Plastic waste urban

In particular, as far as the plastic catalytic degradation is concerned, there are various possible scenarios. In large urban areas the best approach probably is to build a plastic waste pyrolysis plant in an acceptable near area at not to great distance, in order to minimize transport cost of the plastic waste. In that case, safety and environmental concerns of such a new plant should first be denied with satisfactorily before the new plant can get the go-ahead. Near refineries however, the best approach might be to co-feed plastic waste with oil fractions into refinery crackers, or even have a unit of pure thermal pyrolysis first with the produced wax-type fraction to be upstaged in another reactive refinery process. In the first case of co-feeding, a lot of research has to be carried out, addressing aspects of defluidization mainly, before an alteration of a process of the scale of FCC units can go ahead. 

Storage of wastes at landfill sites Finding enough landfill sites for this purpose becomes hard due to the rapid urbanization process taking place all over the world. On the contrary, burial of plastic wastes in landfills appears to be only a temporary solution, leaving todays problems for future generations to solve. 

Litter Problem Plastics waste in urban litter does pose a serious and real waste management problem. Unlike paper, plastics do not degrade in the outdoor environment at a fast enough rate compared to that of littering. The result is a serious aesthetic problem in highly populated urban areas in almost any part of... 

The NEWPLAST-PROCESS line consists of three modular zones. Each zone can be entirely automated to produce a compound made from mixed plastics waste from industrial and/or urban sources. In the first area (Zone I) (Figure 1), waste is prepared for processing. The equipment used depends on the contamination level of the feedstock materials. 

The main advantage of this technology is that it can process heterogeneous mixed plastics wastes from urban waste into a thermoplastics compound with well accepted physical properties. The product can be obtained with a total processing cost which is today 30-40% of a virgin polymer cost of similar properties. 

Due to industrialization of the process, the only sure feedstock source of large quantities of plastics wastes is from urban wastes, not only in large quantity but also with a certain consistency in composition. 

Recycling of Plastics from Urban Solid Wastes Comparison Between Blends from Virgin and Recovered from Wastes Polymers... 

Recycling of Plastics from Urban Solid Wastes... 

By the flotation method, a light and a heavy fractions were separated from urban plastic wastes in an industrial plant. In Table 2, Mix 5 corresponds to the light fraction, whose composition was estimated by thermal analysis Mix 6 is a blend of virgin HDPE with 25 wt% of the heavy fraction. 

The problem was studied by comparison between the pol3rmer blend of the plastic waste fraction and pol3rmer blend, having similar composition, but obtained from virgin pol3rmers. The technology was applied to the film plastic waste fraction present in urban solid wastes from Madrid (Spain) and was developed diiring the 1983-1986 period. 

The film plastic wastes were supplied by ENADIMSA from the Municipal Treatment Plant of Urban Solid Wastes in Valdemingomez (Madrid). The identification of pol3miers present in plastic wastes was carried out by IR and DSC methods. The results are compiled in Table 1. 

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