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Topics
List:
Environmental
impact assessment for gasification gas-supply
system
Economic
feasibility Analysis of Municipal Waste Power
Generation
Biopower
& the Environment
Environmental
impact assessment for gasification gas-supply
system
¡¡Using
biogasification centralized gas-supply technologies,
it is possible to set up a full set of energy
system based on rich agricultural and forestry
stalks resources, and to transform the old energy
production and consumption mode. It will reduce
centralized emissions from burning plenty of crop
stalks in harvest season, which cause atmospheric
pollution. And it will replace commercial energy
so as also to alleviate atmospheric pollution
of fossil fuel consumption. If counted by a substitution
of 0.17 kgce per m3
gas,
it will substitute 372 kgce for per household
with annual gas consumption of 2,190 m3.
Thus, for 200 household gas users, it will reduce
coal consumption of about 75 TCE per year. If
counted by a substitution of 0.7 t coal per ton
crop stalks, it will reduce emissions of CO2,
SO2
and
smoke dust by 14,000 t, 140 t and 100 t, respectively.
In
addition, using the gasification technologies,
it will bring obvious changes for the environment
and the appearance of the rural village, and be
beneficial for cooking, alleviating women¡¯ s labor
and saving time.
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Economic
feasibility Analysis of Municipal Waste Power
Generation
a.
Economic feasibility
The
economic feasibility of refuse power generation
project concerns the whole procedure of the biogas
production from refuse. Firstly, the production
rate, production and collection rate is determined
by the scale and technical design of the landfill
plant. Landfill plant with the scale of over 1
million tons of refuse, 10 ha of area or 10 meters
of landfill has higher rate of return on investment
of biogas power generation. Meanwhile, the biogas
collection system of a landfill plant is very
important too. If the biogas collecting pipeline
and refuse leaching solution system are built
before the plant started, the production rate
and collecting rate of biogas will be higher than
75%. If the power generation project is to be
built in a complete landfill plant, the biogas
has to be collected by pothole, so the production
rate and collecting rate cannot be very high.
Second,
electricity price is also a very important factor.
In
the aspect of policy, the economic feasibility
of biogas power generation project will be improved
greatly with beneficial tariff and credit and
implementation of environment protection laws.
b.
Environmental characteristics
Landfill
biogas power generation is developed to prevent
environment pollution, so the second pollution
to environment is also avoided. The regional environmental
benefits of the construction and operation of
this project are:
1)
Avoid the explosion and fire caused by landfill
gas.
2)
Prevent the pollution to underground water. Sewage
disposal system must be installed in standard
landfill plant, so the landfill leaching solution
won't leak.
3)
Helpful to GHG emission reduction. Since the emission
reduction of 1 ton CH4
equals
to that of 25 tons CO2,
so the implementation of landfill power generation
is very beneficial to the emission redact of GHG
such CH4,
etc.
4)
Recovery of landfill biogas can reduce the bad
smell of gas emissions greatly.
5)
Not only the harm to environment from landfill
gas, but also the pollution from conventional
energy power generation can be reduced by landfill
power generation.
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Biopower
& the Environment
One
of the principal benefits of using biomass for
producing electricity is its benign effect on
the environment. These benefits derive from the
sustainable collection of biomass and the production
of electricity in modern, high-efficiency and
clean power systems.
Today's
biomass power systems run on fuels collected from
residues of the forestry, forest products, and
agricultural industries. By using these residues
for power production, the need to dispose of them
in places such as landfills is eliminated. In
agricultural areas, for example, biomass power
systems have proven their ability to reduce serious
air pollution problems from in-field burning of
crop residues such as rice straw.
Furthermore,
biomass power can provide a market for sustainable
forestry practices such as forest thinning. And
in the future, energy crops grown for use in power
systems may provide erosion protection to sensitive
land and protect riparian areas.
Use
of biomass power systems substantially reduces
air pollution compared to conventional fossil-fuel
systems. When biomass fuels are used in advanced
power systems, emissions are very low. And when
biomass is harvested in a sustainable manner,
the net release of greenhouse gases such as carbon
dioxide into the atmosphere is very small.
As
a result of these environmental benefits, consumers
may consider biomass as part of a green power
portfolio.
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Overview
of Environmental Benefits outlining sustainable
land use and improved air quality.
-
Potential
Benefits of Energy Crops include improved
habitat for wildlife and reduced use of fertilizers
and insecticides compared with lands used
for row crops, protection of riparian areas,
and erosion protection for sensitive land
areas.
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Reduced
Emissions from power systems running on biomass
fuels take place because the chemical make-up
of biomass compared with fossil fuels.
-
Reduction
of Greenhouse Gases from biomass power takes
place because the carbon dioxide released
during combustion is absorbed by the plants
as they grow.
-
Green
Power Programs are gaining as consumers recognize
the benefits of renewable electricity produced
from biomass.
Biomass power technology Characterization gives an overview of
the expected cost, performance, and environmental
characteristics of renewable energy technologies,
including biomass.
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