Disposal of Phenol Wastewater with the Immobilized Photosynthetic Bacteria in the Biological Fluidized Bed

The photosynthetic bacteria(PSB) were immobilized by the sodium alginate-chitosan-powder active carbon(SA-CA-PAC) microcapsules in the biological fluidized bed made by our lab.The immobilized state and the free state were separately used to dispose phenol wastewater at different culture temperatures,with different culture time,inoculation quantity and phenol concentration.In the treatment process,the phenol degradation values were analyzed.The result shows that the PSB have the ability of decompounding the phenol wastewater,and the treatment effect varies under different states.Among those,the effect of immobilized PSB is better.The further orthogonal experiment indicates that the effect order of factors on the degradation rate of phenol wastewater with the immobilized one is temperaturepHinoculation quantity.After the treatment of 7 days in the 20 L biological fluidized bed,the best conditions are obtained,namely,the temperature is 30 ℃,the pH is 7.0,and the inoculation quantity is 15 000 grains.At the same time,the phenol removal rate arrives 91.7%.