Experimental study on carbon source of fermentation solution prepared from waste straw
Currently,most urban sewage suffers from insufficient internal carbon sources,and additional carbon source needs to be added to meet the metabolic needs of microorgan-isms.Compared to traditional carbon sources,the new biomass carbon source has high envi-ronmental safety,remarkable denitrification effect.Biomass corn straw was used as raw mate-rial to prepare biomass straw fermentation liquid by anaerobic fermentation technology.The effects of different solid-liquid ratio and fermentation temperature on the chemical oxygen demand(COD)content of carbon source were investigated,and the optimal fermentation pro-cess conditions were obtained.High performance liquid chromatography(HPLC),spectropho-tometry and 16S high-throughput sequencing were used to explain the acid production mechanism of biomass fermentation solution.The denitrification experiment was carried out under the optimal C/N,and all the effluent indexes met the grade A standard of urban sewage discharge,indicating that the prepared biomass carbon source had good denitrifica-tion performance.
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