3.6. Potential economic analysis for conversion
According to the results of the experiments, possible economic
analysis for the future application is made. If the output of biodiesel
is 1 tons, about 1.05 tons BSFL grease should be produced by
about 157.73 tons of biogas residue and 157.73 million of BSFL.
To meet the need of biogas residue, about 126.18 tons of corncob
and 353.17 tons of PM should be supplied. It is difficult to find
the accurate data of corncob yield from corn and pig manure yield
from pig in the open literature. As a general rule of thumb, corncob
accounts for about 1/8 of total weight of corn and every pig produces
about 2.5 kg feces every day. Meanwhile, data from FAO
(food and agricultural organization) showed that corn yield in
2013 was about 60161.58 kg/hectares. In total, at least 16.78 hectares
of acreage for planting corn and 387 pigs in farm can meet
the output needs of producing 1 tons biodiesel during a year. But
there are various errors may exist in expansion application that
makes the reasoning data inaccurate. However, this research is
conducted to study the feasibility of producing biogas and biodiesel
by corncob, PM and BSFL, analysis on the costs from the possible
application in future which involves a lot of practical issues
need further research, such as problem of expansion application
of energy production, distribution of raw materials and problem
of transportation means and routes, especially the shortest path
problem for transportation which can utilize the method of setting
up complex mathematical model and using software of Matlab or
Lingo to analyze. Meanwhile, insect protein can also be obtained
from BSFL which can be another source of economic except grease