The single and combined effects of cometabolism and bioaugmentation with Pseudomonas putida on the aerobic degradation of 4-chlorophenol (4-CP) in sequencing batch reactors was studied. Phenol was added as growth substrate to enhance 4-CP biodegradation

through cometabolic transformation. RESULTS: Adaptation of activated sludge by increasing 4-CP loads aimed at a progressive check details acclimation to that compound, which could be successfully degraded at loading rates below 55 mg g-1 VSS d-1. Using phenol as cosusbtrate allowed almost a threefold decrease of the time required for the exhaustion of 4-CP. The addition of phenol also reduced the toxic effect of 4-CP over P. putida. The bioaugmentation of the SBR with P. putida enhanced Quisinostat Epigenetics inhibitor the 4-CP removal rate, allowing the SBR to deal with 4-CP loads up to 120 mg g-1 VSS d-1. CONCLUSION: Bioaugmentation of SBR with P. putida improves the capacity of this system to withstand high toxic shocks. Cometabolic degradation of 4-CP with phenol improves the removal rates achieved by the SBR at similar 4-CP loads. Both strategies are more convenient intensification techniques than acclimation for the biological treatment of 4-CP. Copyright (c) 2012 Society

of Chemical Industry”
“BACKGROUND: Textile dyes are hardly removed from effluents by conventional wastewater treatment but can be degraded by a number of physicochemical processes, which nevertheless have specific limitations. The development of bioremediation processes may provide a viable alternative. RESULTS: Resting cells of three aquatic fungal strains, Alternaria sp. (Tt-S1), Coniothyrium sp. (Kl-S5) and Phoma sp. (DSM22425), were evaluated for their ability to decolorize model

effluents of different dye application classes. Phoma sp., which decolorized all four applied model wastewaters (MWW), was immobilized on a polyester-based fleece material originally designed for use as cooker-hood filters, and applied in internal loop airlift and www.sellecn.cn/products/bms-345541.html bubble column reactors in repeated batch mode under sterile and non-sterile conditions. Depending on the applied MWW and bioreactor setup, a decolorization of more than 90% was achieved in three consecutive treatment cycles and total operating time of 16 days. In an upscaled reactor (10 L), Phoma sp. decolorized MWW containing acid dyes by 61%. Chemical oxygen demand of the MWW was reduced by 36%. CONCLUSION: The results presented underline the potential of aquatic fungi for the development of textile dyeing effluent treatment processes. Copyright (c) 2012 Society of Chemical Industry”
“BACKGROUND: Wastes generated in production of caprolactam (2-oxohexamethylenimine, e-caprolactam) and caprolactam-based polymers contain the unreacted monomer and its low-molecular linear and cyclic oligomers. Application of microorganisms for biological treatment of caprolactam- and oligomer-containing wastes can become an alternative to existing waste utilization methods.