黑曲霉对海口城市垃圾焚烧飞灰生物淋滤作用的影响  

Effect of Aspergillus Niger on Bioleaching of Haikou Municipal Refuse Incineration Fly Ash

作　　者：李波 李慧君[2] 蹇丽[2] 刘玲玲[2] 

机构地区：[1]海南环境科学研究院,海南海口571126 [2]海南医学院,海南海口571199

出　　处：《环境科学与管理》2016年第5期77-80,共4页Environmental Science and Management

基　　金：海南省卫生厅普通科研课题(13A210327);国家大学生创新创业训练计划项目(201411810050)

摘　　要：采用黑曲霉淋滤海口垃圾焚烧飞灰中的重金属,通过定期监测淋滤过程中的菌体浓度,p H值和飞灰中四种超标重金属Cr、Zn、Cd、Pb在淋滤液中的浓度来探讨黑曲霉对海口城市垃圾焚烧飞灰生物淋滤作用的影响。结果表明:在生物淋滤初期,黑曲霉生长延迟,对飞灰中重金属的滤出作用不明显。随后黑曲霉菌丝浓度缓慢升高,淋滤液p H下降,4种金属在淋滤液中的浓度均不断增加,Cr、Zn、Cd、Pb分别在第12、12、9、12天达到峰值1.51 mg/L、75.72 mg/L、2.18 mg/L、19.09 mg/L。在第18天实验结束时,这4种重金属在淋滤液中的浓度均随菌丝球的出现显著下降。因此黑曲霉可有效去除飞灰中的Cr、Zn、Cd,Pb,并通过将其固定在菌丝球中,降低其在淋滤液中的浓度。Effect of Aspergillus niger on bioleaching of Haikou municipal refuse incineration fly ash was studied by using regular monitoring of the concentration of mycelium,Cr,Zn,Cd,Pb,and the p H in the leaching filtrate. Results showed that Aspergillus niger growth delay in the early stage of bioleaching,and the effect of Aspergillus niger on the heavy metals in fly ash was not obvious. With the increase of mycelium concentration of Aspergillus niger and the decrease of p H in leaching filtrate,the concentrations of 4 metals in the leachate were increasing. Cr、Zn、Cd、Pb reached their maximum values at 1. 51 mg / L,75. 72 mg / L,2. 18 mg / L,19. 09 mg / L after 12,12,9,12 days. At the end of the experiment,the concentration of the 4 heavy metals decreased significantly by hyphaball. So Aspergillus niger can effectively remove Cr,Zn,Cd,Pb in fly ash,and their concentration can be reduced by fixing in the hyphaball.

关 键 词：黑曲霉 生物淋滤 飞灰 菌体浓度 菌丝球 

分 类 号：X51[环境科学与工程—环境工程]