Bioadsorción de cobre utilizando lodo anaerobio acidogénico

In this paper a study of biosorption of copper was carried out using living and nonliving acidogenic anaerobic sludge. Characterization results of sludge are as follows: TS 60.57 g/L, VSS 30.95, SVI 43 mL_sludge/gVSS, particle size from 0.25 to 0.6 mm, μ_max of 0.375 gCOD-CH₄/gVSS^.d, and Ks_acetate of 27.11 mM. Bioadsorption trails using copper concentration from 50 to 300 mgCu(II)/L show that copper removal is more evidently during the frst 15 minutes. Bioadsorption capacity of copper in living and non-living sludge has the same behavior and there is a well ftting with Langmuir model in both systems, where q_max is 25.4 and 27.67 mgCu(II)/gVSS, and b corresponds to 0.00739 y 0.00699, respectively. In addition, living and non-living sludge can be used to remove copper using acidogenic anaerobic reactors. SEM, EDS and XRD results for sludge reveal the presence of bacteria, diatoms (amorphous silica) and silica (cris-tobalite) matrix. Qualitative and quantitative analysis by EDS showed the presence of copper bioaccumulated into diatoms and on the bioflms.