Biodegradation of polychlorinated biphenyls using biofilm grown with biphenyl as carbon source in fluidized bed reactor

Biological treatment of polychlorinated biphenyls (PCBs) contaminated transformer oil by anaerobic–aerobic sequencing batch biofilm reactors

“…Generally, in accordance with the previous studies our results demonstrated that microorganisms were more cable of metabolizing high-chlorinated Aroclors under anaerobic conditions than aerobic conditions. Although, only few studies report the use of biofilm to degrade PCBs (Mukerjee-Dhar et al, 1998;Kuncova et al, 2002;Borja et al, 2006), application of biofilms as an alternative in the degradation of PCBs offers some advantages such as the presence of large microbial diversity in a stable form (Borja et al, 2006). In overall, sequential anaerobice aerobic SBBR achieved successfully the biodegradation of highly chlorinated biphenyls more than 99.9% at high OLR of 21.5 g COD/L.d.…”

“…Since, the main mixture of PCBs in transformer oils is high chlorinated compounds including Aroclor 1260 and 1254 (Rojas-Avelizapa et al, 1999;Martínez et al, 2005), sequential anaerobiceaerobic treatment is expected to provide complete biodegradation of PCBs contaminated transformer oils (Tartakovsky et al, 2001). There are several study about the biodegradation and bioremediation of PCBs (Fedi et al, 2001;Borja et al, 2006;Adebusoye et al, 2008;Dercová et al, 2008;Hatamian-Zarmi et al, 2009;Bertin et al, 2011). Most of the studies focused on batch cultures involving pure cultures or mixture of bacteria in laboratory media containing a single PCBs congener or an individual Aroclor.…”

“…Gas chromatograph analysis of Aroclor 1242 following 4 days incubation showed about 73% degradation of PCBs. In the other study, Borja et al (2006) investigated biodegradation of polychlorinated biphenyls using biofilm grown in a fluidized bed reactor. Based on our knowledge, however, there is no study about the biological treatment of PCBs contaminated transformer oils in biological reactors.…”

Memory Effect of Aquatic Biofilms in the Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) and Polychlorinated Biphenyls (PCBs) in Water Streams

“…This is in agreement with the model presented here. 2 packed bed column reactor [64] 0.9-1 mulch biofilm barrier [65] pyrene 0.6 on phenanthrene crystals [63] 0.2 packed bed column reactor [62] 0.8 mulch biofilm barrier [65] Declor 103 5.6 Immobilized bacteria in alginate [66] 4-CB cogeners 10 Biofilm on glass beads [67] Kaneclor 300 [10][11][12][13][14][15][16][17][18][19][20] Immobilized bacteria in alginate [68] Aroclor 1260 1.8-10 Biofilm in fluidized bed reactor [69] IV. DESORPTION MODEL The remobilization of pollutants from biofilms can occur via detachment of the biofilm matrix from the substratum or via diffusional desorption of the pollutant molecules into the water column.…”

Applied Microbial Ecology and Bioremediation

“…Biodegradation under aerobic conditions was also investigated upon addition of oxygen, molecules increasing the PCB availability, or co-substrates such as biphenyl. For instance, Borja et al (2006) studied the biodegradation of highly chlorinated PCBs (Aroclor 1260) by a mixed culture isolated from a contaminated soil after biphenyl enrichment of the soil. The consortium was immobilized on cement particles in a three-phase fluidized-bed reactor running in a discontinuous mode where it was progressively adapted to PCB by alternated supplies of biphenyl and PCB.…”