Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria

刘晖; 孙彦富; 贾晓珊; 李军; 周康群; 屈向东; 陶雪琴; 陈瑜

doi:10.1016/S1004-9541(13)60465-6

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Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria

能源、资源与环境技术 | Updated：2026-01-06

- Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria
- Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria
- 中国化学工程学报（英文版） 2013年21卷第3期页码：332-3401004-954160465-6
- Affiliations：
  
  1. 2 Department of Environment Science and Engineering, Zhongkai University of Agriculture and Engineering,Guangzhou,China,510225
  2. 3 Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology,Beijing,China,100124
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(13)60465-6
  中图分类号：
- 纸质出版：2013
- Accepted：
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刘晖, 孙彦富, 贾晓珊, 等. Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria[J]. 中国化学工程学报（英文版）, 2013,21(3):332-3401004-954160465-6.

LIU Hui, SUN Yanfu, JIA Xiaoshan, LI Jun, ZHOU Kangqun, QU Xiangdong, TAO Xueqin, CHEN Yu. Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria[J]. Chin.J.Chem.Eng., 2013, 21(3): 332-340.
刘晖, 孙彦富, 贾晓珊, 等. Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria[J]. 中国化学工程学报（英文版）, 2013,21(3):332-3401004-954160465-6. DOI： 10.1016/S1004-9541(13)60465-6.

LIU Hui, SUN Yanfu, JIA Xiaoshan, LI Jun, ZHOU Kangqun, QU Xiangdong, TAO Xueqin, CHEN Yu. Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria[J]. Chin.J.Chem.Eng., 2013, 21(3): 332-340. DOI： 10.1016/S1004-9541(13)60465-6.

摘要

Abstract

To investigate the characteristics and metabolic mechanism of short-cut denitrifying phosphorus-removing bacteria (SDPB) that are capable of enhanced biological phosphorus removal (EBPR) using nitrite as an electron acceptor

an aerobic/anoxic sequencing batch reactor was operated under three phases. An SDPB-strain YC was screened after the sludge enrichment and was identified by morphological

physiological

biochemical properties and 16S rDNA gene sequence analysis. Denitrifying phosphorus-removing experiments were conducted to study anaerobic and anoxic metabolic mechanisms by analyzing the changes of chemical oxygen demand (COD)

phosphate

nitrite

poly-β-hydroxybutyrate (PHB)

and glycogen. The results show that strain YC is a non-fermentative SDPB similar to Paracoccus denitrificans. As a kind of non-fermentative bacteria

the energy of strain YC was mainly generated from phosphorus release (96.2%) under anaerobic conditions with 0.32 mg P per mg synthesized PHB. Under anoxic conditions

strain YC accumulated 0.45 mg P per mg degraded PHB

which produced most of energy for phosphate accumulation (91.3%) and a little for glycogen synthesis (8.7%). This metabolic mechanism of strain YC is different from that of tradition

al phosphorus-accumulating organisms (PAOs). It is also found that PHB

a kind of intracellular polymer

plays a very important role in denitrifying and accumulating phosphorus by supplying sufficient energy for phosphorous accumulation and carbon sources for denitrification. Therefore

monitoring ΔP/ΔPHB and? ΔNO

-N/ΔPHB is more necessary than monitoring ΔP/ΔCOD

?ΔNO

-N/ΔCOD

or ΔNO

-N.

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