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An evaluation of anaerobic co digestion implementation on New York State dairy farms using an environmental and economic life cycle framework

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Academic year: 2020

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Fig. 1. The organic composition of dairy manure slurry and the 10 co-substrates (primary axis) based on total COD concentration (secondary axis).
Fig. 3. The specific methane yield (primary axis) and mass loading rate (secondary axes) at the manure:co-substrate mixture ratio  corre-sponding to maximum AD performance (blue bars) and maximum AD loading (orange bars).
Fig. 6. Total life-cycle environmental impacts (direct + indirect emissions) of co-digestion with each of the 10 co-substrates, modeled with Impact 2002 + for damage categories: climate change (A), ecosystem quality (B), human health (C), and resources (D)
Fig. 7. Overall life-cycle economic viability for each of the 10 co-digestion scenarios, both with (A) and without (B) gate-fee revenue, based on applied co-digestion mixture ratio

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