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Articles by Farqad F.M. Saeed
Total Records ( 3 ) for Farqad F.M. Saeed
  Farqad F.M. Saeed and Mohammed A. Ibrahim
  The aim of this study is to ascertain the influence of temperature on the bio-hydrogen productivity of marine green algae Chaetomorpha sp. GAF99 in sea water bioreactor system by utilizing multiple regression analysis. The biohydrogen production by green alga cultures was measured periodically at different incubation temperatures of active biohydrogen production phase to generate a model as well as surface response. The generated model {P = 26.81015e (-0.1[(Te-22.6)2+(Tm-24.7)2])} relates production of H2 (mL) as a function of temperature at two daily measurements (i.e., Tm, Te). The results revealed that the model can give significant correlation ship between biohydrogen production and temperature of incubation according to ANOVA statistical analysis based on F and p tests. The model and surface response curve obtained in this study showed clearly that the optimum biohydrogen production was recorded at the dark period at 23.2°C.
  Farqad F.M. Saeed and Mohammed A. Ibrahim
  Biohydrogen production by green algae is effected by environmental conditions. The aim of this study was to show the influence of pH on biohydrogen production by Chaetomorpha sp. GAF99, green alga isolated from Gulf of Aqaba, in seawater bioreactor under anaerobic condition. It was possible to generate a model {HP = 40.52896 e (-15x[(T(C)-24.8)2+(pH-8.18)2])} and building three dimensional plot in order to show the critical influence of various pH values on the biohydrogen production by Chaetomorpha sp. GAF99.The results revealed that the model can give significant relationship between biohydrogen production and pH according to ANOVA statistical analysis based on F and P-tests. The model and three dimensional plot obtained in this study showed clearly that the optimum biohydrogen production was recorded at pH values in the range of 8.2 to 8.7.
  Mohammed A. Ibrahim and Farqad F.M. Saeed
  Green algae are promising source of various types of biofuels and many are capable to catalyze production of hydrogen. In the present work isolation and characterization of green alga collected from Jordan’s coastal part of Gulf of Aqaba are reported. Morphological details of the purified green alga GAF99 indicated it belongs to genus Chaetomorpha. Potential of the alga for hydrogen production in sea water bioreactor was investigated under various environmental conditions. Hydrogen productivity of Chaetomorpha sp. GAF99 was influenced by temperature and light. The main algal capability of hydrogen production occurs during dark period at 23±1°C and it is decreased drastically at higher temperature. Gas chromatography analysis of gaseous mixture obtained under different environmental conditions showed that the percentages of hydrogen gas were in the range 97.767 -99.494. The reported results might indicate that green alga GAF99 has a promising potential for hydrogen production under specific environmental conditions.
 
 
 
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