The influence of starvation phase on the properties and the development of aerobic granules

Z. H. Li, Takahiro Kuba, T. Kusuda

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

The current study was to evaluate the influence of starvation phase on surface negative charge, relative hydrophobicity, extra-cellular polymer substances (EPS) and the formation mechanism of aerobic granules. Granules with encouraging settling properties occurred in the reactor about 7 days after the inoculation. The surface negative charge decreased from 0.203 to 0.023 meq g VSS-1 and the relative hydrophobicity increased from 28.8 to 60.3% during the granulation period. Concentrations of protein and carbohydrate decreased from 18.0 to 7.1 and 7.0 to 2.9 mg g VSS-1, respectively in the first period. And from day 13, those values were observed in the range of 5.8-8.6 and 2.9-5.6 mg g VSS-1, respectively. The EPS especially protein concentrations well correlated with surface charge and relatively hydrophobicity. It was concluded that a reasonable amount of EPS should be controlled to form and maintain aerobic granules. It was proposed that aerobic granulation was initiated by starvation phase and then enhanced by anaerobic metabolism.

Original languageEnglish
Pages (from-to)670-674
Number of pages5
JournalEnzyme and Microbial Technology
Volume38
Issue number5
DOIs
Publication statusPublished - Mar 2 2006

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Hydrophobicity
Starvation
Hydrophobic and Hydrophilic Interactions
Polymers
Granulation
Anaerobiosis
Proteins
Surface charge
Carbohydrates
Metabolism

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Biochemistry
  • Applied Microbiology and Biotechnology

Cite this

The influence of starvation phase on the properties and the development of aerobic granules. / Li, Z. H.; Kuba, Takahiro; Kusuda, T.

In: Enzyme and Microbial Technology, Vol. 38, No. 5, 02.03.2006, p. 670-674.

Research output: Contribution to journalArticle

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