Role of microorganism growth phase in the accumulation and characteristics of biomacromolecules (BMM) in a membrane bioreactor

Zhongbo Zhou; Fangang Meng; Shuang Liang; Bing-Jie Ni; Xiaoshan Jia; Shiyu Li; Yankai Song; Guocheng Huang

doi:10.1039/c1ra00420d

Role of microorganism growth phase in the accumulation and characteristics of biomacromolecules (BMM) in a membrane bioreactor

Zhongbo Zhou, Fangang Meng, Shuang Liang, Bing-Jie Ni, Xiaoshan Jia, Shiyu Li, Yankai Song, Guocheng Huang

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Abstract

The objective of this study was to highlight the significance of microorganism growth on the production of biomacromolecules (BMM) in a membrane bioreactor (MBR). During the MBR operation, both polysaccharides and proteins in the sludge supernatant were found to increase steadily in exponential growth phase (EGP) due to higher organic loading rates and microbial primary metabolism. Subsequently, both increased continuously and then decreased sharply in the following deceleration growth phase (DGP). Finally, the BMM maintained a low and steady level as the sludge reached stationary growth phase (SGP). The results of batch experiments showed that the sludge under DGP was prone to produce much more BMM than that under SGP as a result of a nutrients decrease and higher microbial secondary metabolism activities. Furthermore, large-molecular weight (MW) compounds (>100 kDa) made up the majority of BMM in the EGP and DGP. In contrast, the small-MW compounds (

Original language	English
Journal	R S C Advances
Volume	2
Issue number	2
Pages (from-to)	453-460
ISSN	2046-2069
DOIs	https://doi.org/10.1039/c1ra00420d
Publication status	Published - 2012

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title = "Role of microorganism growth phase in the accumulation and characteristics of biomacromolecules (BMM) in a membrane bioreactor",

abstract = "The objective of this study was to highlight the significance of microorganism growth on the production of biomacromolecules (BMM) in a membrane bioreactor (MBR). During the MBR operation, both polysaccharides and proteins in the sludge supernatant were found to increase steadily in exponential growth phase (EGP) due to higher organic loading rates and microbial primary metabolism. Subsequently, both increased continuously and then decreased sharply in the following deceleration growth phase (DGP). Finally, the BMM maintained a low and steady level as the sludge reached stationary growth phase (SGP). The results of batch experiments showed that the sludge under DGP was prone to produce much more BMM than that under SGP as a result of a nutrients decrease and higher microbial secondary metabolism activities. Furthermore, large-molecular weight (MW) compounds (>100 kDa) made up the majority of BMM in the EGP and DGP. In contrast, the small-MW compounds (",

author = "Zhongbo Zhou and Fangang Meng and Shuang Liang and Bing-Jie Ni and Xiaoshan Jia and Shiyu Li and Yankai Song and Guocheng Huang",

year = "2012",

doi = "10.1039/c1ra00420d",

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journal = "R S C Advances",

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T1 - Role of microorganism growth phase in the accumulation and characteristics of biomacromolecules (BMM) in a membrane bioreactor

AU - Zhou, Zhongbo

AU - Meng, Fangang

AU - Liang, Shuang

AU - Ni, Bing-Jie

AU - Jia, Xiaoshan

AU - Li, Shiyu

AU - Song, Yankai

AU - Huang, Guocheng

PY - 2012

Y1 - 2012

N2 - The objective of this study was to highlight the significance of microorganism growth on the production of biomacromolecules (BMM) in a membrane bioreactor (MBR). During the MBR operation, both polysaccharides and proteins in the sludge supernatant were found to increase steadily in exponential growth phase (EGP) due to higher organic loading rates and microbial primary metabolism. Subsequently, both increased continuously and then decreased sharply in the following deceleration growth phase (DGP). Finally, the BMM maintained a low and steady level as the sludge reached stationary growth phase (SGP). The results of batch experiments showed that the sludge under DGP was prone to produce much more BMM than that under SGP as a result of a nutrients decrease and higher microbial secondary metabolism activities. Furthermore, large-molecular weight (MW) compounds (>100 kDa) made up the majority of BMM in the EGP and DGP. In contrast, the small-MW compounds (

AB - The objective of this study was to highlight the significance of microorganism growth on the production of biomacromolecules (BMM) in a membrane bioreactor (MBR). During the MBR operation, both polysaccharides and proteins in the sludge supernatant were found to increase steadily in exponential growth phase (EGP) due to higher organic loading rates and microbial primary metabolism. Subsequently, both increased continuously and then decreased sharply in the following deceleration growth phase (DGP). Finally, the BMM maintained a low and steady level as the sludge reached stationary growth phase (SGP). The results of batch experiments showed that the sludge under DGP was prone to produce much more BMM than that under SGP as a result of a nutrients decrease and higher microbial secondary metabolism activities. Furthermore, large-molecular weight (MW) compounds (>100 kDa) made up the majority of BMM in the EGP and DGP. In contrast, the small-MW compounds (

U2 - 10.1039/c1ra00420d

DO - 10.1039/c1ra00420d

M3 - Journal article

SN - 2046-2069

VL - 2

SP - 453

EP - 460

JO - R S C Advances

JF - R S C Advances

IS - 2

ER -

Role of microorganism growth phase in the accumulation and characteristics of biomacromolecules (BMM) in a membrane bioreactor

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