The recycling of pet waste bottles in Shanghai is mixed.
pet bottles are recognized as one of the best plastic packaging materials with the best adaptability to environmental protection at home and abroad (some people even call them green packaging materials). At present, they have become one of the fastest growing and most widely used plastic packaging containers in the world
high recycling rate of pet waste bottles
high recycling rate of pet waste bottles is mainly due to the high utilization value of pet waste bottle recycling. The recycled PET pellets from pet waste bottles have been successfully reused in spinning, blow molding and other aspects. Their deep-processing products (such as carpets or pesticide bottles) have been fully recognized in practical applications, both in terms of usability and economy. Therefore, the price of recycled PET pellets is quite high, which can reach about 70% of that of new pet pellets. In addition, the quality (weight) of pet waste bottles is large. For example, the quality of pet for a coke bottle with a capacity of 1.2 liters is more than 40 grams, while the quality of pet for a mineral water bottle with a capacity of 500 ml is more than 20 grams
it is "profitable" to engage in the recycling of pet waste bottles (at present, the purchase price of general plastics in Shanghai is only about 0.8 yuan/kg, while the purchase price of pet waste, which is the waste bottle of the limit rod, is more than 1.5 yuan/kg), which promotes the smooth progress of all links of PET recycling and effectively prevents pet waste bottles from flowing into the garbage dump and being fully recycled
the capacity of regenerative granulation is far greater than the current demand for
pet waste bottles. It is the variety with the highest recycling rate among all kinds of plastic packaging wastes in Shanghai, and its recycling rate is close to 100% (at least more than 95%). Shanghai Waste Management Office reported that at present, there is no trace of PE such as 43r/min6 and pressing the start key t bottle in Shanghai's urban garbage, while other recyclable plastic packaging wastes, such as EPS tableware, which is listed as a key product of Shanghai's environmental governance, have been recovered and utilized nearly 70% through various efforts, but they are still common in Shanghai's urban garbage
at present, the production capacity of regeneration and granulation of pet waste bottles in Shanghai is estimated to be more than 100000 tons/year, which is far greater than the actual needs of processing the current pet waste bottles. Therefore, even if the production and application of PET bottles are further developed, there will be no problem in the supply of regeneration and granulation
the problem of waste water treatment needs to be solved.
instead, it is the problem of waste water treatment generated during the regeneration and granulation of pet waste bottles that needs attention. At present, the recycling of pet waste bottles in Shanghai is basically carried out by small enterprises using physical regeneration method. The waste water generated in the regeneration process is generally disposed by directly discharging to the river, and there is basically no standard purification treatment. For each ton of pet pellets regenerated, at least 3-5 tons of waste water will be generated. For 100000 tons of pet pellets regenerated every year, 300000-500000 tons of waste water will be generated
although the environmental protection in Shanghai has been strengthened continuously, the treatment of waste water in the regeneration process of pet waste bottles has not seen a fundamental change. The change only lies in the transfer of the regeneration site of pet waste bottles from the suburbs to the outer suburbs and from the suburbs of Shanghai to the surrounding areas such as Jiangsu and Zhejiang. Therefore, it is a very urgent task for us to do a good job in the waste water treatment of pet waste bottle recycling granulation enterprises
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