Diversity and Abundance of Microbial Communities in UASB Reactors during Methane Production from Hydrolyzed Wheat Straw and Lucerne.

However, in line with the observed negative correlation with organic acids in the present study, a decreasing trend in these two phyla was also seen in response to increased OLR and organic acid level in a previous study on UASB processes, where the effect was independent of pH changes [ 36 ].

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In general, the overall microbial community over time showed a trend for a decrease in both richness and diversity.

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