BGP PROGRAMS

Municipal SOLID WASTE

Municipal Waste may be handled by the BGP technology in a couple of different ways.

The first way is by using different sizes of BGP machines from the 900 Cu. ft. to a 1100 Cu. ft.. These machines would handle about 4 ton/day to 10 ton/day of compacted standard municipal waste. A reverse acting compactor/loader moves from machine to machine and an overhead gantry drops the waste into the loader for compacting and then insertion into each machine. For approximately every 20 machines, there would be one gantry loader system. If the waste is screened and separated, there could be no need for abatement systems. Under normal circumstances, with limited separation, a full abatement package would be required to meet modern standards. This type of system is most suitable for smaller and remote communities, especially in areas where landfill is a poor option. It can also complement a total waste management facility, in large communities, working together with composting and state of the art landfill technologies.

The second method is to receive municipal waste into a building for segregation into recyclables, hazardous waste and batteries leaving residual waste for pelletization. The sorting system has the capacity to process up to 32 tons per hour. The material for recycling can be sold for revenue to be used against the operation of the plant. The residual waste will be put into a shredder and pulverizer system. Eventually the pulverized product will be put into a hopper above a pelletizing system. At this point hydrocarbons, rubber and shredded carpet will be introduced into the pulverized material and mixed and fed into the pelletizing system. The mixture will be processed into pellets 1 1/4 in diameter and 3 to 4 inches long. With this system approximately 94% of its moisture content is removed. In this state odours are eliminated and the BTU value of the pellets is approximately 12,500 to 14,000 BTU per pound. By pelletizing the waste into high density pellets it will reduce volumes of waste to be disposed, burn longer, produce more heat for steam production and leaves less residue. This process connected with a BGP POWER PACK cogeneration system will provide electricity by disposal of municipal waste. It is well suited for large municipalities as large volumes of waste can be pelletized.

The following description is a typical WTB facility:

All trucks bringing waste product to the process plant will pass over the weigh scale at the gate, enabling efficient and accurate tonnage measure to book to each customer.

The building described above is equipped with several overhead doors at the front of the building for incoming MSW and at the side of the building for the bales of used tires. At the front, all incoming MSW waste will be loaded into a large in-ground hopper system with a live bottom. The MSW is inspected to see if there has been any hazardous waste mixed in.

Any hazardous materials would be removed at this time, before it reached the sorting section. A continual video recording is kept on trucks dumping into the hopper, if unacceptable waste is discovered, a review of the videotape is made to identify the truck that delivered and unloaded the questionable waste. Unacceptable waste is placed in a container, and returned to the trucking company at their cost. The moving floor in the hopper moves the garbage to the back of the hopper and drops onto belt conveyers which. feed onto four steel incline pan conveyors. Several garbage trucks can dispose of their loads at any one time.

The incline pan conveyors will move the waste product to the bag slitting units and feed the waste into the Trommel screening plants (classifier/separator systems). Where the entire fiber is removed at the first stage of the separator system, the remainder shall drop through onto the second stage where all glass, tin, aluminum cans, and plastics drop off onto a belt conveyor. The fines will drop through onto a belt conveyor; the fines shall be mixed back into the waste stream after the Recyciables are separated. At the second stage were the Recyciables drop onto the belt conveyor, the first stage all the tin shall be removed with a ferrous belt magnet, the second stage all of the glass shall be automatically removed.

The third stage all of the plastics shall be automatically removed, at the fourth stage all the aluminum cans shall be automatically removed. The remaining product shall drop off onto the fines conveyor which runs under the sorting system. At this section of the system, two persons shall be required to remove any batteries or any waste products, which might damage the shredder. Each sorting system has the capacity to process up to 32 tons per hour. Four sorting lines processing MSW sixteen hours per day.

The sorting systems will automatically remove and disperse all tins, glass, plastics, and aluminum, into collection bins. These materials will be baled and shipped to the various recycling companies. The revenue at current rates for such recovered materials, are anticipated to cover the maintenance costs of the plant.

The remaining waste will be fed through a belt magnet to remove any metal that may remain in the product. The rest will drop into the shredder and pulverizer system. At this time, the newspapers shall be re-entered into the system where the waste will be broken down into a fine fluff product. The pulverized product will drop into a covered hopper and the waste shall feed into a screw conveyor that will carry the product up into the large hopper above the pelletizing system. At the hopper, bottom ash, hydrocarbons, rubber and shredded carpet shall be introduced into the system, where an agitator will mix and feed the product into the pelletizing system.

The product shall be processed into pellets approximately 1 ¾"diameter and 3 to 4 inch long. With this system approximately 94% of its moisture content is removed. This virtual elimination of moisture eliminates odours and brings the BTU value of the product 12,500 to 14,000 BTU per pound. By pelletizing the waste into high-density pellets it will burn longer, produce more heat and leave fewer residues.

All of the sorting systems are custom-designed to handle sorting needs in the most productive, state-of-the-art fashion. All of the sorting systems are made with heavy steel pan and belt conveyors. They are equipped with productivity-enhancing features such as interval switches; variable speed self-cleaning sorting belts, overload disconnects and electronic eyes.

All MSW entering the facility each day shall be processed before the day shift is finished; nothing shall be stored outside, or left until the next day. This is essential, in order for the wash down system to operate. The high-tech design of our system allows for a high capacity, low maintenance operation.

The following is a description for reliability, design, and construction of an MSW Fuel processing facility. The operation will contain a four independently operating lines (or modules). The modular design approach has several advantages including:

o Reduced downtime due to designed redundancy.
o Ensured throughput in the event of equipment breakdown in one of the lines or modules.
o Easy to increase capacity (additional modules may be added at any time).
o Ample time for preventative maintenance program and/or additional process capabilities.

The MSW pellets produced by this method are then pumped into the BGP units for destruction and cogeneration of electricity. ( See Cogeneration Section for information )