Author(s): M. Salaverría, A. Elías, A. Iturriarte, L. Gurtubay & S. Paunero
The aim of this work is to develop reliable and quick methods to quantify the
amount of active biomass in the aerobic reactor of a Wastewater Treatment Plant
The removal of pollutants contained in wastewaters is carried out by
several processes involving physical, chemical and biological treatments.
biological treatment renders the elimination of the organic matter and takes place
in aerobic reactors.
A constant concentration of microorganisms in the reactor
system ensures a high degradation performance, since an inappropriate biomass
amount would hinder the process efficiency.
Although the most used method to
control microorganisms’ growth is based on the measurement of the solids
content in the mixture, this simple determination has several drawbacks.
is a tedious procedure, which requires more than 24 h-performance, delaying the
decision-making and proper control of the sludge recirculation rate.
disadvantage is the lack of a standardized method for result calculation.
high solids content is not directly related to a big amount of active biomass.
this study, absorbance and turbidity have been selected as additional parameters
in order to obtain a reliable correlation between those optical parameters and dry
A quick measurement of absorbance or turbidity, related to the
quantity of solids in the sample, makes the decision-making easier in the
everyday operation of the plant.
WWTP, biomass, solids content, absorbance, turbidity, correlation.
Size: 3,233 kb
Paper DOI: 10.2495/SW100371
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