东北土著白腐真菌处理玉米秸秆纤维素乙醇废水的可行性探讨

青顶拟多孔菌是一种可以降解木质素的白腐真菌，也是具有较高的产漆酶能力的生产者.选择青顶拟多孔菌处理玉米秸秆纤维素乙醇废水，于液体培养青顶拟多孔菌中的锥形瓶中添加不同体积的废水，考察其对不同稀释比玉米秸秆纤维素乙醇废水的处理效果，并通过研究废水投加时间的调控，获得具有高木质素降解率且相对最短降解时间的工艺条件.结果表明:青顶拟多孔菌可从废水中去除50%以上的COD_Cr和23.8%的木质素.对不同稀释比例（1%~20%）玉米秸秆纤维素乙醇废水中木质素具有较好的去除效果，其中稀释6%废水的体系中降解木质素效果最好，在第10天木质素降解率达到73.5%.不同废水投加时间对青顶拟多孔菌处理稀释20%废水体系中木质素的降解效果影响较大，第5天投加废水可获得理想的木质素降解效果，在试验进行的第19天降解率达到68.4%；在投加废水时间不同的情况下，经青顶拟多孔菌处理后的各体系中BOD₅/COD_Cr均有所提升，并且都提升至0.58以上，其中第9天投加废水体系经处理后BOD₅/COD_Cr最大，达到0.64.研究结果可为青顶拟多孔菌处理玉米秸秆纤维素乙醇废水的实际应用提供参考. 

Feasibility Discussion on Treatment of Corn Ethanol Wastewater with Northeastern White Rot Fungus

Polyporellus picipes is a white-rot fungus can degrade lignin, which is a producer of higher laccase capacity. The effects of different dilution ratio corn ethanol wastewater were studied by adding different volume of waste water into the conical flask of P. picipes in liquid culture. The process conditions of high lignin degradation rate and relative shortest degradation time were obtained by studying the regulation of wastewater time. The results showed that over 50% of chemical oxygen demand (COD_Cr) and 23.8% of lignin were removed from the wastewater. P. picipes can effectively remove the lignin of the wastewater of the different wastewater dilution rate (1%-20%), and the best removal effect of lignin was 6%, the degradation rate of lignin reached 73.5% on the 10^th day. The different wastewater-added time had a great effect on the degradation of lignin in the treatment system, the great effect of lignin degradation was obtained on the fifth day, the degradation rate of lignin is 68.4% on the 19^th day; the BOD₅/COD_Cr was improved in the system treated with P. picipes, and the BOD₅/COD_Cr values of the system were increased to 0.58 and above at the different wastewater-added time, BOD₅/COD_Cr values of the 9^th day-added wastewater system is the largest, reached to 0.64. The results may provide a reference for the practical application of the treatment of corn ethanol wastewater.