Polyhydroxybutyrate (PHB)-rich aerobic granule was cultivated in a sequencing batch reactor (SBR) under nitrogen deficient conditions by adapting a two-step strategy. In the first step the PHB-storage ability of activated sludge was enhanced by keeping both oxygen and ammonia at a low level. In the second step granular sludge was cultivated through adjusting sludge settling time. The matured PHB-rich granular sludge with a PHB content of 40 +/- 4.6% and a high settling ability was successfully obtained. The analysis on sludge surface properties showed that the surface charge, extracellular polymeric substances (EPS) content and the sludge hydrophobicity all increased significantly, while the surface energy of sludge decreased to a relatively steady state accompanied with the growth of granular sludge. This study demonstrates that the metabolism of intracellular storages induced microbial production of EPS, which favored the formation of aerobic granules. (c) 2014 Elsevier Ltd. All rights reserved.
机构:
Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Rosman, Noor Hasyimah
Anuar, Aznah Nor
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Univ Teknol Malaysia, WATER Res Alliance, Inst Environm & Water Resource Management, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Anuar, Aznah Nor
Othman, Inawati
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Othman, Inawati
Harun, Hasnida
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Harun, Hasnida
Sulong , Muhammad Zuhdi
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Sulong , Muhammad Zuhdi
Elias, Siti Hanna
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Elias, Siti Hanna
Hassan, Mohd Arif Hakimi Mat
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Hassan, Mohd Arif Hakimi Mat
Chelliapan, Shreesivadass
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Chelliapan, Shreesivadass
Ujang, Zaini
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Aligarh Muslim Univ, Fac Sci, Dept Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, IndiaAligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, India
Khan, Mohammad Zain
Mondal, Pijush Kanti
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Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, IndiaAligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, India
Mondal, Pijush Kanti
Sabir, Suhail
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Aligarh Muslim Univ, Fac Sci, Dept Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, IndiaAligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, India
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Rosman, Noor Hasyimah
Anuar, Aznah Nor
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Univ Teknol Malaysia, WATER Res Alliance, Inst Environm & Water Resource Management, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Anuar, Aznah Nor
Othman, Inawati
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Othman, Inawati
Harun, Hasnida
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Harun, Hasnida
Sulong , Muhammad Zuhdi
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Sulong , Muhammad Zuhdi
Elias, Siti Hanna
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Elias, Siti Hanna
Hassan, Mohd Arif Hakimi Mat
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Univ Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Hassan, Mohd Arif Hakimi Mat
Chelliapan, Shreesivadass
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Univ Teknol Malaysia, WATER Res Alliance, Inst Environm & Water Resource Management, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
Chelliapan, Shreesivadass
Ujang, Zaini
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Univ Teknol Malaysia, WATER Res Alliance, Inst Environm & Water Resource Management, Skudai 81310, Johor, MalaysiaUniv Teknol Malaysia, Fac Civil Engn, Dept Environm Engn, Skudai 81310, Johor, Malaysia
机构:
Aligarh Muslim Univ, Fac Sci, Dept Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, IndiaAligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, India
Khan, Mohammad Zain
Mondal, Pijush Kanti
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Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, IndiaAligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, India
Mondal, Pijush Kanti
Sabir, Suhail
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Aligarh Muslim Univ, Fac Sci, Dept Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, IndiaAligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Environm Res Lab, Aligarh 202002, Uttar Pradesh, India