Monitoring granular stability in an industrial UASB reactor treating brewery wa...

• Author(s): Araya-Kroff, P. ; Amaral, A. L. ; Ferreira, E. C. ; Silva, P. M. ; Mota, M. ; Alves, M. M.
• Date: 2004
• Persistent ID: http://hdl.handle.net/1822/2589
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): UASB; Granular stability; Image analysis
• Document Type: Conference Object
• Language: English

Description

An industrial scale UASB reactor treating a brewery wastewater was monitored during several months, in order to assess the usefulness of a morphological parameter relating the filaments length to the projected area of aggregates, LfA, to anticipate washout problems. It was observed that a selective washout of filamentous bacterial forms could explain the decrease of the acetoclastic and hydrogenophilic activity observed in the trial period. This selective washout was predicted by a peak in LfA that occurred just before a steady increase in the effluent VSS values.