Biochemical methane potential tests of different autoclaved and microwaved lignocellulosic organic fractions of municipal solid waste

Anaerobic digestion (AD) is a suitable management option for the energy valorization of many wastes, including the organic fraction of municipal solid waste (OFMSW). However, in some cases, long storage after the separate collection of this waste is required for management reasons, especially when the amount of waste to be treated temporarily exceeds the capacity of available AD plants. This study evaluates the biochemical methane potential (BMP) of the OFMSW after preliminary storage of 2, 6, and 10 days, in order to assess whether they are still suitable for AD or not. Moreover, the accuracy of three kinetic models (first order, Gompertz, and logistic models) in estimating the methane yield of stored OFMSW is tested. The resulting methane yield was between about 500 and 650 NmL·gVS−1 and slightly increased with the increase of the storage time after collection. Overall, this study has demonstrated that storage of OFMSW, when the collected amount of solid waste exceeds the treatment capacity of AD plants, a storage time up to 10 days does not impact the methane yield of the process.

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Towards developing a representative biochemical methane potential (BMP) assay for landfilled municipal solid waste – A review

Bioresource Technology ◽

10.1016/j.biortech.2018.01.069 ◽

2018 ◽

Vol 254 ◽

pp. 312-324 ◽

Cited By ~ 28

Author(s):

Lauretta Feyisetan Pearse ◽

Joseph Patrick Hettiaratchi ◽

Sunil Kumar

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Biochemical Methane Potential ◽

Methane Potential

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Anaerobic codigestion of the mechanically sorted organic fraction of a municipal solid waste with cattle manure in packed microcosms under batch conditions

Water Science & Technology ◽

10.2166/wst.2008.520 ◽

2008 ◽

Vol 58 (9) ◽

pp. 1735-1742 ◽

Cited By ~ 4

Author(s):

L. Bertin ◽

D. Todaro ◽

C. Bettini ◽

F. Fava

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Suspended Solids ◽

Cattle Manure ◽

Lag Phase ◽

Organic Fraction ◽

Biochemical Methane Potential ◽

Ch4 Production ◽

Anaerobic Codigestion ◽

Methane Potential

Packed microcosms, consisting of 0.6 L-flask filled with tire chips (TC, a non-cost-recyclable non-biodegradable material) or ceramic cubes, were employed in the wet batch mesophilic anaerobic codigestion of a mechanically sorted organic fraction of a municipal solid waste with cattle manure. Two different waste mixtures were digested within four successive batch experiments, performed by collecting the digested waste and by refilling each microcosm with the same experimental mixture. Methane production yields related to the first experiment were comparable to those of non-packed identically developed microcosms, while they significantly grew during all the following experiences. No CH4-production lag-phase was observed since the second batch experiment. Similar results were obtained for both packing materials: however, the highest methane yields were achieved within bioreactors packed with TC in the presence of a mixture in which the volatile suspended solids (VSS) provided by the municipal waste represented the 55% of the total ones. Under such condition, a methane yield corresponding to the biochemical methane potential (BMP) calculated through a 6-month experiment with non-packed microcosms (176 ml/gVS) was attained in about 1/4 of the time. Importantly, the BMP can significantly grow up as a consequence of the approach described in this study.

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