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<p>The aim of the study was to evaluate the process kinetics of a hybrid upflow anaerobic sludge blanket (HUASB) reactor filled with seashell attached media (aquaculture waste material), a sustainable biofilm media. A lab-scale working model of a HUASB reactor was set up and operated at varied hydraulic retention times (starting from 8&#xa0;h and reduced to 2&#xa0;h with an interval of half an hour) and organic loading rates (0.5–6.0&#xa0;kg COD/m<sup>3</sup>/d). Based on the experimental data generated during the study, an attempt has been to determine the process and bio-kinetic constants. The obtained values of reaction rate based kinetic constants namely reaction rate order (n) was 0.9 and reaction rate constant (K) 14.7 (mg/L)<sup>1−n</sup> d <sup>–1</sup>. The results were also analyzed for biokinetic constants using various kinetic models, namely first order, grau second, stover kincannon and monod. The grau second order kinetic model was found to best fit for the prediction of reactor’s performance among all the model equations assessed. The findings of the study highlight the resource effective and circular economy driven sewage treatment to improve environmental sustainability, which is align with united nations SDGs.</p>

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Process Kinetic Evaluation of Hybrid Upflow Anaerobic Sludge blanket Reactor Using Seashell as an Attached Media

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • Bina Birenkumar Patel,
  • Paresh H. Rana

摘要

The aim of the study was to evaluate the process kinetics of a hybrid upflow anaerobic sludge blanket (HUASB) reactor filled with seashell attached media (aquaculture waste material), a sustainable biofilm media. A lab-scale working model of a HUASB reactor was set up and operated at varied hydraulic retention times (starting from 8 h and reduced to 2 h with an interval of half an hour) and organic loading rates (0.5–6.0 kg COD/m3/d). Based on the experimental data generated during the study, an attempt has been to determine the process and bio-kinetic constants. The obtained values of reaction rate based kinetic constants namely reaction rate order (n) was 0.9 and reaction rate constant (K) 14.7 (mg/L)1−n d –1. The results were also analyzed for biokinetic constants using various kinetic models, namely first order, grau second, stover kincannon and monod. The grau second order kinetic model was found to best fit for the prediction of reactor’s performance among all the model equations assessed. The findings of the study highlight the resource effective and circular economy driven sewage treatment to improve environmental sustainability, which is align with united nations SDGs.