneesrisakul ◽

Krittiya Pornmai ◽

Sumaeth Chavadej

Keyword(s):

Granular Sludge ◽

Sludge Formation ◽

Methanogenic Activity

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Impact of cycle type on aerobic granular sludge formation, stability, removal mechanisms and system performance

Journal of Environmental Management ◽

10.1016/j.jenvman.2019.109970 ◽

2020 ◽

Vol 256 ◽

pp. 109970 ◽

Cited By ~ 2

Author(s):

Silvio Luiz de Sousa Rollemberg ◽

Tasso Jorge Tavares Ferreira ◽

Paulo Igor Milen Firmino ◽

André Bezerra dos Santos

Keyword(s):

System Performance ◽

Granular Sludge ◽

Aerobic Granular Sludge ◽

Sludge Formation ◽

Removal Mechanisms

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Aerobic granular sludge formation and COD removal in a continuous-flow microbial fuel cell

10.5004/dwt.2018.23089 ◽

2018 ◽

Vol 129 ◽

pp. 185-193

Author(s):

Ping Yang ◽

Wei Liao ◽

Hui-qiang Li

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

Continuous Flow ◽

Granular Sludge ◽

Cod Removal ◽

Aerobic Granular Sludge ◽

Sludge Formation

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Effects of water characteristics on granular sludge formation in a USB reactor for denitrification of drinking water

Water Science & Technology ◽

10.2166/wst.1994.0463 ◽

1994 ◽

Vol 30 (9) ◽

pp. 141-147 ◽

Cited By ~ 2

Author(s):

S. Tarre ◽

R. Armon ◽

G. Shelef ◽

M. Green

Keyword(s):

Mineral Content ◽

Granular Sludge ◽

Hard Water ◽

Volume Index ◽

Mineralization Process ◽

Sludge Volume Index ◽

Sludge Formation ◽

Water Characteristics ◽

Water Chemical Composition ◽

Influent Water

The effects of water chemical composition on granular sludge formation in a denitrifying USB reactor was studied. The mineral fraction and sludge volume index (SVI) of the granular sludge in the reactor were found to be closely related to the composition of the influent water. Groundwater and simulated ‘hard’ water produced granules with good settling characteristics and high reactor VSS concentrations. Sludge granules from the reactor fed with surface water, which had lower concentrations of calcium and alkalinity, had a low mineral content and high SVI values resulting in biomass washout and reactor instability. The mineralization process, as expressed by the sludge's ash content (mainly CaCO3), is due to an increase in the pH and alkalinity during denitrification thereby changing the reactor's precipitation potential.

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