Environmental assessment of waste feedstock mono-dimensional and bio-refinery systems: Combining manure co-digestion and municipal waste anaerobic digestion

JOURNAL OF CLEANER PRODUCTION

卷:171

Article

Moretti, M.^1,2  Van Dael, M.^1,3  Malina, R.¹  Van Passel, S.^1,4 

[1] UHasselt, Fac Business Econ, Ctr Environm Sci, Agoralaan, B-3590 Diepenbeek, Belgium

[2] Univ Liege, Gembloux Agrobio Tech Econ & Rural Dev Unit, Passage Deportes 2, B-5030 Gembloux, Belgium

[3] VITO, Unit Separat & Convers Technol, Boeretang 200, B-2400 Mol, Belgium

[4] Antwerp Univ, Fac Appl Econ, Dept Engn Management, Prinsstr 13, B-2000 Antwerp, Belgium

关键词: Biomass;    Life-cycle assessment;    Anaerobic digestion;    Bioenergy;    CHP;   

DOI  :  10.1016/j.jclepro.2017.10.097

来源: Elsevier

【 摘 要 】

Organic municipal solid waste (OMSW) as a feedstock for energy recovery and material recycling offers the potential to reduce environmental impacts from energy production while displacing emission intensive waste management strategies such as landfills. This paper quantifies the environmental impact of anaerobic digestion of local, residual biomass. A life-cycle assessment was jointly performed for two scenarios for the biological treatment of local organic municipal solid waste and pig manure in the Netherlands. Scenario 1 was a separate treatment using anaerobic digestion, and Scenario 2 was a bio-refinery system that integrates anaerobic digestion of organic, municipal solid waste, and co digestion of pig manure and other organic co-substrates \. For both scenarios, electricity and heat are generated using a combined heat and power engine. The bio-refinery system (Scenario 2) contribution to climate change resulted in 0.16 Mt CO2 eq./yr, which is lower than the 0.17 Mt CO2 eq./yr of Scenario 1. Both scenarios are found to be beneficial with regard to resource depletion and human toxicity. The integration of organic waste and manure anaerobic digestion has no effect on acidification and terrestrial eutrophication impact categories, resulting in 43.59 AE eq. and 86.33 AE eq. for Scenario 1 and 43.58 AE eq. and 86.30 AE eq. for Scenario 2. Moreover, Scenario 2 yields 18% lower emissions than those from natural gas derived electricity in the Netherlands. The biorefinery system represents an opportunity to improve organic waste-management strategies, at the same time as reducing the environmental impact from energy production and the costs for surplus manure disposal by producing high-quality commodities that can be traded on the market. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free