TY - JOUR
T1 - Biodegradability and methane production from secondary paper and pulp sludge
T2 - Effect of fly ash and modeling
AU - Huiliñir, César
AU - Montalvo, Silvio
AU - Guerrero, Lorna
N1 - Publisher Copyright:
© IWA Publishing 2015.
PY - 2015
Y1 - 2015
N2 - The effect of fly ash on biodegradability and methane production from secondary paper and pulp sludge, including its modeling, was evaluated. Three tests with fly ash concentrations of 0, 10 and 20 mg/L were evaluated at 32°C. Methane production was modeled using the modified Gompertz equation. The results show that the doses used produce a statistically significant increase of accumulated methane, giving values greater than 225 mL of CH4 per gram of volatile solids (VS) added, and 135% greater than that obtained in the control assay. Biodegradability of VS increased 143% with respect to the control assays, giving values around 43%. The modified Gompertz model can describe well methane generation from residual sludge of the paper industry water treatment, with parameter values between those reported in the literature. Thus, the addition of fly ash to the process causes a significant increase of accumulated methane and VS removal, improving the biodegradability of paper and pulp sludge.
AB - The effect of fly ash on biodegradability and methane production from secondary paper and pulp sludge, including its modeling, was evaluated. Three tests with fly ash concentrations of 0, 10 and 20 mg/L were evaluated at 32°C. Methane production was modeled using the modified Gompertz equation. The results show that the doses used produce a statistically significant increase of accumulated methane, giving values greater than 225 mL of CH4 per gram of volatile solids (VS) added, and 135% greater than that obtained in the control assay. Biodegradability of VS increased 143% with respect to the control assays, giving values around 43%. The modified Gompertz model can describe well methane generation from residual sludge of the paper industry water treatment, with parameter values between those reported in the literature. Thus, the addition of fly ash to the process causes a significant increase of accumulated methane and VS removal, improving the biodegradability of paper and pulp sludge.
KW - Biodegradability
KW - Fly ash
KW - Methane production
KW - Modeling
KW - Modified Gompertz model
KW - Paper and pulp sludge
UR - http://www.scopus.com/inward/record.url?scp=84937112636&partnerID=8YFLogxK
U2 - 10.2166/wst.2015.210
DO - 10.2166/wst.2015.210
M3 - Article
C2 - 26177405
AN - SCOPUS:84937112636
SN - 0273-1223
VL - 72
SP - 230
EP - 237
JO - Water Science and Technology
JF - Water Science and Technology
IS - 2
ER -