Progress in Hydrolysis of Excess Activated Sludge by Additional Enzymes
نویسندگان
چکیده
Additional enzymes pretreatment technology can promote the hydrolysis of excess activated sludge, while increasing gas production. Single enzyme pretreatment of sludge, alkaline protease has a better effect of hydrolysis. The optimum working conditions for alkaline protease: pH value of 8.0, the solid-liquid ratio of 1:4, the enzyme concentration of 2%, the working temperature of 55°C, reaction time 4h. Cellulase and pronase E joint is the best effect in the treatment of compound enzymes pretreatment, sludge SS reduced by 80%, granular COD reduction of 93%, and TCOD reduced 97%, TSS from 25g / L down 5g/L. The maximum SCOD, polysaccharides and NH4 -N concentrations reached 16878mg/L, 2695.3mg/L and 156.73mg/L when protease concentrations is 20mg/gTS, EDTA-2Na dosage is 0.20g/gTS and temperature is 55°C in joint enzymes
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