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dc.contributor.authorRyan, Cecily A.
dc.contributor.authorBillington, Sarah L.
dc.contributor.authorCriddle, Craig S.
dc.identifier.citationRyan, Cecily A., Sarah L. Billington, and Craig S. Criddle. "Assessment of models for anaerobic biodegradation of a model bioplastic: Poly(hydroxybutyrate-co-hydroxyvalerate)." Bioresource Technology 227 (March 2017): 205-213. DOI: 10.1016/j.biortech.2016.11.119.en_US
dc.description.abstractKinetic models of anaerobic digestion (AD) are widely applied to soluble and particulate substrates, but have not been systematically evaluated for bioplastics. Here, five models are evaluated to determine their suitability for modeling of anaerobic biodegradation of the bioplastic poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV): (1) first-order kinetics with and without a lag phase, (2) two-step first-order, (3) Monod (4) Contois, and (5) Gompertz. Three models that couple biomass growth with substrate hydrolysis (Monod, Contois, and Gompertz) gave the best overall fits for the data , with reasonable estimates of ultimate CH4 production. The particle size limits of these models were then evaluated. Below a particle size of 0.8 mm, rates of hydrolysis and acetogenesis exceeded rates of methanogenesis with accumulation of intermediates leading to a temporary inhibition of CH4 production. Based on model fit and simplicity, the Gompertz model is recommended for applications in which particle size is greater than 0.8 mm.en_US
dc.description.sponsorshipCalRecycle Contract No. DRRR10020; California EPA Department of Toxic Substances Control Grant No. 07T3451; NSF CMMI Grant 0900325;Chevron; EPA Star Graduate Fellowship; Stanford Civil Engineering Charles H. Leavell Graduate Fellowshipen_US
dc.titleAssessment of models for anaerobic biodegradation of a model bioplastic: Poly(hydroxybutyrate-co-hydroxyvalerate)en_US
mus.citation.journaltitleBioresource Technologyen_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentMechanical & Industrial Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.contributor.orcidRyan, Cecily A.|0000-0001-8335-2287en_US

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