Abstract:In this paper, the anaerobic wastewater from eucalyptus chemical-mechanical pulp using intimately coupled photocatalysis and biodegradation (ICPB) and Fenton oxidation treatment was explored, and the efficiency, microbial colony structure, and mechanism of ICPB for treating eucalyptus chemical mechanical pulp anaerobic wastewater were studied. The results showed that the biochemical treatment effect of eucalyptus pulping wastewater was poor. ICPB method could significantly improve the aerobic treatment effect of eucalyptus chemi-mechanical pulp wastewater and reduce the dosage of Fenton reagent in the advanced treatment process, which was due to the synergistic effect between photocatalytic oxidation and microbial degradation. The CODCr removal of wastewater in the aerobic treatment process increases from 46.7% to 74.3%. The diversity and richness of microorganisms in ICPB system increased, and the dominant bacteria degrading aromatic compounds increased significantly. |