Method for supplementing denitrifying carbon source by utilizing excess sludge ethanol-type fermentation
A denitrification carbon source and excess sludge technology, applied in biological sludge treatment, pyrolysis treatment sludge, anaerobic digestion treatment, etc., can solve the problems of increased operating costs, toxic and side effects of denitrification system, and insufficient denitrification carbon source To avoid the accumulation of phosphorus in the system and improve the denitrification efficiency
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[0020] Combine figure 1 The specific embodiments of the present invention are as follows:
[0021] Use simple liquid carbon source as the substrate to cultivate ethanol-type fermentation bacteria, and add the cultured ethanol-type fermentation bacteria to the fermentation reactor (2) as inoculation sludge, and control various parameters (pH, alkalinity, temperature, Oxidation-reduction potential, etc.) control the fermentation reactor (2) in the ethanol-type fermentation stage. After the operation is stable, the residual sludge product after the pretreatment of the thermal hydrolysis reactor (1) gradually replaces the simple liquid phase substrate, which is effective for ethanol-type fermentation. The bacteria are domesticated, and the fermentation reactor (2) is controlled in the ethanol fermentation stage with sludge as the substrate. The remaining part of the fermentation product is discharged through the sludge discharge pipe (6), and the other part is returned to the hot wat...
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