Abstract
We studied biogas fermentation from alcohol waste fluid to evaluate the anaerobic digestion process and the production of vitamin B12 as a byproduct. Anaerobic digestion using acclimated methanogens was performed using the continuously stirred tank reactor (CSTR) and fixed-bed reactor packed with rock wool as carrier material at 55°C. We also studied the effects of metal ions added to the culture broth on methane and vitamin B12 formation. Vitamin B12 production was 2.92 mg/L in the broth of the fixed-bed reactor, twice that of the CSTR. The optimum concentrations of trace metal ions added to the culture liquid for methane and vitamin B12 production were 1.0 and 8 mL/L for the CSTR and fixed-bed reactor, respectively. Furthermore, an effective method for extracting and purifying vitamin B12 from digested fluid was developed.
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Zhang, Z., Quan, T., Li, P. et al. Study on methane fermentation and production of vitamin B12 from alcohol waste slurry. Appl Biochem Biotechnol 115, 1033–1039 (2004). https://doi.org/10.1385/ABAB:115:1-3:1033
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DOI: https://doi.org/10.1385/ABAB:115:1-3:1033