Accelerated aerobic granulation using alternating feed loadings: Alginate-like exopolysaccharides

•Alternating OLR feeding is applied to accelerate aerobic granulation.•Increase in OLR stimulates the cells to secret c-di-GMP to produce ALE.•Excess ALE with subsequent shearing forms aerobic granules.•Fraction of building blocks in ALE does not affect granulation. Alginate-like exopolysaccharides...

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Veröffentlicht in:Bioresource technology 2014-11, Vol.171, p.360-366
Hauptverfasser: Yang, Ya-Chun, Liu, Xiang, Wan, Chunli, Sun, Supu, Lee, Duu-Jong
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container_title Bioresource technology
container_volume 171
creator Yang, Ya-Chun
Liu, Xiang
Wan, Chunli
Sun, Supu
Lee, Duu-Jong
description •Alternating OLR feeding is applied to accelerate aerobic granulation.•Increase in OLR stimulates the cells to secret c-di-GMP to produce ALE.•Excess ALE with subsequent shearing forms aerobic granules.•Fraction of building blocks in ALE does not affect granulation. Alginate-like exopolysaccharides (ALE) likely contribute markedly to strength of aerobic granules. This study cultivated aerobic granules from propionate wastewaters using strategies with different organic loading rates (OLRs) (4.4–17.4kg/m3-d). When the OLR increased suddenly, the constituent cells (Pseudomonas, Clostridium, Thauera and Arthrobacter) were stimulated to secret extracellular cyclic diguanylate (c-di-GMP) and produced excess ALE, which formed a large quantity of sticky materials that served as the precursor of aerobic granules. Formation of excess ALE was the prerequisite for accelerated granulation. Conversely, this study observed no enrichment of poly guluronic acid blocks in ALE during granulation.
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Alginate-like exopolysaccharides (ALE) likely contribute markedly to strength of aerobic granules. This study cultivated aerobic granules from propionate wastewaters using strategies with different organic loading rates (OLRs) (4.4–17.4kg/m3-d). When the OLR increased suddenly, the constituent cells (Pseudomonas, Clostridium, Thauera and Arthrobacter) were stimulated to secret extracellular cyclic diguanylate (c-di-GMP) and produced excess ALE, which formed a large quantity of sticky materials that served as the precursor of aerobic granules. Formation of excess ALE was the prerequisite for accelerated granulation. 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Psychology</subject><subject>Granulation</subject><subject>Microscopy, Electron, Scanning</subject><subject>Molecular Sequence Data</subject><subject>Polymerase Chain Reaction</subject><subject>Polysaccharides, Bacterial - metabolism</subject><subject>Propionates - analysis</subject><subject>RNA, Ribosomal, 16S - genetics</subject><subject>Sequence Analysis, DNA</subject><subject>Waste Disposal, Fluid - methods</subject><subject>Waste Water - chemistry</subject><subject>Waste Water - microbiology</subject><subject>Water Purification - methods</subject><issn>0960-8524</issn><issn>1873-2976</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkMtu1DAUQC0EotPCL1TZIHWT4LcdVh1VtEWqxAbWlmPfTD144sFOEP17PJppu2Rl-_rc10HokuCOYCI_b7shpDyDe-woJrzDusM9fYNWRCvW0l7Jt2iFe4lbLSg_Q-elbDHGjCj6Hp1RQYmmWK-QXTsHEbKdwTcWchqCazbZTku0c0hTs5QwbRobZ8hTjdT7CBWNyfr6KF-addyE-gNtDL-ggb9pn-JTsc492hw8lA_o3WhjgY-n8wL9vP364-a-ffh-9-1m_dA6LvncUhBWeOG49773XCvlueCDABBq9JLgATvlGcXgrcNCKs5Gz8kwuF4QOTJ2ga6Odfc5_V6gzGYXSt0t2gnSUgwRUmpKlCQVlUfU5VRKhtHsc9jZ_GQINge9Zmue9ZqDXoO1qXpr4uWpxzLswL-kPfuswKcTYIuzcawiXSivnNaMCXbgro8cVCN_AmRTXIDJgQ8Z3Gx8Cv-b5R88Pp5G</recordid><startdate>20141101</startdate><enddate>20141101</enddate><creator>Yang, Ya-Chun</creator><creator>Liu, Xiang</creator><creator>Wan, Chunli</creator><creator>Sun, Supu</creator><creator>Lee, Duu-Jong</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20141101</creationdate><title>Accelerated aerobic granulation using alternating feed loadings: Alginate-like exopolysaccharides</title><author>Yang, Ya-Chun ; Liu, Xiang ; Wan, Chunli ; Sun, Supu ; Lee, Duu-Jong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c464t-2e5a5d5c4ddd9d4877d454b5ee57fd610b0c7d320edac056743fd41bbc9516f33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Alginate-like exopolysaccharides</topic><topic>Alginates - metabolism</topic><topic>Alternating loading</topic><topic>Bacteria - metabolism</topic><topic>Bacteria - ultrastructure</topic><topic>Bacterial Adhesion - physiology</topic><topic>Base Sequence</topic><topic>Biological and medical sciences</topic><topic>c-di-GMP</topic><topic>Chromatography, High Pressure Liquid</topic><topic>Cyclic GMP - analogs &amp; derivatives</topic><topic>Cyclic GMP - metabolism</topic><topic>Denaturing Gradient Gel Electrophoresis</topic><topic>DNA Primers - genetics</topic><topic>Fundamental and applied biological sciences. 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subjects Alginate-like exopolysaccharides
Alginates - metabolism
Alternating loading
Bacteria - metabolism
Bacteria - ultrastructure
Bacterial Adhesion - physiology
Base Sequence
Biological and medical sciences
c-di-GMP
Chromatography, High Pressure Liquid
Cyclic GMP - analogs & derivatives
Cyclic GMP - metabolism
Denaturing Gradient Gel Electrophoresis
DNA Primers - genetics
Fundamental and applied biological sciences. Psychology
Granulation
Microscopy, Electron, Scanning
Molecular Sequence Data
Polymerase Chain Reaction
Polysaccharides, Bacterial - metabolism
Propionates - analysis
RNA, Ribosomal, 16S - genetics
Sequence Analysis, DNA
Waste Disposal, Fluid - methods
Waste Water - chemistry
Waste Water - microbiology
Water Purification - methods
title Accelerated aerobic granulation using alternating feed loadings: Alginate-like exopolysaccharides
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