Increasing the amount of yeast extract in wastewater composition
affected the activity of the microorganisms considerably. The
dye removal increased from 78.6% to 89.2%. Yeast extract is a nitrogen
source for microorganisms so increasing the amount of yeast
extract might facilitate the growing of microorganisms in the system
and hence the dye removal increased.
The percent of dye removal obtained was 82.7%. The dye
removal decreased from 89.2% to 82.7% after increasing the flowrate
more than double. It might be concluded that the microorganisms
adapted with increased capacity to the increased flowrate