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SUMMARY:Granules formation at high salinity in upflow anaerobic sludge bla
 nket (UASB) reactors: five years of multidisciplinary research
DTSTART;VALUE=DATE-TIME:20210507T123000Z
DTEND;VALUE=DATE-TIME:20210507T143000Z
DTSTAMP;VALUE=DATE-TIME:20260311T064232Z
UID:indico-event-4@eventi.irsa.cnr.it
DESCRIPTION:\n\nSeminari IRSA-2021\n\nGranules formation at high salinity 
 in upflow anaerobic sludge blanket (UASB) reactors: five years of multidis
 ciplinary research\n\n \n\n \n\n\nM. CRISTINA GAGLIANO\n\nWetsus Netherl
 ands\n\nhttps://www.wetsus.nl/team-member/cristina-gagliano/\n\n\n \n\n 
                                                 
  \n\nThe treatment of saline effluents has been an emerging topic among r
 esearchers due to the large volumes generated by several human-made and in
 dustrial activities. The upflow anaerobic sludge blanket (UASB) reactor is
  an efficient technology to treat industrial wastewaters\, including salin
 e streams\, being an option to remove organics before desalination. In the
 se reactors\, microbial biomass spontaneously aggregates into granules\, b
 ut high Na+ concentrations are unfavourable for granules’ formation and 
 stability. Ca2+ addition may counteract this negative Na+ effect but at th
 e same time could hamper methanogenesis and mass-transfer in the granules.
 \n\nAlso (low amounts of) proteins in the feed can stimulate formation of 
 granules and improve their stability. Moreover\, the start-up inoculum use
 d for granules formation is one of the key factors in determining the proc
 ess performances when treating saline effluents via UASB reactors. In this
  seminar\, I present an overview of results of 5 years of research\, were 
 we did dive into many aspects of microbial granulation in saline condition
 s.\n\nWe were able to obtain fast granulation of anaerobic biomass from di
 spersed inoculum at Na+ concentrations of 5 and 20 g/L in UASB reactors. T
 he presence of a (adequate) protein source was fundamental for granules fo
 rmation\, while calcium addition could deteriorate performances over a cer
 tain concentration. The microbial community was dealing with salinity by p
 roducing an extracellular polymeric substance (EPS) able to bind sodium. W
 ithin the granules’ microbial community\, the key player was Methanotrix
  harundinacea\, reported here for the first time as a halotolerant methano
 gen\, able to excrete EPS and produce osmolytes and carotenoids in respons
 e to an increase of salinity. \n\n \n\nI partecipanti registrati ricever
 anno un link personale per connettersi mediante la piattaforma GoToMeeting
 .\n\n \n\nhttps://eventi.irsa.cnr.it/event/4/
LOCATION:
URL:https://eventi.irsa.cnr.it/event/4/
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