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Automation of the acclimation phase in a sequencing batch reactor using dissolved oxygen regulation
Author(s) -
Vargas Alejandro,
Buitrón Germán
Publication year - 2008
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1002/btpr.19
Subject(s) - sequencing batch reactor , acclimatization , bioreactor , feed forward , biomass (ecology) , wastewater , sewage treatment , controller (irrigation) , airflow , batch reactor , pulp and paper industry , environmental science , chemistry , environmental engineering , biology , engineering , control engineering , ecology , biochemistry , mechanical engineering , agronomy , organic chemistry , catalysis
In this work, an automatic strategy for acclimation of biomass to toxic wastewater biodegradation in a sequencing batch reactor (SBR) is proposed and evaluated. It is based on monitoring the airflow needs for regulating the dissolved oxygen concentration at a desired set point. The regulation is achieved by using a PID controller with an input/output linearizing feedforward part, using the airflow rate as input variable. A simple algorithm to detect the end of the reaction phase using this manipulated signal is proposed. The strategy was tested on a laboratory bioreactor using 4‐chlorophenol as model toxic compound and two inocula from different sources. The results show that it is a viable alternative for automatic acclimation of biomass for toxic wastewater treatment in a SBR. Furthermore, the strategy is also suitable for the operation of the reactor after acclimation.