Removal Efficiency and Mechanism of Phenol Wastewater by Algae-Bacteria Granular Sludge
Phenol wastewater comes from a wide range of sources and poses a serious threat to the environment.A mycobacterial granular sludge system(MBGS)was utilized to treat phenol wastewater,the results showed that the removal rates of chemical oxygen demand(COD),ammonia nitrogen(NH4+-N),nitrate nitrogen(NO3--N)and total inorganic nitrogen by MBGS were 71.66%,74.67%,66.92%and 67.19%,respectively.The biomass(MLSS)and EPS(extracellular polymers)of MBGS increased from 1 880 mg/L and 45.92 mg/gvss to 2 500 mg/L and 89.45 mg/gvss,respectively,which proved that MBGS had excellent antitoxicity and removal performance for phenol.Thauera and Flavobacterium were the dominant genera.Detection of effl uent substances by liquid chromatography-mass spectrometry(LC-MS)revealed higher concentrations of chain-like readily degradable organics,suggesting that the COD removal of phenol wastewater by MBGS is through benzene ring opening.
bacterial algal granular sludgephenol wastewaterbacterial community structure:phenol degradation pathway
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