Waste and Biomass Valorization

, Volume 10, Issue 5, pp 1091–1099 | Cite as

Assessment of Chemical Inhibitor Addition to Improve the Gas Production from Biowaste

  • S. ZahediEmail author
  • S. O. Dahunsi
  • M. Perez
  • R. Solera
Original Paper


The coexistence of sulphate-reducing bacteria and methanogenic archaea in the reactors during the anaerobic digestion from sulphate-containing waste could favor the accumulation of sulfide on the biogas, and therefore reduce its quality. In this study, the effect of sulphate-reducing bacteria inhibitor (\({\text{MoO}}_{4}^{{ - 2}}\)) addition in a two phase system from sulphate-containing municipal solid waste to improve the quality of the biogas has been investigated. The results showed that although SRB and sulphide production decreased, the use of inhibitor was not effective to improve the anaerobic digestion in a two phase system from sulphate-containing waste, since a significant decrease on biogas and organic matter removal were observed. Before \({\text{MoO}}_{4}^{{ - 2}}\) addition the average values of volatile solid were around 12 g/kg, after 5 days of inhibitor use, those values did exceed to 28 g/kg. Molybdate caused acidification in the reactor and it was according to decrease in the pH values. In relation to microbial consortia, the effect of inhibitor was a decrease in Bacteria (44%; 60% in sulphate-reducing bacteria) and Archaea (38%) populations.


Biomethanization Inhibition Sulphate-containing solid waste Microbial community structure 



Zahedi thanks MIFAS association for people with physical disabilities, especially R. Ferrer and J. Amores (Olot, Girona, Spain). The authors wish to express their gratitude to Spanish Ministry of Economy and Competitiveness, specifically to the Project CTM 2015-64810R financed by the European Regional Development Fund (ERDF) entitled “Hydrogen-Methane Production from Biosolids and Vinasses Anaerobic Co-Digestion”.


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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Environmental TechnologiesCadiz UniversityCadizSpain
  2. 2.Biomass and Bioenergy Group, Environment and Technology Research ClusterLandmark UniversityOmu-AranNigeria
  3. 3.Biological Sciences DepartmentLandmark UniversityOmu-AranNigeria

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