Water Science & Technology: Water Supply Vol 1 No 2 pp 151–158 © IWA Publishing 2001
Metabolic activity test in investigation of biodegradation in biological
filters
E Kijowska*, M Leszczyńska** and MM Sozański***
*
Institute of Environmental Engineering, Poznań University of
Technology, ul. Piotrowo 5, 560-965 Poznań, Poland
**
Institute of Environmental Engineering, Poznań University of
Technology, ul. Piotrowo 5, 560-965 Poznań, Poland
(E-mail: leszcz@sol.put.poznan.pl)
***
Institute of Environmental Engineering, Poznań University of
Technology, ul. Piotrowo 5, 560-965 Poznań, Poland
ABSTRACT
The esterase activity (EA) metabolic activity test was shown to be
applicable to measurement of the activity of biomass of biofilters. The
method was reproducible and detected significant differences in biomass
activity in different filters and at various depths within each filter.
The highest biomass activity occurred at the bed surface in 60% of filter
media. The EA test also revealed the changes of biomass activity during
the time of filter operation as a result of backwashing. For all
investigated filters maximum biomass activity in the middle of washing
cycle was observed. Following backwashing, the activity dropped to a
minimum. The relation between TOC (total organic carbon) and COD (chemical
oxygen demand) removal and biomass activity were noted. The results
presented in the paper suggest that the metabolic activity test can
be used in investigation of the performance of biofilters.
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