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Title: Pyrolysis and gasification of meat-and-bone-meal: Energy balance and GHG accounting

Highlights: • GHG savings are in the order of 600–1000 kg CO{sub 2}-eq. per Mg of MBM treated. • Energy recovery differed in terms of energy products and efficiencies. • The results were largely determined by use of the products for energy purposes. - Abstract: Meat-and-bone-meal (MBM) produced from animal waste has become an increasingly important residual fraction needing management. As biodegradable waste is routed away from landfills, thermo-chemical treatments of MBM are considered promising solution for the future. Pyrolysis and gasification of MBM were assessed based on data from three experimental lab and pilot-scale plants. Energy balances were established for the three technologies, providing different outcomes for energy recovery: bio-oil was the main product for the pyrolysis system, while syngas and a solid fraction of biochar were the main products in the gasification system. These products can be used – eventually after upgrading – for energy production, thereby offsetting energy production elsewhere in the system. Greenhouse gases (GHG) accounting of the technologies showed that all three options provided overall GHG savings in the order of 600–1000 kg CO{sub 2}-eq. per Mg of MBM treated, mainly as a consequence of avoided fossil fuel consumption in the energy sector. Local conditionsmore » influencing the environmental performance of the three systems were identified, together with critical factors to be considered during decision-making regarding MBM management.« less
Authors:
 [1] ;  [2] ;  [2]
  1. Thermochemical Processes Group, Aragón Institute for Engineering Research (I3A), Universidad de Zaragoza (Spain)
  2. Department of Environmental Engineering. Technical University of Denmark, Kongens Lyngby (Denmark)
Publication Date:
OSTI Identifier:
22300326
Resource Type:
Journal Article
Resource Relation:
Journal Name: Waste Management; Journal Volume: 33; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; BIODEGRADATION; BIOLOGICAL WASTES; CARBON DIOXIDE; DECISION MAKING; ENERGY BALANCE; ENERGY RECOVERY; GASIFICATION; GREENHOUSE GASES; PILOT PLANTS; PYROLYSIS; SANITARY LANDFILLS