Abstract
Bioconversion of polymeric substrates in anaerobic digesters is slow. Exploratory research was conducted on the effects of the addition of soluble oxidants to a thermophilic, anaerobic, semicontinuous stirred tank reactor (CSTR) fed a biomass feedstock. After adaptation, added nitrate was quantitatively reduced to ammonia and isotopelabeling experiments confirmed that denitrification reactions did not occur. Addition of sulfate to a continuous nitrate amended digester resulted in sulfate accumulation, whereas sulfate addition to nonnitrate-amended digesters resulted in sulfate reduction. These results support the hypothesis that nitrate is preferentially reduced in the presence of sulfate and nitrate.
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Rivard, C.J., Bordeaux, F., Henson, J.M. et al. Effects of addition of soluble oxidants on the thermophilic anaerobic digestion of biomass to methane. Appl Biochem Biotechnol 17, 245–262 (1988). https://doi.org/10.1007/BF02779161
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DOI: https://doi.org/10.1007/BF02779161