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Predicting the effects of integrating mineral wastes in anaerobic digestion of OFMSW using first-order and Gompertz models from biomethane potential assays

Lookup NU author(s): Dr Burhan ShamuradORCiD, Emeritus Professor Neil GrayORCiD, Dr Evangelos Petropoulos, Shamas Tabraiz, Edward MEMBERE, Dr Paul Sallis



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier, 2020.

For re-use rights please refer to the publisher's terms and conditions.


Previous studies found mineral wastes (MW; incineration bottom ash (IBA), cement based waste (CBW), Fly ash (FA) and boiler ash (BA) are a promising resource for the macro-/micronutrients necessary for anaerobic digestion (AD) processes. The current study used first-order and modified Gompertz models from BMP assays to investigate the effects of integrating MW on the AD of OFMSW at 37 °C. Results from the first-order model showed a 45% increase in the specific growth rate of microorganisms (μ) in the MW- supplemented BMP compared to the control. Gompertz model results indicated that the IBA, CBW, FA and BA BMP amended assays obtained the highest K values (45–54 mL CH4 g VS−1 d−1) than the control (K ∼ 31 mL CH4 g VS−1 d−1), with no significant adverse effects of co-digestion of OFMSW with MW on the length of the lag phase (λ) in BMP assays (λ = 1.89 ± 0.07 days for IBA, CBW and BA amended assays compared to 1.5 ± 0.01 days for the control). However, FA amended assays had a greater λ value (3.66 ± 0.1 days). The MW provided both alkalinity and released several trace elements at concentrations within the optimal ranges for methanogenic archaea.

Publication metadata

Author(s): Shamurad B, Gray N, Petropoulos E, Tabraiz S, Membere E, Sallis P

Publication type: Article

Publication status: Published

Journal: Renewable Energy

Year: 2020

Volume: 152

Pages: 308-319

Print publication date: 01/06/2020

Online publication date: 20/01/2020

Acceptance date: 15/01/2020

Date deposited: 21/01/2020

ISSN (print): 0960-1481

ISSN (electronic): 1879-0682

Publisher: Elsevier


DOI: 10.1016/j.renene.2020.01.067


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