Economic and environmental assessments of Bio-CNG production via anaerobic digestion (AD) technologies.

摘要

1. Analyzed field to pump LCA and TEA of Bio-CNG production from dairy manure, food waste and Miscanthus feedstocks through LS-AD, SS-AD and /-AD. 2. Major GHG emission and energy use activities: Logistics of liquid stream and field application of digestate. 3. Bio-CNG produced from dairy manure have least potential to mitigate GHG emission. However, it used least energy and most economical among three pathways. 4. Miscanthus production and logistics contributed 50% of total energy use in the Bio-CNG supply chain. 5. Bio-CNG production commercially viable at current market price ($2/GGE) considering tipping fee of food waste ($35/Mg), carbon credit ($10/MgC02e) and RIN ($ 0.645/RIN).