Impacts of wastewater with various phenolic compounds on the microorganisms of anaerobic granular sludge

Abstract:

To removal the raw materials of bisphenol A (such as phenol, acetone, and molecules of bisphenol A dissolved in the acetone) and various phenolic compounds, which are hard to be detected, from bisphenol A producing wastewater, the adaptability and treating efficiency of microorganisms to this type of wastewater are tested by static cultivating and acclimating the anaerobic granular sludge. The results of static adaptability tests show that the microorganisms adapt to this type of wastewater well. The COD is decreased by 58％ when the contact time is 6 hours. After acclimating the microorganisms for 60 days, the COD removal efficiency can get to 50％ with hydraulic retention time of 9 hours. Great diversity of microorganisms both inside and on the surface of the granular sludge can be found when using SEM to observe the granular sludge in the reactor before and after the experiment.