TY - JOUR
AU - Hossain, Sk Masud
AU - Das, Manas
PY - 2010/05/01
Y2 - 2023/04/02
TI - Mathematical Modeling of Distillery Wastewater Biomethanation in Fluidized-bed Bioreactor
JF - Chemical Engineering Research Bulletin
JA - Chem. Eng. Res. Bull.
VL - 14
IS - 1
SE - Articles
DO - 10.3329/cerb.v14i1.4224
UR - https://www.banglajol.info/index.php/CERB/article/view/4224
SP - 37-43
AB - <p>An anaerobic fluidized- bed reactor was designed to treat distillery wastewaters for biogas generation using actively digested aerobic sludge of a sewage plant. The optimum digestion time was 8 h and optimum initial pH of feed was observed as 7.5 respectively. The optimum temperature of feed was 40°C and optimum feed flow is 14 L/ min with maximum OLR was 39.513 kg COD m<sup>-3</sup> h<sup>-1</sup> respectively. The OLR was calculated on the basis of COD inlet in the bioreactor at dierent flow rates. Maximum CH<sub>4</sub> gas concentration was 63.56 % (v/v) of the total (0.835 m<sup>3</sup> /kg COD m<sup>-3</sup> h<sup>-1</sup>) biogas generation, corresponding to 0.530 m<sup>3</sup> /kg COD m<sup>-3</sup> h<sup>-1</sup> at optimum digestion parameters. Maximum COD and BOD reduction of the distillery wastewaters were 76.82% (w/w) and 81.65% (w/w) with maximum OLR of 39.513 kg COD m<sup>-3</sup> h<sup>-1</sup> at optimum conditions respectively. The rate constant (<em>k</em>) was measured as 0.31 h<sup>-1</sup> in fluidized-bed bioreactor and followed a first order rate equation. The specific growth rate (<em>μ</em>) was 0.99 h<sup>-1</sup> and maximum sp. growth rate (<em>μ</em><sub>max</sub>) was 1.98 h<sup>-1</sup> respectively. The bacterial yield coefficient (<em>Y</em>) was determined as 0.319 /kg COD m<sup>-3</sup> h<sup>-1</sup> at optimum parameters. The studies also dealt with the mathematical modeling of the experimental data on biomethanation and suggested modeling equations relating to kinetic parameter (rate constant, <em>k</em>), maximum specific growth rate (<em>μ</em><sub>max</sub>) with respect to COD (substrate) removal. The mathematical model was also analyzed for hydrodynamic pressure (<em>Δp</em>) vs feed flow (<em>u</em>) and hydrodynamic pressure (<em>Δp</em>) with respect to CH<sub>4</sub> gas yields. The linear and non-linear equations which fitted the models were obtained.</p><p><strong>Keywords:</strong>Biomethanation, anaerobic, optimum condition, modeling</p><p>DOI = 10.3329/cerb.v14i1.4224</p> <p><em>Chemical Engineering Research Bulletin</em> 14 (2010) 37-43</p>
ER -