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Long-term storage of aerobic granules in liquid media: Viable but non-culturable status

Chunli Wan, Qinlan Zhang, Duu-Jong Lee, Yayi Wang, Jieni Li

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

Long-term storage and successful reactivation after storage are essential for practical applications of aerobic granules on wastewater treatment. This study cultivated aerobic granules (SI) in sequencing batch reactors and then stored the granules at 4. °C in five liquid media (DI water (SW), acetone (SA), acetone/isoamyl acetate mix (SAA), saline water (SS), and formaldehyde (SF)) for over 1. year. The first four granules were then successfully reactivated in 24. h cultivation. The specific oxygen uptake rates (SOUR) of the granules followed SI. >. SS. >. SA. >. SAA. >. SW. >. SF; and the corresponding granular strengths (10. min ultrasound) followed SI. >. SA = SS. >. SAA. >. SW. >>. SF. During storage the granular cells secreted excess quantities of cyclic-diguanylate (c-di-GMP) and pentaphosphate (ppGpp) as responses to the stringent challenges. We proposed that to force cells in granules (Alphaproteobacteria, Flavobacteria, Betaproteobacteria, Gammaproteobacteria, Actinobacteria, Sphingobacteria, and Clostridia) entering viable but non-culturable (VBNC) status is the key of success for extended period storage of granules. © 2014 Elsevier Ltd.
Original languageEnglish
Pages (from-to)464-470
JournalBioresource Technology
Volume166
DOIs
Publication statusPublished - Aug 2014
Externally publishedYes

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)

  1. SDG 6 - Clean Water and Sanitation
    SDG 6 Clean Water and Sanitation

Research Keywords

  • Aerobic granules
  • High throughput sequencing
  • Signaling molecules
  • Storage
  • Viable but non-culturable status

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