Summary
Parallel bench-scale activated sludge systems were operated using air or hydrogen peroxide as oxygen source. The use of H2O2 resulted in a temporary decrease of COD reduction, an increase of the catalase activity of the activated sludge, a depression of the nitrification, and a marked decrease of some filamentous organisms. Enumeration of some microbiologic groups indicated that the counts of enterobacteria, coliforms, staphylococci, and streptococci were lower in the H2O2 unit than in the parallel air unit. Also the use of H2O2 did not induce the selection of bacterial species that are more resistant to H2O2. The increase in catalase activity after H2O2 addition might be the result of a stimulation of catalase synthesis in catalase positive microorganisms.
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Abbreviations
- COD:
-
chemical oxygen demand, mg O2/1
- CODeff :
-
chemical oxygen demand of the effluent, mg O2/1
- DO:
-
dissolved oxygen, mg O2/1
- MLSS:
-
mixed liquor suspended solids, g dry weight/1
- SVI:
-
sludge volume index, ml settled sludge per liter/MLSS (ml/g)
- F:M:
-
sludge loading factor or the Food to Microorganisms ratio, g COD/g MLSS.day
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Houtmeyers, J., Poffé, R. & Verachtert, H. Hydrogen peroxide as a supplemental oxygen source for activated sludge: Microbiological investigations. European J. Appl Microbiol. 4, 295–305 (1977). https://doi.org/10.1007/BF00931267
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DOI: https://doi.org/10.1007/BF00931267