Plastic wastes energy recovery

Total plastics waste Energy recovery Material recycling... 

Recycling of polymer materials is also increasingly desirable due to the overall environmental and social benefits, particularly for plastics from post-consumer waste. Energy recovery from plastic waste and the biodegradation of packaging materials are other areas of recent development. 

Eor (1), MSWIs, the maximum bonus is limited by the calorific value of the plastics waste (about 40 MJ/kg). Eurthermore, the energy recovery is relatively low due to technical limitations in comparison to normal power plants. Normally, at best some 20% electrical energy is recovered (or some 50%-70% calculated as primary energy). 

Potential maximum energy recovery versus practical achievable energy recovery of various plastics waste... 

Coal used in power stations has the potential to be partly replaced by fuels derived from pre-treated plastics and paper waste, reducing both dependency on fossil fuels and reliance on landfill. APME reports on a project in the Netherlands which it co-sponsored to develop a substitute fuel from plastics. The environmental assessment of the project compared the environmental impacts of coal substitution with other plastics recovery methods, including gasification in feedstock recycling and energy recovery from plastics waste in cement kilns. The study also compared coal substitution with the generation of power from burning biomass. 

Incineration with energy recovery is examined as a means for the disposal of plastics waste, and data are presented for the calorific values of a number of materials. Chemical recycling techniques are also briefly reviewed. 

A feasibility study has been earried out by EPI Asia on behalf of PACOA s Plastics Environment Council into the viability of energy recovery from municipal waste. It is claimed to have demonstrated that a 250,000 tpa plant processing from a population catchment of 500,000, would generate a new 15M We of electricity, and that given a gate fee of 50 Australian dollars per tonne for delivered waste, and power sales of 6 cents per Kwh, the plant would be viable. The recycling process is described. 

ENERGY RECOVERY THROUGH COMBINED INCINERATION OF MIXED PLASTICS WASTE AND SOLID MUNICIPAL WASTE... 

The origins and composition of plastics wastes and factors affecting their recycling are discussed. Partieular attention is paid to chemical recycling and incineration, with and without energy recovery, and a number of developments in chemical recycling techniques are examined. 19 refs. 

Davos, 15th-19thMay 1995, paper 60. 8(13) COMBUSTION AND ENERGY RECOVERY OF WASTE PLASTIC BY INTERNALLY CIRCULATING ELUIDISED BED BOILER Tsukamoto K Kurihara K EBARACorp. 

This paper introduces the Twin-Interchanging Fluidised Bed Incinerator (TIF) from EBARA Corp. of Japan, and describes a combustion test carried out by the company in collaboration with the Plastic Waste Management Institute, on waste plastic separated from municipal refuse, verifying the level of non-polluting combustion and high-efliciency energy recovery. The results of the test are presented, with considerations and conclusions. JAPAN... 

The recycling of plastics waste is eonsidered with respect to energy recovery through incineration. It is claimed that burning solid municipal waste could produce nearly 10% of Europe s domestic electricity and heat and conserve resources by replacing, for example, over half of current coal imports to Western Europe. The potential for power from waste plastics and examples of energy from waste in action are described. 

Combustion of plastics waste with energy recovery is discussed as one approach to the recycling and waste management of waste plastics. Their role in municipal solid waste combustion is examined, and the importance of refuse derived fuel pellets. Facts supporting the importance of waste to energy projects are reported, and details of some projects currently examining MSW combustion with energy recovery are detailed. 

Brussels, 1994, pp.8. 12ins. 24/3/95. 8(13)5 ENERGY RECOVERY THROUGH COCOMBUSTION OF MIXED PLASTICS WASTE AND MUNICIPAL SOLID WASTE... 

Test results are presented and discussed following trials in which energy recovery of mixed plastics domestic waste and municipal solid waste was carried out by means of co-combustion. The research also involved the collection of data relating to emissions, and the levels of halogens, dioxins and furans and heavy metals within the mixed plastics waste. 

This paper demonstrates the technical feasibility of a plastics energy recovery plant using circulating fluidised bed technology from Ahlstrom of Finland. Full details are given of a two-phase test run conducted at Ahlstrom s pilot plant in Karhula, in order to obtain information on the process behaviour when combusting different types of plastics waste. Results are presented and conclusions drawn. 

This paper analyses the difficulties of the two traditional plastics waste recovery routes, energy recovery and mechanical recycling, and goes on to introduce a third... 

This article provides brief information from a study carried out in the Netherlands, which revealed that combustion with energy recovery is the most economical way of processing waste plastics, whilst mechanical recycling is the most environmentally attractive option. 

Energy recovery from packaging waste is discussed, with particular reference to the co-combustion of mixed plastics with other conventional fuels such as wood, coal and peat. Experimental work is described in which a project was established to evaluate the possibility of energy recovery from a circulating fluidised bed boiler using packaging from different sources as fuel. The role of sulphur in the formation of PCDD/F in the combustion process was also studied. 

Energy recovery to reduce the amount of waste plastics going to landfill is shown by eco-balance studies to be more environmentally beneficial than recycling, it is reported. Advantages of the method and statistics to show current levels of activity are reported, and also the investment required by a company to operate such a process, and the running costs involved. 

Mixed plastics waste appears to be well suited for use in energy recovery, either as a co-eombustion fuel in a power plant designed for solid fuels, or as the sole fuel in speeially designed plants. This paper reports test results on the co-combustion of mixed household plasties with eoal. The tests were performed in a bubbling fluidised bed low-pressure steam boiler. The results show that both inorganic and organic total specific emissions were lower for mixed household plasties than for coal. Tabulated data are presented. 3 refs. 

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