Abstract :
[en] The activated sludge process is a complex microbial
system used for biological wastewater treatment, i.e.,
carbon and ammonium removal. The main control objective
is to regulate the outflow water quality despite disturbances
in the inflow, such as influent flow, or influent concentration.
The alternate phase process consists of a single bioreactor
where oxygen is supplied intermittently to create nitrification
and denitrification conditions while the biomass is recycled
continuously from a settler. In this study, a switched affine
model is first derived from an existing dynamic model. Then,
a switching signal law and a feedback control are developed to
reduce the ammonium concentration while keeping the closedloop
system stable. The proposed control strategy is validated in
simulation with MATLAB/Simulink considering several influent
scenarios such as dry, rainy, and stormy weather conditions.
Scopus citations®
without self-citations
1