Effect of endogenous denitrification rate of domesticated GAOs on NO2--N and NO3--N

JIA Shuyuan; WANG Shuying; ZHAO Ji; LI Xiyao; ZHANG Qiong; PENG Yongzhen

doi:10.11949/j.issn.0438-1157.20170734

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Effect of endogenous denitrification rate of domesticated GAOs on NO₂^--N and NO₃^--N

更新时间：2025-12-10

- Effect of endogenous denitrification rate of domesticated GAOs on NO₂^--N and NO₃^--N
- CIESC Journal Issue 12, Pages: 4731-4738(2017)
- 作者机构：
  
  北京工业大学, 国家工程实验室, 北京市水质科学与水环境恢复工程重点实验室,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170734
  CLC： 703.1
- Online First：05 December 2017，
  
  Published：05 December 2017
- 稿件说明：
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JIA Shuyuan, WANG Shuying, ZHAO Ji, et al. Effect of endogenous denitrification rate of domesticated GAOs on NO₂^--N and NO₃^--N[J]. CIESC Journal, 2017, (12): 4731-4738. DOI: 10.11949/j.issn.0438-1157.20170734.
DOI：

JIA Shuyuan, WANG Shuying, ZHAO Ji, et al. Effect of endogenous denitrification rate of domesticated GAOs on NO₂^--N and NO₃^--N[J]. CIESC Journal, 2017, (12): 4731-4738. DOI: 10.11949/j.issn.0438-1157.20170734. DOI：

摘要

在序批式（sequencing batch reactor，SBR）反应器中，通过分段厌氧-好氧（厌氧后排水）运行方式，在以葡萄糖为碳源、P/C比小于2/100的条件下，成功实现了聚糖菌（glycogen accumulating organisms，GAOs）的驯化富集，厌氧段磷酸盐的释放量（phosphorus release amounts，PRA）稳定在1.0 mg·L-1以内，胞内糖原（glycogen，gly）含量是初始阶段的1.2倍。驯化后的GAOs分别以NO2--N、NO3--N为电子受体经厌氧-缺氧运行方式，可进行内源反硝化反应过程。GAOs在内源反硝化过程中依次利用胞内的聚β-羟基戊酸酯（poly-β-hydroxyvalerate，PHV）、聚β-羟基丁酸酯（poly-β-hydroxyvalerate，PHB）和gly作为内碳源。在22℃时，反硝化聚糖菌（denitrifying glycogen accumulating organisms，DGAOs）以NO2--N、NO3--N为电子受体平均比内源反硝化速率分别为0.067 g N·（g VSS）-1·d-1、0.023 g N·（g VSS）-1·d-1，常温短程内源反硝化速率约是全程内源反硝化速率的3倍。

Abstract

Glycogen accumulating organisms (GAOs) has been enriched in the anaerobic-aerobic sequencing batch reactor (AO-SBR) (drained after anaerobic) with glucose as the carbon source and the P/C ratio less than 2/100. PRA was less than 1.0 mg·L-1. The content of gly was 1.2 times the initial stage of GAOs enrichment. The domesticated GAOs cultured in anaerobic-anoxic operation could proceed endogenous denitrification reaction with NO2--N and NO3--N as endogenous carbon source. GAOs used intracellular poly-β-hydroxyvalerate (PHV)

poly-β-hydroxyvalerate (PHB) and glycogen (gly) in turns as carbon source in endogenous denitrification process. The average endogenous denitrification rate of DGAOs using NO2--N and NO3--N as electron acceptors were 0.067 g N·(g VSS)-1·d-1 and 0.023 g N·(g VSS)-1·d-1 at 22℃

respectively. Short-range endogenous denitrification rate was about three times as much as endogenous denitrification rate at normal temperature.

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