Granulation and sludge bed stability in upflow anaerobic sludge bed reactors in relation to surface thermodynamics.

Applied and Environmental Microbiology
J ThaveesriWilly Verstraete

Abstract

Adhesion of bacteria involved in anaerobic consortia was investigated in upflow anaerobic sludge bed reactors and was related to surface thermodynamics. The adhesion of hydrophilic cells appeared to be enhanced at a low liquid surface tension ((gamma)(infLV)), while the adhesion of hydrophobic cells was favored at a high (gamma)(infLV). Growth in protein-rich growth media resulted in low granular biomass yields; addition of polycations, such as poly-l-lysine and chitosan, increased the (gamma)(infLV) and the granular biomass yield. On the basis of the results of activity tests and microbial counts with wash-out cells, we identified two types of structured granules that were related to the influence of (gamma)(infLV). In one type of granules, hydrophilic acidogens surrounded a more hydrophobic methanogenic association. These granules were selected at a low (gamma)(infLV) provided that carbohydrates were available as substrates. The other type of granules was selected at a high (gamma)(infLV); hydrophobic cells (i.e., methanogens) were predominant throughout these granules. The granules which had acidogens as solid-phase emulsifiers around a methanogenic association appeared to allow more stable reactor performance. Decreasing th...Continue Reading

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Citations

Nov 24, 2006·Water Environment Research : a Research Publication of the Water Environment Federation·Chudapak KaseamchochoungChantaraporn Phalakornkule
Sep 17, 2020·Soft Matter·Narendra K Dewangan, Jacinta C Conrad
Aug 23, 2007·Water Environment Research : a Research Publication of the Water Environment Federation·Sittpong LertsittichaiChantaraporn Phalakornkule
Sep 1, 2009·Microbial Biotechnology·M Madalena AlvesAlfons J M Stams
May 1, 1996·World Journal of Microbiology & Biotechnology·W VerstraeteP Lens
Mar 25, 2009·Applied Microbiology and Biotechnology·Pieter Van den AbbeeleTom Van de Wiele
Oct 27, 2017·Environmental Technology·A GilM A Martín
Apr 20, 1997·Biotechnology and Bioengineering·B Tartakovsky, S R Guiot
Dec 19, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Qais H Banihani, Jim A Field
Mar 1, 1997·Applied and Environmental Microbiology·A Zita, M Hermansson
Jun 3, 2021·International Journal of Environmental Research and Public Health·Keisy TorresPaula Marzal
Mar 16, 2004·Water Research·L W Hulshoff PolP N L Lens
Aug 2, 2005·Bioresource Technology·Sunny AiyukWilly Verstraete
Oct 26, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Narendra K Dewangan, Jacinta C Conrad

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