Life cycle assessment of flexibly fed biogas processes for an improved demand-oriented biogas supply.

Abstract:

:This paper analyses concepts to facilitate a demand oriented biogas supply at an agricultural biogas plant of a capacity of 500kWhel, operated with the co-digestion of maize, grass, rye silage and chicken manure. In contrast to previous studies, environmental impacts of flexible and the traditional baseload operation are compared. Life Cycle Assessment (LCA) was performed to detect the environmental impacts of: (i) variety of feedstock co-digestion scenarios by substitution of maize and (ii) loading rate scenarios with a focus on flexible feedstock utilization. Demand-driven biogas production is critical for an overall balanced power supply to the electrical grid. It results in lower amounts of emissions; feedstock loading rate scenarios resulted in 48%, 20%, 11% lower global warming (GWP), acidification (AP) and eutrophication potentials, and a 16% higher cumulative energy demand. Substitution of maize with biogenic-waste regarding to feedstock substitution scenarios could create 10% lower GWP and AP.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Ertem FC,Martínez-Blanco J,Finkbeiner M,Neubauer P,Junne S

doi

10.1016/j.biortech.2016.07.123

subject

Has Abstract

pub_date

2016-11-01 00:00:00

pages

536-544

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(16)31103-8

journal_volume

219

pub_type

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