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Simulation of substrate degradation in composting of sewage sludge.
Waste Manag. 2010 Oct; 30(10):1931-8.WM

Abstract

To simulate the substrate degradation kinetics of the composting process, this paper develops a mathematical model with a first-order reaction assumption and heat/mass balance equations. A pilot-scale composting test with a mixture of sewage sludge and wheat straw was conducted in an insulated reactor. The BVS (biodegradable volatile solids) degradation process, matrix mass, MC (moisture content), DM (dry matter) and VS (volatile solid) were simulated numerically by the model and experimental data. The numerical simulation offered a method for simulating k (the first-order rate constant) and estimating k(20) (the first-order rate constant at 20 degrees C). After comparison with experimental values, the relative error of the simulation value of the mass of the compost at maturity was 0.22%, MC 2.9%, DM 4.9% and VS 5.2%, which mean that the simulation is a good fit. The k of sewage sludge was simulated, and k(20), k(20s) (first-order rate coefficient of slow fraction of BVS at 20 degrees C) of the sewage sludge were estimated as 0.082 and 0.015 d(-1), respectively.

Authors+Show Affiliations

Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Beijing 100101, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20478699

Citation

Zhang, Jun, et al. "Simulation of Substrate Degradation in Composting of Sewage Sludge." Waste Management (New York, N.Y.), vol. 30, no. 10, 2010, pp. 1931-8.
Zhang J, Gao D, Chen TB, et al. Simulation of substrate degradation in composting of sewage sludge. Waste Manag. 2010;30(10):1931-8.
Zhang, J., Gao, D., Chen, T. B., Zheng, G. D., Chen, J., Ma, C., Guo, S. L., & Du, W. (2010). Simulation of substrate degradation in composting of sewage sludge. Waste Management (New York, N.Y.), 30(10), 1931-8. https://doi.org/10.1016/j.wasman.2010.04.004
Zhang J, et al. Simulation of Substrate Degradation in Composting of Sewage Sludge. Waste Manag. 2010;30(10):1931-8. PubMed PMID: 20478699.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simulation of substrate degradation in composting of sewage sludge. AU - Zhang,Jun, AU - Gao,Ding, AU - Chen,Tong-Bin, AU - Zheng,Guo-Di, AU - Chen,Jun, AU - Ma,Chuang, AU - Guo,Song-Lin, AU - Du,Wei, Y1 - 2010/05/15/ PY - 2010/01/25/received PY - 2010/03/19/revised PY - 2010/04/06/accepted PY - 2010/5/19/entrez PY - 2010/5/19/pubmed PY - 2011/1/19/medline SP - 1931 EP - 8 JF - Waste management (New York, N.Y.) JO - Waste Manag VL - 30 IS - 10 N2 - To simulate the substrate degradation kinetics of the composting process, this paper develops a mathematical model with a first-order reaction assumption and heat/mass balance equations. A pilot-scale composting test with a mixture of sewage sludge and wheat straw was conducted in an insulated reactor. The BVS (biodegradable volatile solids) degradation process, matrix mass, MC (moisture content), DM (dry matter) and VS (volatile solid) were simulated numerically by the model and experimental data. The numerical simulation offered a method for simulating k (the first-order rate constant) and estimating k(20) (the first-order rate constant at 20 degrees C). After comparison with experimental values, the relative error of the simulation value of the mass of the compost at maturity was 0.22%, MC 2.9%, DM 4.9% and VS 5.2%, which mean that the simulation is a good fit. The k of sewage sludge was simulated, and k(20), k(20s) (first-order rate coefficient of slow fraction of BVS at 20 degrees C) of the sewage sludge were estimated as 0.082 and 0.015 d(-1), respectively. SN - 1879-2456 UR - https://www.unboundmedicine.com/medline/citation/20478699/Simulation_of_substrate_degradation_in_composting_of_sewage_sludge_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0956-053X(10)00212-6 DB - PRIME DP - Unbound Medicine ER -