Parviz Mohammadi; Shaliza Ibrahim; Mohamad Suffian Mohamad Annuar
Volume 2, Issue 1 , March 2015, , Pages 98-102
Abstract
The hydraulic characteristic of an up-flow anaerobic sludge blanket fixed film (UASB-FF) were studied by changing two important hydraulic factors that can impact significantly on the hydraulic regime of the UASB-FF bioreactor: the Up-flow velocity (Vup) and biogas production rate (Qg). The analysis of ...
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The hydraulic characteristic of an up-flow anaerobic sludge blanket fixed film (UASB-FF) were studied by changing two important hydraulic factors that can impact significantly on the hydraulic regime of the UASB-FF bioreactor: the Up-flow velocity (Vup) and biogas production rate (Qg). The analysis of the reactor hydraulic performance was performed by studying hydraulic residence time distributions (RTD) obtained from tracer (Rhodamine B) experiments. The region of exploration for the process was taken as the area enclosed by Vup (0.5 and 3.0 m/h) and Qg (14.87 and 7.96 l/d). Three dependent parameters viz. deviation from ideal retention time ( , dead volume percentage and Morrill dispersion index (MDI) were computed as response. The maximum and dead volume percentage were 33.58 min and 26 % at Vup of 0.5 m/h and Qg of 14.87 l/d, respectively. While, the minimum responses (4.15 min and 19.3 %) were obtained at Vup of 3.0 m/h and Qg of 7.96 l/d, respectively. The values of MDI computed at the minimum and maximum Vup and Qg are identified as 11.33 and 10, respectively, showing that the hydraulic regime in UASB-FF bioreactor is a semi-complete mixing.
Parviz Mohamadi; Liza Ferina; Mohamad Suffian Mohamad Annuar; Shaliza Ibrahim
Abstract
Decolorization of Remazol Brilliant Blue R (RBBR) by Trametessp. Pellets was studied in a batch reactor. Dye removal process was performed in shaken flasks which contained 100 ml of RBBR aqueous solution and fungal pellets. The process was followed for 48 h and the dye removal was analyzed at a visible ...
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Decolorization of Remazol Brilliant Blue R (RBBR) by Trametessp. Pellets was studied in a batch reactor. Dye removal process was performed in shaken flasks which contained 100 ml of RBBR aqueous solution and fungal pellets. The process was followed for 48 h and the dye removal was analyzed at a visible spectrum of 590 nm. Response surface methodology (RSM) employing Box Behnken design at three factors i.e. initial concentration of RBBR, mass of pellet and pH was used to optimize the decolorization process) with three replicates. Response surface regression showed that the decolorization efficiency was affected by initial RBBR concentration. Mass of pellet and pH in this model were not found to be insignificant for both main and square effects. The dye decolorization varied within the range of 16.81% to 77.91%. The lowest decolorization was achieved in maximum initial concentration dye and pH. While the highest decolorization was observed when low initial dye concentration and pH were used. From the optimization, maximum dye removal efficiency of 67.9% ± 5.43 was achieved at 50 ppm RBBR solution, 4 gram of pellets at pH 5.6.
