| 污水生物脱氮过程中N_2O的产生和减量化控制 |
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| 引用本文： | 尚会来,PENG Yong-zhen,王淑莹,ZHANG Jing-rong.污水生物脱氮过程中N_2O的产生和减量化控制[J].中国给水排水,2008,24(16). |
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| 作者姓名： | 尚会来 PENG Yong-zhen 王淑莹 ZHANG Jing-rong |
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| 作者单位： | 北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京,100022 |
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| 基金项目： | 北京市属高等学校学术创新团队项目，北京市教委科研基地一科技创新平台项目，北京工业大学校科研和教改项目 |
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| 摘 要： | N2O是一种重要的温室气体,研究表明污水处理的硝化和反硝化过程是N2O的一个重要产生源.为此,介绍了污水生物脱氮硝化反硝化过程中N2O可能的产生机理和控制N2O减量的运行工况条件.目前污水脱氮过程中可能产生N2O的环节包括羟氨的氧化过程、硝酰基(NOH)的非生物反应、硝化菌反硝化过程、好氧反硝化菌作用和异养菌硝化过程.据研究,硝化过程中的高溶解氧(＞0.5 mg/L)、反硝化过程中尽量避免溶解氧的存在、高COD/N值(＞3.5)、较大的SRT(＞10 d)和适当的pH值(6.8～8)可以减少N2O的产生.另外,从污水处理运行工况和微生物种群优化两个角度提出了N2O的减量化控制策略.
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| 关 键 词： | 污水处理 减量化 |
Production and Reduction Control of Nitrous Oxide during Biological Nitrogen Removal from Domestic Wastewater |
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| SHANG Hui-lai,PENG Yong-zhen,WANG Shu-ying,ZHANG Jing-rong.Production and Reduction Control of Nitrous Oxide during Biological Nitrogen Removal from Domestic Wastewater[J].China Water & Wastewater,2008,24(16). |
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| Authors: | SHANG Hui-lai PENG Yong-zhen WANG Shu-ying ZHANG Jing-rong |
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| Affiliation: | SHANG Hui-lai,PENG Yong-zhen,WANG Shu-ying,ZHANG Jing-rong(Key Laboratory of Beijing for Water Quality Science , Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100022,China) |
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| Abstract: | Nitrous oxide(N2O)is an important greenhouse gas.The biological nitrification and denitrification are considered to be a major source of N2O in wastewater treatment processes.The production mechanism and affecting factors of the N2O production in biological nitrification and denitrification are introduced.The potential mechanism of the N2O production in biological wastewater treatment processes includes hydroxylamine oxidation,non-biological reaction of NOH,denitrification by nitrifier,the effect of aerobic... |
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| Keywords: | N2O |
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