Research on Degradation Pentachloronitrobenzene of Industrial Wastewater by White Rot Fungi

摘要

Degradation Pentachloronitrobenzene of industrial wastewater by white rot fungi was researched. The experimental conditions were optimized by L_9(3~4) orthogonal test. The experimental result shows that the biochemical temperature is the most important factor, and then are biochemical time and pH and concentration of COD_(cr) of water sample at inlet respectively, its best experimental condition is that biochemical is 25°C, pH=7, biochemical is 48d, and the concentration of water sample at inlet is 2000 mg·L~(-1). And then the comparative experiments of PCNB degradation efficiency at different experimental conditions were carried out. The results show that the degradation efficiency of PCNB can be greatly promoted, and the highest PCNB degradation efficiency is 99.87% at 60d and it is about 78% higher than that of without white rot fungi wastewater sample. Finally, the comparative experiments of PCNB degradation rate was carried out. The results show that the PCNB degradation by white rot fungi is accord with Monod kinetics model when PCNB concentration in wastewater sample is below 116mg/L, and there is the highest PCNB degradation rate(V_(max)), and the V_(max) is 5.49 mg·L~(-1)·d~(-1).