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Effects of holding tank odor control chemicals on aerobic wastewater treatment
Three odor control chemicals and formaldehyde were
tested for detrimental affects on activated sludge using
bench-scale bioreactors. Slug fed and continuous flow
bioreactors were monitored for changes in suspended
solids, specific oxygen uptake rate, sludge settling and
compaction, and effluent COD. The biodegradability of
dyes and the generation of foam was also measured.
Formaldehyde and the formaldehydeÂ·based odor control
chemical 'Aqua-Kem" damaged the ability of activated
sludge to treat wastewater. They resulted in deceased
suspended solids concentrations and increased effluent
COD. Formaldehyde hinders the utilization of normal
wastewater substrate by activated sludge. The dye in
"Aqua-Kem" is not biodegradable, and surfactants in the
chemical generate foam.