The designed equipment alignment enables the efficient processing of MSW and results in the recovery of at least an additional 8-10 percent of the black bag waste stream, which is recyclable material such as types 1 and 2 plastics, cardboard,
aluminum, tin, and glass. Even with the best efforts applied to source separation recycling programs, some of this material is currently missed and ends up in landfill.
The process begins with the delivery of MSW to the plant by the garbage pick-up trucks used by
the region delivering waste to the facility. The MSW
or biowaste is dropped on to a tip floor, with the overhead grapple operator
removing any obvious hazardous or large materials to the side for either later use or disposal. The remaining materials are then moved to the incoming material hoppers, where they are transferred on to transverse conveyors, which feed onto the incline conveyors
for auto sorting or onto the initial manual sorting station, and on to bag busters. The materials are then passed through a large material trommel, where smaller items are deposited through the small material trommel and/or on to separators, screens and a plastic removal system to positively select those materials that are to either be used in the pellet or sold as recyclable product. The remaining minor amount of materials that must still be
sent to landfill, are then stored until sufficient amounts are retained to
be sent via truck to the selected landfill site.
During the process eddy current separation and magnets are used in several locations to select both ferrous and non-ferrous materials for delivery to the recycling markets.
The positively selected materials that are moved on for use in
manufacturing the fuel pellet are then shredded, fiberized,
and stored in a silo. This stored material is then mixed with high BTU materials such as carpet waste, poly film or other acceptable materials and then pelletized and stored for sale and transportation to their final destination for use as a
renewable alternate fuel.
The NRG Pellets are used to create green energy.
Harnessing Agricultural Wastes for Energy
Each year the agricultural industry produces millions of
tonnes of waste plant matter containing energy that is either
burned or unused.
Agricultural waste comes in a wide and plentiful variety.
Cassava stems and stalks, rice husks, forestry wastes, wheat
straw, maize stalks, chicken litter, green bark, sawdust and
chips, corn cobs and stubble, peanut hulls, cotton seed hulls,
sugar cane trash, oil seed plant waste, grass cuttings to name
but a few. All have an energy value.
Using modern technology the Global NRG processes these
wastes so they can be harnessed to provide a clean renewable energy
resource. These biowastes can be turned into NRG fuel pellets
of varying calorific value to suit the end user's
specifications, replacing fossil fuels in many instances or
can be gasified.
Gasification of the pelletized waste in the Global NRG
process produces a synthetic gas with properties similar to
natural gas, called syngas. Syngas is an ideal way of storing
biowaste energy.
Syngas can in turn be used to create steam via boilers or
gas turbines to generate green electricity, or to fuel gas
internal combustion engines to drive electricity generators or
provide mechanical power for industrial and farming use. Syngas
can be used for domestic heating purposes or converted into
ethanol, methanol or biodiesel for use in transport, and has multiple
applications in the chemical industry.
All of this is done in harmony with food production as the
Global NRG process does not use the food component only the
waste, or can use
special oil producing crops such as Jatropha or Stinkweed
(Pennycress) that are not used in the food chain for humans or
animals. Other high yielding crops such as cassava can be
especially grown for their energy value. Most countries that
grow enough food to feed themselves generate sufficient waste
to provide more than 68% of their energy needs in the form of renewable
energy resources.
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