{"id":7821,"date":"2020-06-23T16:26:47","date_gmt":"2020-06-23T14:26:47","guid":{"rendered":"http:\/\/www.hydrograv.com\/?page_id=7821"},"modified":"2022-07-07T09:42:28","modified_gmt":"2022-07-07T07:42:28","slug":"anaerobic-digesters","status":"publish","type":"page","link":"https:\/\/www.hydrograv.com\/en\/services\/simulation\/anaerobic-digesters\/","title":{"rendered":"Anaerobic Digesters"},"content":{"rendered":"
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Simulation of Anaerobic Digesters<\/span><\/strong><\/span><\/p>\n

What are the benefits of hydrograv simulations?<\/span><\/strong><\/span><\/p>\n

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  • Maximization of the active volume<\/li>\n
  • Maximization of the circulation rate<\/li>\n
  • Deterministic comparision of variants and optimization of various mixing systems like pumps, screw pumps, agitators or gas injection<\/li>\n<\/ul>\n

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    Example 1: Measurement and simulation of the actual sludge viscosity to increase the forecasting reliabilty
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    • Selection and parameterization of a appropiate rheology model based on laboratory measurements using a viscometer<\/li>\n<\/ul>\n

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      Figure:<\/strong> Laboratory with measuring technology to determine viscosity (left) and measured viscosity as a function of shear rate and adapted rheology model (right).
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      Figure:\u00a0\u00a0 <\/strong>Simulated dynamic viscosity in a digester with three-bladed agitator.
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      Example 2: Visualisation of processes
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      • Streamlines visualisise the flow path and show areas with hydraulic deficits, e.g. short circuits<\/li>\n<\/ul>\n

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        \u00a0<\/strong>\u00a0Figure:<\/strong> Streamlines with velocities.\u00a0<\/span><\/p>\n

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        Example 3: Determination of areas with acitve volume
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        • quantitative determination of areas with velocities greater than 1 cm\/s<\/li>\n<\/ul>\n

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          Figure:<\/strong> Visualization and analysis of the active volume in a digester for different geometrical and operational variants.
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          Example 4: Detailed deterministic analysis of the actual circulation rate<\/strong><\/p>\n

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          • Circulation rate as a function of the flow velocity, e.g. as a funcion of the tank height or as volume fraction<\/li>\n<\/ul>\n

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            Figure:<\/strong> Analysis of the circulation rate along the tank height (left) and als fraction of the total volume (right).
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