چکیده مقاله
Biodegradation of Phenethrene PHE was studied in aqueous phase to demonstrate the potential of the mixed culture in degradation of high concentration of PHE The experiments were conducted to monitor biodegradation of phenanthrene for duration of 6 days Biodegradation of PHE was successfully achieved in low and middle concentration using specific isolated mixed culture The PHE biodegradation was carried out in batch bioreactor with response surface methodology RSM based on central composite face entered design CCFD Associate full factorial Central Composite Design of experiments was used to construct response surface with the removal of PHE degradation and the specific growth rate responses The initial phenanthrene concentration X1 and the reaction time X2 were used as design factors The experimental results were shown that experimental data fitted with the proposed polynomial model Analysis of variance showed a high coefficient of determination value in the range of 0 936 0 999 The maximum biodegradation of PHE in terms of the removal of PHE Y1 was found to be 0 98 mg/mg degraded PHE/initial PHE The maximum extent of biodegradation relative to initial PHE concentration and biomass Y2 was 0 08 mg/mg/mg degraded PHE/initial PHE/biomass This maximum biodegradation correspond to the factors combination of middle level of PHE content X1=43 01mg/L and the highest level of reaction time X2=103 53 hours The optimum specific growth rate Y3 was found be 0 0081 h 1 A98% removal efficiency of PHE biodegradation was achieved Polynomial model was found useful to predict PHE degradation under the experimental studied It was observed that optimum biodegradation of PHE can be successful predicted by RSM
کلیدواژهها
نویسندگان
G.D.Najafpour
Department of Chemical Engineering , University of Mazandaran, Babol, Iran
W.S.Long
School of Chemical Engineering, University Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Seberang Perai Selectan, Penang, Malaysia
A.H.Kamaruddin
School of Chemical Engineering, University Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Seberang Perai Selectan, Penang, Malaysia
H.S.Nasrollahzadeh
School of Chemical Engineering, University Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Seberang Perai Selectan, Penang, Malaysia
شیوه ارجاع
G.D.Najafpour, and W.S.Long, and A.H.Kamaruddin, and H.S.Nasrollahzadeh, ,1385,Central Composite Face-Entered Design (CCFD) for the Biodegradation of phenanthrene by Mixed Culture Consortia in Batch Bioreactor,7th International Congress on Civil Engineering,Tehran
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