New method for assessment of biocide efficacy on filamentous bulking sludge
1999
Seka, M.A. | Hammes, F. | Kielemoes, J. | Verstraete, W. (University of Gent (Belgium). Faculty of Agricultural and Applied Biological Sciences. Lab. of Microbial Ecology and Technology)
Rapid and definite assessment of the effect that a specific biocide has on a specific case of filamentous bulking sludge is a much-needed tool in activated sludge wastewater treatment. The Live/Dead staining technique (LIVE/DEAD BacLight), enabling to distinguish between "living" and "non-living" micro-organisms, was examined as a fool for the assessment of biocide efficiency on filamentous bulking sludge. A good concord was obtained between staining results, the oxygen uptake rate (OUR) measurements and the performance of the sludge after 24-h incubation subsequently to biocide application. As a result, the staining technique appears to be a very relevant tool for a thorough assessment of biocide's efficacy on filamentous bulking sludge.
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