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Biodegradation of p-chlorophenol by a microalgae consortium

2003; Elsevier BV; Volume: 38; Issue: 1 Linguagem: Inglês

10.1016/j.watres.2003.09.005

1879-2448

Sofia A. Costa Lima, Maria Filomena de Jesus Raposo, Paula M. L. Castro, Rui Morais,

Microbial bioremediation and biosurfactants

An aquatic community was recovered from a waste discharge container fed with several aromatic pollutants. After 3 months of selective enrichment with p-chlorophenol and p-nitrophenol, two microalgae species, Chlorella vulgaris and Coenochloris pyrenoidosa, were recovered from the microbial consortium. As an axenic culture, this microalgae consortium was able to remove p-chlorophenol under different photo-regimes. Cultures grown under a 24 h light regime were capable of biodegrading 50 mg l−1 of p-chlorophenol within 5 days. Addition of zeolite, an adsorbing material, did not improve the p-chlorophenol removal. However, when p-chlorophenol at 150 mg l−1 was fed to the culture supplemented with zeolite, the growth rate of the consortium improved, but the lag phase was longer (16 against 14 days in the absence of zeolite).