The role of autoinducer-2 in aerobic granulation using alternating feed loadings strategy

Supu Sun; Xiang Liu; Buyun Ma; Chunli Wan; Duu-Jong Lee

doi:10.1016/j.biortech.2015.11.032

The role of autoinducer-2 in aerobic granulation using alternating feed loadings strategy

Supu Sun, Xiang Liu^*, Buyun Ma, Chunli Wan, Duu-Jong Lee

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

48 Citations (Scopus)

Abstract

Quorum sensing (QS) plays an important role in aerobic granulation while how QS system regulates the formation of aerobic granules needs further discussion. This study cultivated activated sludge in two identical sequencing batch reactors (R1 and R2) at different influent organic loading rate (OLR) strategies: R1 was operated using constant OLR (around 8.0kg/m³d), while R2 was operated at alternating OLR (4.0-17.0kg/m³d). Microbial aggregates appeared in R2 on day 19, while the morphology of sludge in R1 changed little compared with the initial sludge. The concentration of autoinducer-2 (AI-2) in R2 showed an ascending trend, along with the increase of cell adhesiveness. The total extracellular polymeric substances (EPS) amount and large molecular weight EPS of R2 rose steadily, which was different from R1. Some bacteria able to self-aggregate and promote EPS secretion were exclusive in R2. A mechanism about aerobic granulation at alternating OLR was proposed.

Original language	English
Pages (from-to)	58-64
Journal	Bioresource Technology
Volume	201
DOIs	https://doi.org/10.1016/j.biortech.2015.11.032
Publication status	Published - 1 Feb 2016
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Research Keywords

Aerobic granulation
Alternating organic loading rate
Autoinducer-2
Cell adhesiveness
Extracellular polymeric substances (EPS)

Access Output

10.1016/j.biortech.2015.11.032

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{322ede23aa524695bedb9f391d9a557e,

title = "The role of autoinducer-2 in aerobic granulation using alternating feed loadings strategy",

abstract = "Quorum sensing (QS) plays an important role in aerobic granulation while how QS system regulates the formation of aerobic granules needs further discussion. This study cultivated activated sludge in two identical sequencing batch reactors (R1 and R2) at different influent organic loading rate (OLR) strategies: R1 was operated using constant OLR (around 8.0kg/m3d), while R2 was operated at alternating OLR (4.0-17.0kg/m3d). Microbial aggregates appeared in R2 on day 19, while the morphology of sludge in R1 changed little compared with the initial sludge. The concentration of autoinducer-2 (AI-2) in R2 showed an ascending trend, along with the increase of cell adhesiveness. The total extracellular polymeric substances (EPS) amount and large molecular weight EPS of R2 rose steadily, which was different from R1. Some bacteria able to self-aggregate and promote EPS secretion were exclusive in R2. A mechanism about aerobic granulation at alternating OLR was proposed.",

keywords = "Aerobic granulation, Alternating organic loading rate, Autoinducer-2, Cell adhesiveness, Extracellular polymeric substances (EPS)",

author = "Supu Sun and Xiang Liu and Buyun Ma and Chunli Wan and Duu-Jong Lee",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

year = "2016",

month = feb,

day = "1",

doi = "10.1016/j.biortech.2015.11.032",

language = "English",

volume = "201",

pages = "58--64",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - The role of autoinducer-2 in aerobic granulation using alternating feed loadings strategy

AU - Sun, Supu

AU - Liu, Xiang

AU - Ma, Buyun

AU - Wan, Chunli

AU - Lee, Duu-Jong

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Quorum sensing (QS) plays an important role in aerobic granulation while how QS system regulates the formation of aerobic granules needs further discussion. This study cultivated activated sludge in two identical sequencing batch reactors (R1 and R2) at different influent organic loading rate (OLR) strategies: R1 was operated using constant OLR (around 8.0kg/m3d), while R2 was operated at alternating OLR (4.0-17.0kg/m3d). Microbial aggregates appeared in R2 on day 19, while the morphology of sludge in R1 changed little compared with the initial sludge. The concentration of autoinducer-2 (AI-2) in R2 showed an ascending trend, along with the increase of cell adhesiveness. The total extracellular polymeric substances (EPS) amount and large molecular weight EPS of R2 rose steadily, which was different from R1. Some bacteria able to self-aggregate and promote EPS secretion were exclusive in R2. A mechanism about aerobic granulation at alternating OLR was proposed.

AB - Quorum sensing (QS) plays an important role in aerobic granulation while how QS system regulates the formation of aerobic granules needs further discussion. This study cultivated activated sludge in two identical sequencing batch reactors (R1 and R2) at different influent organic loading rate (OLR) strategies: R1 was operated using constant OLR (around 8.0kg/m3d), while R2 was operated at alternating OLR (4.0-17.0kg/m3d). Microbial aggregates appeared in R2 on day 19, while the morphology of sludge in R1 changed little compared with the initial sludge. The concentration of autoinducer-2 (AI-2) in R2 showed an ascending trend, along with the increase of cell adhesiveness. The total extracellular polymeric substances (EPS) amount and large molecular weight EPS of R2 rose steadily, which was different from R1. Some bacteria able to self-aggregate and promote EPS secretion were exclusive in R2. A mechanism about aerobic granulation at alternating OLR was proposed.

KW - Aerobic granulation

KW - Alternating organic loading rate

KW - Autoinducer-2

KW - Cell adhesiveness

KW - Extracellular polymeric substances (EPS)

UR - http://www.scopus.com/inward/record.url?scp=84948179649&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84948179649&origin=recordpage

U2 - 10.1016/j.biortech.2015.11.032

DO - 10.1016/j.biortech.2015.11.032

M3 - RGC 21 - Publication in refereed journal

C2 - 26638134

SN - 0960-8524

VL - 201

SP - 58

EP - 64

JO - Bioresource Technology

JF - Bioresource Technology

ER -

The role of autoinducer-2 in aerobic granulation using alternating feed loadings strategy

Abstract

Bibliographical note

UN SDGs

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this