碳源类型对反硝化除磷过程中N2O产生的影响机制

doi:10.6040/j.issn.1672-3961.0.2013.348

山东大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (5): 72-77.doi: 10.6040/j.issn.1672-3961.0.2013.348

碳源类型对反硝化除磷过程中N₂O产生的影响机制

郑楠¹, 李聪², 谢慧君³, 张建¹

1. 山东大学环境科学与工程学院, 山东济南 250100;
2. 聊城大学环境与规划学院, 山东聊城 252059;
3. 山东大学环境研究院, 山东济南 250100

收稿日期:2013-11-25 修回日期:2014-06-26 发布日期:2013-11-25
通讯作者: 张建(1976-), 男, 山东临沂人, 教授, 博士, 主要研究方向为污水生物/生态净化理论与技术.E-mail:zhangjian00@sdu.edu.cn E-mail:zhangjian00@sdu.edu.cn
作者简介:郑楠(1988-), 女, 安徽宿州人, 硕士研究生, 主要研究方向为污水生物处理技术.E-mail:sep0091@163.com
基金资助:
国家自然科学基金资助项目(21177075);山东省高等学校科技计划资助项目(J10LB08)

The mechanism of effect on N₂O production of carbon source types in denitrifying phosphorus removal process

ZHENG Nan¹, LI Cong², XIE Huijun³, ZHANG Jian¹

1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China;
2. School of Environment and Planning, Liaocheng University, Liaocheng 252059, Shandong, China;
3. Environmental Research Institute, Shandong University, Jinan 250100, Shandong, China

Received:2013-11-25 Revised:2014-06-26 Published:2013-11-25

摘要/Abstract

摘要： 以反硝化除磷过程中N₂O的减量化为目的,分别以乙酸、乙酸和丙酸的混合物、丙酸为碳源,研究了碳源类型对系统中N₂O产生的影响。结果表明:以乙酸为碳源时反硝化除磷过程中N₂O的产生量最多,以乙酸和丙酸混合物为碳源时N₂O产量次之,以丙酸为碳源时N₂O产量最少。使用乙酸、乙酸与丙酸混合物和丙酸为碳源时,N₂O产生量占总氮(TN)去除的比例分别为8.67%、1.48%和0.72%。不同碳源导致了系统反硝化进程的不同:以丙酸为碳源时,硝酸盐与亚硝酸盐还原速率比值最低,系统中几乎没有亚硝酸盐的积累;同时,在混合酸和丙酸系统中,聚3-羟基戊酸盐(poly-hydroxyvalerate, PHV)成为聚羟基烷酸酯(poly-β-hydroxyalkanoates,PHA)的主要成分,PHV量的增加导致N₂O产量减少。因此,以丙酸作为反硝化除磷系统的外加碳源对N₂O的减量化有明显优势,但该过程中系统对氮和磷的去除效果还需要进一步优化。

关键词: PHA, N₂O, 碳源, 反硝化酶活性, 反硝化除磷

Abstract: In order to reduce the N₂O production in denitrifying phosphorus removal process,the acetate, the mixture of acetate and propionate, and the propionate were used as carbon sources to study their effects on N₂O production in reaction systems. The results showed that in denitrifying phosphorus removal process, the production of N₂O was the most with acetate as carbon source, the second with the mixture of acetate and propionate as carbon source, and the lest with the propionate as carbon source. When use the acetate, the mixture of acetate and propionate, and the propionate as carbon sources, the ratio of N₂O production to the total nitrogen(TN)removal were 8.67%, 1.48% and 0.72% respectively. Different carbon sources resulted in different denitrification process. The ratio of nitrate reduction to nitrite reduction(N1/N2)in propionate system was the lowest, which indicated that there were a few of nitrite accumulated with the propionate as carbon source. At the same time, PHV was the main composition in total PHA in the mixed acid and propionate system. The increasing content of PHV declined the N₂O production. In conclusion, using propionate as carbon source in denitrifying phosphorus removal systems had a significant advantage to reduce the production of N₂O, while the effect of this process on removal of nitrogen and phosphorus still needed to be further optimized.

Key words: N₂O, denitrification enzyme activity, denitrifying phosphorus removal, carbon source, PHA

中图分类号:

X703.1

郑楠, 李聪, 谢慧君, 张建. 碳源类型对反硝化除磷过程中N₂O产生的影响机制[J]. 山东大学学报(工学版), 2014, 44(5): 72-77.

ZHENG Nan, LI Cong, XIE Huijun, ZHANG Jian. The mechanism of effect on N₂O production of carbon source types in denitrifying phosphorus removal process[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2014, 44(5): 72-77.

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碳源类型对反硝化除磷过程中N₂O产生的影响机制

The mechanism of effect on N₂O production of carbon source types in denitrifying phosphorus removal process

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