Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Aalborg, Denmark.
Bioresour Technol. 2011 Feb;102(3):2213-8. doi: 10.1016/j.biortech.2010.09.118. Epub 2010 Oct 8.
This study investigated methane yield via anaerobic digestion of multi-component substrates based on mixtures of biodegradable single-component substrates with cow dung as main component. Bench and full-scale digestion experiments were carried out for both single and multi-component substrates to identify the relationship between methane yield and substrate composition. Results from both bench- and full-scale experiments corresponded well and showed that using multi-component substrates increases the methane yield much more than what would be expected from digestion of single substrates. Process stability as indicated by gas production, pH and NH(4)(+) concentration variations were also improved by using multi-component substrates compared to digestion of single-component substrates. The results, thus, suggest that assessment of methane yield for multi-component substrates cannot reliably be based on methane yields for corresponding single-component substrates but should instead be measured directly.
本研究基于以牛粪为主要成分的可生物降解单一组分底物混合物，调查了多组分底物通过厌氧消化产生甲烷的情况。对单一组分和多组分底物均进行了中试和规模化消化实验，以确定甲烷产量与底物组成之间的关系。中试和规模化实验的结果非常吻合，表明使用多组分底物比消化单一组分底物产生的甲烷产量要高得多。与消化单一组分底物相比，使用多组分底物还可以改善产气量、pH 值和 NH4+浓度变化等过程稳定性。因此，这些结果表明，多组分底物的甲烷产量评估不能可靠地基于相应的单一组分底物的甲烷产量，而应直接进行测量。
