| EDTA对生物转鼓的NO废气净化效率的影响 |
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| 引用本文： | 章巍,陈浚,陈建孟.EDTA对生物转鼓的NO废气净化效率的影响[J].环境科学与技术,2009,32(12). |
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| 作者姓名： | 章巍 陈浚 陈建孟 |
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| 作者单位： | 浙江工业大学生物与环境工程学院,浙江,杭州,310032 |
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| 摘 要： | 生物转鼓过滤器(Rotating Drum Biofilter,RDB)是一种能有效净化氮氧化物废气的新型生物反应器,但在之前的实验发现,由于NO在液相中的低溶解度降低了NO在RDB中的传质效果,从而影响其去除效率。改善气液传质速率是整个反硝化降解NO过程的关键步骤,实验用CuⅡ(EDTA)、ZnⅡ(EDTA)、MgⅡ(EDTA)和FeⅡ(EDTA)等络合剂添加到营养液中,利用NO能与络合剂结合的原理,使得NO能快速溶于液相,从而使NO去除效率由原来平均85%提高到98%。
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| 关 键 词： | 生物过滤 生物转鼓 一氧化氮 反硝化 EDTA |
Effect of EDTA on Removal Efficiency of Nitric Oxide in a Rotating-drum Biofilter |
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| ZHANG Wei,CHEN Jun,CHEN Jian-meng.Effect of EDTA on Removal Efficiency of Nitric Oxide in a Rotating-drum Biofilter[J].Environmental Science and Technology,2009,32(12). |
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| Authors: | ZHANG Wei CHEN Jun CHEN Jian-meng |
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| Institution: | ZHANG Wei,CHEN Jun,CHEN Jian-meng* (School of Biological and Environmental Engineering,Zhejiang University of Technology,Hangzhou 310032,China) |
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| Abstract: | Rotating-drum biofilter (RDB) with good removal efficiency of nitrogen oxides is a new kind of exhausted gas treatment system.However previous experiments found that,to some extent,the mass transfer effect of NO in the RDB was reduced to decrease the removal efficiency due to low solubility of NO in water.While improving gas-liquid mass uansfer rate of NO Was the key step in whole process of denitrification degradation,ethylene diainine tewaacetic acid (EDTA)such as Cu~Ⅱ(EDTA),Fe~Ⅱ(EDTA),Mg~Ⅱ(EDTA)and Fe~Ⅱ(EDTA) was added into nutrient solution.With the combination of NO and EDTA,NO Can be dissolved in liquid quickly so that average removal efficiency of NO increased from 85%to 98%. |
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| Keywords: | EDTA biofiltration rotating-drum biofilter nitric oxide denitrification ethylene diamine teWaac etic acid(EDTA) |
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