Assessment of the resource associated with biomethane from food waste

Browne, James; Murphy, Jerry D.

doi:10.1016/j.apenergy.2012.11.017

Cited by 232 publications

(102 citation statements)

References 15 publications

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“…The composition of these cosubstrates was similar to waste sludge also quite stable. The BMPs of food waste were in the order of magnitude of other studies (Davidsson et al, 2007;Zhang et al, 2007;Browne and Murphy, 2013), whereas the BMP of slaughterhouse waste fat was rather low for a substrate that should be dominated by lipids (Davidsson et al, 2008;Zhu et al, 2011). The industrial alcohol BMP was very close to the theoretical value for ethanol which is 832 NLCH4 kgVS −1 .…”

Section: Comparison Of Measured and Calculated Methane Production Ofsupporting

confidence: 55%

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate’s Biomethane Potentials Compares Well with the One Measured On-Site

2017

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Biomethane potential (BMP) tests are used to determine the amount of methane that can be produced from organic materials in order to design different components of fullscale anaerobic digestion (AD) plants such as size of the digesters and units exploiting the produced biogas. However, little is known on how well BMPs compare with biogas production from the same organic materials in full-scale installations. In this study, two AD plants were chosen to carry out such comparisons, a dry AD plant treating green waste from urban areas and food waste from restaurants and supermarkets, and a liquid AD plant treating waste sludge from wastewater treatment and seven additional organic wastes. The BMPs of multiple samples of the individual organic materials collected during a period of 7-9 months were determined. Separate tests of mixtures of organic materials confirmed that the BMP of the mixtures can be calculated by adding the BMPs of the individual materials. The weekly methane production during the investigated periods was calculated from the full-scale installation data on the feeding of the digesters and the BMPs of each substrate fed into the digesters and compared with the weekly methane production measured on-site. The latter was calculated from the most accurately measured entity, either the electricity or the volume of purified biomethane injected into the grid. The weekly methane production rates calculated from BMPs and the one measured on-site were very similar and followed the same pattern. Some exceptions could be explained by, e.g., an overload of the full-scale installation. The measured weekly methane production accounted for 94.0 ± 6.8 and 89.3 ± 5.7% of the calculated weekly methane production for the wet and dry AD plant, respectively. For 26 out of 29 weeks, the calculated weekly methane production overestimated the measured one in the case of the wet AD plant and for 37 out of 39 weeks for the dry AD plant. Based on these results, it is proposed using an extrapolation coefficient of 0.8 to 0.9 to estimate the methane production of full-scale AD plants from BMPs of the substrates to be digested and their specific organic loads.

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Section: Comparison Of Measured and Calculated Methane Production Ofsupporting

confidence: 55%

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate’s Biomethane Potentials Compares Well with the One Measured On-Site

2017

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“…Methane has a Global Warming Potential (GWP) 23 times higher than that of carbon dioxide over a 100-year period (Lema and Omil, 2001) and therefore, significantly contributes to climate change (Browne and Murphy, 2013). About 50% of MSW is nowadays landfilled, whereas a content of 30% ca.…”

Section: Resultsmentioning

confidence: 99%

“…It is estimated that 820,000 t/year ca. of food waste (178 kg/person/year) are generated in Ireland, whereas the catering sector produces over 100,000 t/year of food waste (Browne and Murphy, 2013). …”

Section: Resultsmentioning

confidence: 99%

Assessment of Organic Waste Management Methods Through Energy Balance

Comparetti

Febo

Greco

et al. 2014

American Journal of Applied Sciences

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In Italy, the Organic Fraction of Municipal Solid Waste (OFMSW) is nowadays landfilled or processed through aerobic composting. The Italian towns currently support a high cost for OFMSW disposal and cause a high environmental impact, because of long distances travelled from towns to a few available landfills and fewer treatment places, as well as the used waste management methods. An interesting option for OFMSW is Anaerobic Digestion (AD), producing biogas and "digestate". In this survey a theoretical biogas plant was placed near a town of Sicily Region (Italy), centralised with reference to the area considered for producing OFMSW. The distances travelled every year to transport OFMSW from the nine towns considered to the nearest composting plant and the biogas one were calculated using QGIS software. Therefore, the energy balance was computed for each of the four considered scenarios. Within the implementation of Integrated Solid Waste Management (ISWM) method, AD resulted in an energy balance much higher than that of aerobic composting. In fact, differently from composting, AD can significantly contribute to energy recovery, while retaining the nutrients in the digestate produced and reducing Greenhouse Gas (GHG) emissions. The use of a rational network of towns for OFMSW collection and transportation results relevant, in terms of increased energy balance, only in the case of composting. Therefore, if AD would be implemented as OFMSW management method, by means of biogas plants, each of them placed in an area including some towns, e.g. that considered in this survey, it could highly reduce the cost and the environmental impact of waste disposal.

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“…There are two potential pathways for food waste collection: (i) commingled collection, i.e., with other municipal solid waste in what is called the residual waste stream; and (ii) source-separated collection. While the latter provides a quality feedstock for AD due to a reduction in contamination, commingled collection introduces high concentrations of potentially toxic elements (PTEs) and lowers the nutrient content of food waste, which may affect the performance of AD and the quality of the biogas and digestate produced [34,35].…”

Section: Introduction To the Case Studymentioning

confidence: 99%

“…Sustainability 2017, 9, 1497 6 of 17 feedstock for AD due to a reduction in contamination, commingled collection introduces high concentrations of potentially toxic elements (PTEs) and lowers the nutrient content of food waste, which may affect the performance of AD and the quality of the biogas and digestate produced [34,35]. As such, source-separated collection of food waste is considered to be the most suitable way to access a high quality (i.e., free from physical impurities) waste stream and ensure a stable operation of the AD process [36].…”

Section: Introduction To the Case Studymentioning

confidence: 99%

A Parameter Selection Framework for Sustainability Assessment

et al. 2017

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Sustainability assessment of resource recovery from waste is an important prerequisite for informed and sound decision-making. Life Cycle Sustainability Assessment (LCSA) has been developed to support this process, yet its use is still constrained by the difficulty of identifying the most relevant impact parameters. This paper, seeks to inform LCSA for resource recovery from waste based on a parameter identification approach that uses the political, economic, social, technological, environmental and legal (PESTEL) analysis. The novelty of this approach lies in the structured conceptualisation of the resource recovery system and the context within which decisions are made. The anaerobic digestion of source-separated food waste in the UK is used as a case study to trial and demonstrate the approach. Findings suggest that a conceptual, qualitative analysis, although limited in its scope due to the lack of quantitative components, is suitable in integrating different parameters, allowing for a holistic conceptualisation of the system and capturing important issues that could be easily overlooked. This type of analysis can summarise the key interdependencies, contrast the trade-offs and provide a wider understanding of the political and legal context within which the system operates, all important in extending the implementation of LCSA towards the right direction.

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Assessment of the resource associated with biomethane from food waste

Cited by 232 publications

References 15 publications

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate’s Biomethane Potentials Compares Well with the One Measured On-Site

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate’s Biomethane Potentials Compares Well with the One Measured On-Site

Assessment of Organic Waste Management Methods Through Energy Balance

A Parameter Selection Framework for Sustainability Assessment

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