外碳源投量对亚硝酸型反硝化过程N2O释放影响

吕永涛; 闫建平; 张瑶; 刘婷; 曾玉莲; 王磊

doi:10.11918/j.issn.0367-6234.201612121

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外碳源投量对亚硝酸型反硝化过程N2O释放影响

更新时间：2026-10-19

- 外碳源投量对亚硝酸型反硝化过程N2O释放影响
- Effect of external carbon source dosage on N2O emission from denitrification using nitrite as the electron acceptor
- 哈尔滨工业大学学报 2018年50卷第8期页码：39-44
- 作者机构：
  
  西安建筑科技大学环境与市政工程学院,陕西省膜分离重点实验室,西安,710055
- 作者简介：
- 基金信息：
  
  国家自然科学基金(51108367);陕西省建设厅科技发展计划项目(2015-K61)
- DOI：10.11918/j.issn.0367-6234.201612121
  中图分类号： X703.1
- 纸质出版：2018
- 稿件说明：
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吕永涛, 闫建平, 张瑶, 等. 外碳源投量对亚硝酸型反硝化过程N2O释放影响[J]. 哈尔滨工业大学学报, 2018,50(8):39-44.

L, Yongtao, YAN Jianping, et al. Effect of external carbon source dosage on N2O emission from denitrification using nitrite as the electron acceptor[J]. 2018, 50(8): 39-44.
吕永涛, 闫建平, 张瑶, 等. 外碳源投量对亚硝酸型反硝化过程N2O释放影响[J]. 哈尔滨工业大学学报, 2018,50(8):39-44. DOI： 10.11918/j.issn.0367-6234.201612121.

L, Yongtao, YAN Jianping, et al. Effect of external carbon source dosage on N2O emission from denitrification using nitrite as the electron acceptor[J]. 2018, 50(8): 39-44. DOI： 10.11918/j.issn.0367-6234.201612121.

摘要

为实现N2O的减量化控制或资源化利用，接种普通活性污泥，以乙酸钠和硝酸盐为基质，通过淘洗反硝化聚磷菌，在SBR中以厌氧/缺氧交替运行的方式启动內源反硝化，单周期内约50%的NO3--N转化为NO2--N，N2O释放速率随着亚硝酸的积累逐渐增大，N2O转化率(释放量占TN去除的比例)为2.04%.在此基础上，分别取缺氧末和厌氧末污泥，对比研究胞内聚合物PHB合成前后，外碳源投加量(碳氮比为0，0.75和2.50)对亚硝酸型反硝化过程N2O释放特性的影响，结果表明，外碳源存在时，N2O释放量随总碳源的增加呈略微减少的趋势，转化率在0.24%~1.61%；而当仅利用內源物质进行反硝化时，N2O的转化率高达15.90%，单位SS最大释放速率达71.29 μg/(min·g)，释放量是其余条件下的14~26倍.表明单独利用PHB进行亚硝酸型反硝化会大幅增加N2O的释放.

Abstract

To eliminate N2O emission or utilize it for energy recovery

a laboratory-scale SBR inoculated with common activated sludge with acetate and nitrate additions decoupled

was conducted for endogenous denitrification running with anaerobic/anoxic cycles without DPAOs. During one cycle

approximately 50% of nitrate was converted to nitrite

N2O emission rate increased with nitrite accumulation

and 2.04% of removed nitrogen was emitted as nitrous oxide (N2O). Batch tests were conducted to compare the emission of N2O that was influenced by external carbon source dosage (C/N was 0

0.75 and 2.50) using nitrite as the electron acceptor before and after poly-β-hydroxybutyrate (PHB) was synthesized.The results showed that

the N2O emission was slightly decreased with the increase of total carbon source

and the N2O conversion ratio was between 0.24% and 1.61%. 15.90% of N2O conversion ratio was obtained in the absence of external organic carbon

the maximum N2O emission rate was 71.29 μg/(min·g)

and the N2O emission was 14-26 times higher than that of the other batch test results

indicating that when the PHB was the sole electron donor

the endogenous denitrification could produce more N2O using nitrite as the electron acceptor.

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