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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研究
李佳谣1, 王伟华2, 高大文1
1.东北林业大学林学院;2.哈尔滨市环境监测中心站
摘要:
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均有所提升,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最大,达到0.64。研究结果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。
关键词:  实际玉米秸秆纤维素乙醇废水  青顶拟多孔菌  降解  木质素  可生化性
DOI:
分类号:X
基金项目:
Feasibility Study on Treatment of Corn Ethanol Wastewater with Northeastern White Rot Fungus
LI Jiayao1, WANG Weihua2, GAO Dawen1
1.School of Forestry,Northeast Forestry University;2.Harbin Environmental Monitoring Center
Abstract:
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 Polyporellus picipes in liquid culture. And 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) and 23.8% of lignin were removed from the wastewater. Polyporellus picipes can effectively remove the lignin of the wastewater of the different wastewater dilution rate (1 %-20 %), the best removal effect of lignin was 6%, the degradation rate of lignin reached 73.5% on the10th 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 19th day; the BOD5/COD was improved in the system treated with Polyporellus picipes, and the BOD5/COD values of the system were increased to 0.58 and above at the different wastewater-added time, BOD5/COD values of the 9th day-added wastewater system is the largest, reached 0.64. The results may provide a reference for the practical application of the treatment of corn ethanol wastewater.
Key words:  actual corn ethanol wastewater  polyporellus picipes  degradation  lignin  biodegradability