Energiforsyning i Arktis – hvilken vej vælger Grønland? - Artek ...

4. Discussion
If these theoretical amounts of energy can be
retrieved in praxis, Uummannaq would be able
to cover 17 percent, if using biogas, and 16
percent, if using bio-oil, of the yearly energy
use in the area This would save Uummannaq
somewhere between 5 7 and 6 million DKK
per year However these numbers are only
theoretical, therefore practical experiments
are being conducted to determine the energy
sufficiency in real life
Another important aspect is the fact that
these experiments were made on only one per
specie Therein lies a risk that the particular
specimen used for testing is not representative
for the whole specie
Assuming the data presented in this paper is
identical to what can be found in praxis; one of
the methods should be chosen over the other
In this case the biogas production stands out,
compared to bio-oil production Not because
biogas results in a greater energy production,
but because it is (theoretically) possible to use
all fragments of waste in biogas production
Bio-oil can only be retrieved from the parts
with a great oil-content and even for these
fragments there would still remain a waste
product not suited for use elsewhere
Obviously biogas production also creates a
waste product in the end This product can,
however, be used in the agriculture in for
example the south of Greenland or as fertilizer
for algae as proposed in the perspective
section
5. Conclusion
Analysis of the waste-material from fishing
and hunting in the Uummannaq area showed
potential for producing biogas and bio-oil
Calculated from the price of energy in 2009
of 3 71 DKK per kWh, the was te generated
by the fishing industry in Uummannaq
would amount to approximately 6 million
DKK when producing biogas and 5 7 million
DKK if producing bio-oil Compared with
the energy used in Uummannaq today, the
biogas production would be able to supply 17
percent of the energy and bio-oil production
could cover roughly 16 percent
In regard to the most beneficial method in
terms of both energy production and the
environment, the biogas production stands
16
out, compared with the bio-oil production,
because of its sustainability
6. Perspectives
As mentioned in the discussion, experimental
trials of the methane production are being
conducted to determine the amount of
energy that can be produced in praxis,
when producing energy from biogas As of
now (2010) all testing is carried out under
laboratory conditions, in other words; under
controlled conditions The aim is to obtain
enough experimental knowledge to be able
to test the biogas potential in praxis in
Uummannaq This will be carried out in a pilot
biogas plant in the summer period of 2011
The two greatest challenges are expected to
be controlling the process temperature and
secondly obtaining the right mixture of protein,
lipid and carbohydrates As described, the
waste material present in the Uummannaq
area is fish waste, which primarily consists of
lipid and protein This means that there is a
significant lack of carbohydrates available for
the biogas process
One of the solutions is to make use of the
algae, Ulvaria Fusca, which is found in great
numbers in the ocean around Uummannaq
and consists primarily of carbohydrates These
algae, however, are also used by the Greenland
halibut to lay their eggs in Harvesting algae
directly from the ocean could therefore end op
having critical consequences for the halibut
population and thereby the halibut industry
For this reason, testing of the possibilities
of using the degassed biomass as fertilizer
for controlled algae ponds is in progress, as
well, as an ongoing quest for other sources of
carbohydrates