预处理方法对玉米芯作为反硝化固体碳源的影响  

Effects of Pretreatment Methods on Corncob as Carbon Source for Denitrification

作　　者：赵文莉[1] 郝瑞霞[1] 李斌[1] 张文怡[1] 杜鹏[1] 

机构地区：[1]北京工业大学建筑工程学院,北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《环境科学》2014年第3期987-994,共8页Environmental Science

基　　金：国家自然科学基金项目(51178005)

摘　　要：分别用1.5%NaOH、1%H2SO4、1.5%H2O2和碱性双氧水(含有1.5%H2O2的NaOH溶液)并联合紫外照射对玉米芯进行预处理,将预处理后玉米芯作为反硝化固体碳源和微生物载体进行静态释碳和静态反硝化实验,考察预处理后玉米芯释碳、反硝化性能及微生物附着情况.结果表明,经过碱和碱性双氧水预处理后的玉米芯碳源可利用性和反硝化效率均有显著的改善,尤其是碱预处理方法,静态反硝化反应至41 d时,仍能保持90%以上的硝酸盐去除率.因此,碱预处理方法可以改善玉米芯释碳性能,有利于微生物的附着和碳源的利用.The corncob was pretreated by 1.5% NaOH, 1% H2804, 1.5% H202 and alkaline hydrogen peroxide （caustic soda solution with 1.5% H202 ） combined with ultraviolet radiation. And the characteristics of carbon released, denitrification and bio-attachment capability of using pretreated corncob as carbon source for denitrification were studied in carbon release and denitrifieation experiments in laboratory scale. The results showed that the denitrification efficiency and the utilizability of the carbon released by the corncob pretreated by alkali or alkaline hydrogen peroxide were significantly enhanced. Especially, for the alkali pretreatment method, the nitrate removal rate could still maintain higher than 90% after 41 days of denitrification experiments. Therefore, the alkali pretreatment method could improve the carbon release performance of the corncob and is beneficial for microbial adsorption and carbon source utilization.

关 键 词：预处理 玉米芯 农业废弃物 固体碳源 反硝化 

分 类 号：X703.1[环境科学与工程—环境工程]