作者: Giuseppe Forlani , Valentina Prearo , Dorota Wieczorek , Paweł Kafarski , Jacek Lipok
DOI: 10.1016/J.ENZMICTEC.2010.12.005
关键词: Sewage treatment 、 Biochemistry 、 Bacteria 、 Biology 、 Bioremediation 、 Methylphosphonic acid 、 Wastewater 、 Environmental chemistry 、 Biodegradation 、 Xenobiotic 、 Biofilter
摘要: Abstract The ability of Spirulina spp. to metabolize the recalcitrant xenobiotic Dequest 2054 ® [hexamethylenediamine-N,N,N′,N′-tetrakis(methylphosphonic acid)], a CaSO 4 inhibitor used for boiler treatment and reverse osmosis desalination, was investigated. compound served as sole source phosphorus, but not nitrogen, cyanobacterial growth. In vivo utilization followed by 31 P NMR analysis. disappearance polyphosphonate proceeded only with actively dividing cells, no release inorganic phosphate evident. However, difference found between P-starved P-fed cultures. Maximal reached 1.0 ± 0.2 mmol l −1 , corresponding 0.56 ± 0.11 mmol g dry biomass, thus residual amounts were still present in exhausted medium when supplied at higher initial concentrations. At low substrate levels metabolism rates lower, suggesting that concentration-driven uptake may represent limiting step during biodegradation process. retained biocolumns made immobilized either alive or dead. A lab-scale pilot plant, consisting series sequentially connected vessels containing an proliferating algal culture, built tested wastewater treatment. Results showed 50% removal added concentration 2.5 mM. Although further optimization will be required, data strengthen possibility using strains bioremediation purposes.