SECRETORY CHARACTERISTICS OF EPS AND THE SIGNAL MOLECULES RELEASE UNDER DIFFERENT ORGANIC LOADING

LI Yajing; WANG Shaopo; LIU Lu; JIA Liyuan

doi:10.13205/j.hjgc.202202008

Volume 40 Issue 2

Apr. 2022

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LI Yajing, WANG Shaopo, LIU Lu, JIA Liyuan. SECRETORY CHARACTERISTICS OF EPS AND THE SIGNAL MOLECULES RELEASE UNDER DIFFERENT ORGANIC LOADING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 47-52. doi: 10.13205/j.hjgc.202202008

Citation:

LI Yajing, WANG Shaopo, LIU Lu, JIA Liyuan. SECRETORY CHARACTERISTICS OF EPS AND THE SIGNAL MOLECULES RELEASE UNDER DIFFERENT ORGANIC LOADING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 47-52. doi: 10.13205/j.hjgc.202202008

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SECRETORY CHARACTERISTICS OF EPS AND THE SIGNAL MOLECULES RELEASE UNDER DIFFERENT ORGANIC LOADING

doi: 10.13205/j.hjgc.202202008

LI Yajing^{1,2
,
,},
WANG Shaopo^1,2,
LIU Lu^1,2,
JIA Liyuan³

1. School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China;
2. Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China;
3. Tianjin IKWEN Water Treatment Co., Ltd, Tianjin 300000, China

Received Date: 2021-03-19
Available Online: 2022-04-02
Publish Date: 2022-04-02

Abstract

Abstract

The secretion characteristics of extracellular polymers(EPS) and the release of acylated homoserine lactones(AHLs) were investigated under three organic loading conditions [0.29, 0.58, 1.16 kg COD/(m³·d)] in continuous flow A²/O system. The results showed that TB-EPS was the main component of EPS, which had higher molecular weight and wider molecular weight distribution. The effect of organic loading on the components of LB-EPS was greater than that of TB-EPS. The increasing trend of polysaccharide(PS) content in LB-EPS was more obvious than that of protein(PN) with the increase of organic loading, making the sludge system have stronger settling property under high organic loading. The content and species of AHLs under different organic loads were significantly different. C10-HSL, C12-HSL and C14-HSL were dominant in sludge system. The correlation between AHLs and LB-EPS was weak, and there were significant or strong correlations between many types of AHLs and TB-EPS, which provided theoretical support for AHLs regulating EPS synthesis to achieve stable operation of the system.
- organic loading,
- settleability,
- nitrogen and phosphorus removal,
- extracellular polymeric substance(EPS),
- acylated homoserine lactones(AHLs)

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References(24)

References

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