The stability of a fed-batch bioreactor operated with a new control strategy (ED-TOC) during a long-term period was evaluated. The ED-TOC strategy uses solely measurements of DO concentration and volume of the reactor to control the influent flow rate, and so the substrate degradation rate oscillates around its maximal value during the whole filling phase. The bioreactor was tested for the degradation of a wastewater containing 4-chlorophenol (4CP) as a model of an inhibitory compound. The experiment was conducted twice in order to investigate whether results were reproducible. Each set of experiments consisted of two phases: acclimation of the biomass to 4-chlorophenol and operation using the ED-TOC strategy. The main conclusion is that the reactor operated by the ED-TOC strategy is robust and stable in large operation periods. Degradation efficiencies greater than 99% as 4CP and greater than 97% as COD degradation were obtained. Toxicity analysis demonstrates that the bioreactor operated by ED-TOC eliminates the toxicity in the wastewater. Community analysis by DGGE was also conducted.
Research Article|June 01 2008
Performance of an optimally filled discontinuous bioreactor degrading 4-chlorophenol
1Laboratory of Advanced Processes for Water Treatment, Instituto de Ingenieria Campus Juriquilla, Queretaro. Universidad Nacional Autonoma de Mexico, Blvd. Juriquilla 3001, Queretaro 76230, Mexico
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Water Sci Technol (2008) 57 (12): 1991-1997.
Iván Moreno-Andrade, Germán Buitrón; Performance of an optimally filled discontinuous bioreactor degrading 4-chlorophenol. Water Sci Technol 1 June 2008; 57 (12): 1991–1997. doi: https://doi.org/10.2166/wst.2008.317
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