| 以ORP作为SBR反硝化过程亚硝态氮积累过程控制参数 |
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| 引用本文： | 孙洪伟,魏东洋,时晓宁,杨庆,张树军,彭永臻,王淑莹.以ORP作为SBR反硝化过程亚硝态氮积累过程控制参数[J].北京工业大学学报,2010,36(10). |
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| 作者姓名： | 孙洪伟 魏东洋 时晓宁 杨庆 张树军 彭永臻 王淑莹 |
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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,北京,100124;环境保护部,华南环境科学研究所,广州,510655 |
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| 基金项目： | 国家自然科学基金资助项目，北京市自然科学基金资助重点项目 |
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| 摘 要： | 为避免序批式活性污泥法(SBR)工艺生物脱氮反硝化过程毒性更大的亚硝态氮(NO2--N)排入受纳水体,以缺氧/厌氧上流式厌氧污泥流化床(UASB)预处理的实际垃圾填埋场渗滤液为研究对象,考察了以氧化还原电位(ORP)作为SBR反硝化过程NO2--N积累控制参数的可行性.结果表明:对于4种不同N初始的ρ(NO3--N),NO 2--N均实现明显积累,积累速率分别为0.117、0.136、0.235、0.068/d.反应过程中,ORP曲线先后出现NO 3--N和NO 2--N拐点,表明硝态氮和亚硝态氮还原反应结束.对于有明显亚硝态氮积累的反硝化过程,仅以NO 3--N作为反硝化速率(rDN)的单值函数是不准确的,应以总氧化态氮计,如以NO 3--N作为底物,将其定义为"名义"rDN.温度分别为14.2、13.9℃低温,5种不同n(C)/n(N)条件下,亚硝态氮均积累,亚硝态氮峰值点为速率平衡点.当n(C)/n(N)低于理论值时,相对NOx--N→N2的全程反硝化碳源不充足,但相对于NO3--N→NO2--N的转化碳源充足.
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| 关 键 词： | 垃圾渗滤液 氧化还原电位(ORP) 反硝化 亚硝态氮积累 序批式活性污泥法(SBR) |
ORP Used for Process Control Parameter for Nitrite Accumulation in SBR Denitrification |
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| SUN Hong-wei,WEI Dong-yang,SHI Xiao-ning,YANG Qing,ZHANG Shu-jun,PENG Yong-zhen,WANG Shu-ying.ORP Used for Process Control Parameter for Nitrite Accumulation in SBR Denitrification[J].Journal of Beijing Polytechnic University,2010,36(10). |
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| Authors: | SUN Hong-wei WEI Dong-yang SHI Xiao-ning YANG Qing ZHANG Shu-jun PENG Yong-zhen WANG Shu-ying |
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| Affiliation: | SUN Hong-wei1,WEI Dong-yang2,SHI Xiao-ning1,YANG Qing1,ZHANG Shu-jun1,PENG Yong-zhen1,WANG Shu-ying1 ( 1. Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100124,China,2. South China Institute of Environmental Sciences,Ministry of Environmental Protection,Guangzhou 510655,China) |
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| Abstract: | In order to avoid the discharge of nitrite into the receiving water body,the feasibility of using the oxidation reduction potential ( ORP) as control parameters for nitrite accumulation in SBR denitrification for the treatment of leachate via anoxic/anaerobic UASB,was investigated. Experimental results show that under the four different initial NO 3- -N concentration used, nitrite accumulation is observed obviously in SBR denitrification. It also concludes that the nitrite accumulation rate is 0. 117,0. 136... |
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| Keywords: | landfill leachate oxidization-redox potential ( ORP ) denitrification nitrite accumulation sequencing batch reactor ( SBR) |
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