Abstract:Background: Molasses is a wildly used feedstock for fermentation, but it poses a severe wastewater-disposal problem worldwide. Recently, the wastewater produced by yeast during molasses fermentation is being processed into fulvic acid (FA) powder as a fertilizer for crops, but it consequently induces a problem of soil acidification after being directly applied in soil. In this study, the low-cost FA powder was bioconverted into a value-added product, γ-PGA, by a glutamate independent producer, Bacillus velezen… Show more
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