The effect of natural zeolite on methane production from secondary paper and pulp sludge and its modeling
are evaluated. Five tests with zeolite concentrations of 0, 0.2, 0.5, 1 and 20 g/L were evaluated at
30 C. The modified Gompertz equation, the logistic function and the transfer function were evaluated.
The results show that doses between 0.2 and 1 g/L of zeolite produce a statistically significant increase
of accumulated methane, giving values greater than 183 mL for CH4/g of VSadded. On the contrary, the
20 g/L dose of zeolite reduced the methane production. The modified Gompertz and the logistic function
models concur with the experimental data, the former having the best fit.
The effect of natural zeolite on methane production from secondary paper and pulp sludge and its modelingare evaluated. Five tests with zeolite concentrations of 0, 0.2, 0.5, 1 and 20 g/L were evaluated at30 C. The modified Gompertz equation, the logistic function and the transfer function were evaluated.The results show that doses between 0.2 and 1 g/L of zeolite produce a statistically significant increaseof accumulated methane, giving values greater than 183 mL for CH4/g of VSadded. On the contrary, the20 g/L dose of zeolite reduced the methane production. The modified Gompertz and the logistic functionmodels concur with the experimental data, the former having the best fit.
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