Anaerobic co-digestion of organic fractions of municipal solid waste: Synergy study of methane production and microbial community

Abstract The silage of the organic fraction of municipal solid waste (OFMSW) is a common practice in biogas plants. During silage, fermentation processes take place, affecting the later methanisation stage. There are no studies about how OFMSW silage affects methane production. This work aimed to determine the effects of silage (anaerobic acid fermentation) at different solids concentrations and temperatures on methane production. OFMSW was ensiled at 20, 35, and 55 °C with total solids (TS) concentrations of 10, 20, and 28% for 15 days. The ensiled OFMSW was then tested for methane production at the substrate to inoculum ratios (S/I) of 0.5, 1.0, and 1.5. Independently of the temperature, the production of the metabolites during silage increases with decreasing solids concentration. The highest metabolites production were lactic acid, ethanol, and acetic acid, representing together 95% of the total. Methane production from ensiled OFMSW at 10% solids concentration shows, under every tested condition, better methane production than from fresh OFMSW. Ensiled OFMSW produces more methane than fresh OFMSW, and methane production was highest at 35 °C.

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

Waste Management ◽

10.1016/j.wasman.2016.07.006 ◽

2016 ◽

Vol 56 ◽

pp. 143-150 ◽

Cited By ~ 38

Author(s):

Isabella Pecorini ◽

Francesco Baldi ◽

Ennio Antonio Carnevale ◽

Andrea Corti

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Biochemical Methane Potential ◽

Methane Potential ◽

Organic Fractions

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Kinetic Modelling of Biogas Production from Organic Fractions of Municipal Solid Waste and Projection of Energy and Energy Potentials

Biomethane through Resource Circularity ◽

10.1201/9781003204435-3 ◽

2021 ◽

pp. 19-31

Author(s):

V. Mozhiarasi ◽

P. M. Benish Rose ◽

S. M. Elavaar Kuzhali ◽

S. Kanyapushpanjali ◽

D. Weichgrebe ◽

...

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Biogas Production ◽

Kinetic Modelling ◽

Organic Fractions

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The impacts of metal ions on phytotoxicity mediate by microbial community during municipal solid waste composting

Journal of Environmental Management ◽

10.1016/j.jenvman.2019.04.063 ◽

2019 ◽

Vol 242 ◽

pp. 153-161 ◽

Cited By ~ 6

Author(s):

Xinyu Zhao ◽

Beidou Xi ◽

Xiaosong He ◽

Dan Li ◽

Wenbing Tan ◽

...

Keyword(s):

Microbial Community ◽

Municipal Solid Waste ◽

Metal Ions ◽

Solid Waste

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High-solids anaerobic digestion: comparison of three pilot scales

Water Science & Technology ◽

10.2166/wst.2008.521 ◽

2008 ◽

Vol 58 (9) ◽

pp. 1757-1763 ◽

Cited By ~ 60

Author(s):

J. Guendouz ◽

P. Buffière ◽

J. Cacho ◽

M. Carrère ◽

J.-P. Delgenes

Keyword(s):

Anaerobic Digestion ◽

Municipal Solid Waste ◽

Solid Waste ◽

Methane Production ◽

Operating Conditions ◽

High Solids ◽

Dry Digestion ◽

Mesophilic Conditions ◽

Production Efficiencies

Two experiments were undertaken in three different experimental set-ups in order to compare them: an industrial 21-m3 pilot reactor, a new 40-ℓ laboratory pilot reactor and bmp type plasma bottles. Three consecutive batch dry digestion tests of municipal solid waste were performed under mesophilic conditions with the same feedstock in all vessels. Biogas and methane production at the end of the tests were similar (around 200 m3 CH4STP/tVS) for both pilot reactors and were different from the bottle tests. The dynamics of methane production and VFA accumulation concurred. However, the maximal levels of VFA transitory accumulation varied between reactors and between runs in a same reactor. Ammonia levels were similar in both reactors. These results show that the new reactor accurately imitates the conditions found in the larger one. Adaptation of microorganisms to the waste and operating conditions was also pointed out along the consecutive batches. Thermophilic semi-continuous tests were performed in both reactors with similar conditions. The methane production efficiencies were similar.

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