Granulation in UASB reactors

J. Dolfing*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

51 Citations (Scopus)


The state of knowledge on the microbiological aspects of granular methanogenic sludge in upflow anaerobic sludge blanket (UASB) reactors is reviewed. Granular methanogenic sludge has been observed in a variety of upflow reactors, which is in agreement with the hypothesis that these systems select for well settling sludges. In methanogenic UASB reactors various types of well settling sludges have been observed. Microscopic and kinetic evidence suggests that acetoclastic Methanothrix-like organisms play an important role in determining which type of sludge will develop under methanogenic condition. The mechanism of granulation still remains obscure. Extracellular material undoubtedly plays a major role as a matrix which keeps the cells together. Scanning electron microscopic evidence for the presence of extracellular material is available, but transmission electron microscopy has failed to validate the hypothesis that exopolysaccharides are the dominant components in this matrix

Original languageEnglish
Title of host publicationWater Science and Technology
Number of pages11
Publication statusPublished - 1986
Externally publishedYes
EventAnaerob Treat in Trop Countries, Proc of an IAWPRC Int Semin - Sao Paolo, Braz
Duration: 25 Aug 198629 Aug 1986


ConferenceAnaerob Treat in Trop Countries, Proc of an IAWPRC Int Semin
CitySao Paolo, Braz


Dive into the research topics of 'Granulation in UASB reactors'. Together they form a unique fingerprint.

Cite this