Sustainability assessment of biogas plants
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A methodology for the sustainability assessment of agricultural
anaerobic digestion (AD) plants (biogas plants) is discussed.
It consists of many different models like for instance
eco-efficiency models with using the Economic Value Added (EVA)
model and Data Envelopment Analysis (DEA) models to evaluate
Sustainable Value Added (SVA) of the agricultural AD plant. One
of the most used and most common methods for measuring
corporate sustainability which incorporates the three
dimensions (economic, environmental and social) is called “the
triple bottom line approach”. It calculates the value by using
not only financial but also non-financial resources. This value
is called SVA. This approach simplifies the measurements and
allows the sustainable performance of agricultural AD plants to
be measured in monetary terms depending on the data
availability on the farm level as well as on the benchmark. It
shows how much value of biomass energy recovery is created as a
result of using economic, environmental and social resources,
compared to a benchmark. In order to use this method, the
benchmark company should be chosen. In our research, DEA is
used for this purpose. It is a very powerful mathematical model
of decision-making in farms with AD plants. The main purpose of
applying this analysis is to evaluate the level of efficiency
of biomass energy recovery of farms in Moravia region. The
efficiency in our case is represented as a share of output in a
weighted sum of inputs. In other words, it depicts a certain
degree to which desirable outputs can offset key performance
economic, environmental, social and corporate governance
indicators. The case study of aggregated SVA of biogas plants
of Moravia region is presented.