How to melt plastic bottles to liquid
On her return to Denmark, Vestergaard began experimenting and melting plastic into moulds in an ordinary oven. She has now developed a series of plastic brick prototypes. Subsequent testing at DTU has revealed that the bricks can withstand up to six tonnes of pressure. Vestergaard has also succeeded in including foil-covered crisp bags in her brick concept.
This is a major achievement, given that these packets make up a large proportion of the plastic refuse. The bricks can contain up to 60 per cent crisp bags without this compromising their strength. Instead of spending the months following graduation seeking employment, Vestergaard will now immerse herself full-time in her brick project.
The next step will be to return to India. Lise Fuglsang Vestergaard presenting her plastic bag bricks during an exhibition in Copenhagen, Denmark. The challenge is to raise capital for the trip. Vestergaard aims to do so in partnership with the Danish NGO InnoAid , which identified the original refuse collection project in Joygopalpur.
She has also started collecting funds on her website. Many potential factors are involved in environmental comparisons of returnable vs non-returnable systems. Researchers have often used life cycle analysis methodologies to balance the many diverse considerations. Often the comparisons show no clear winner but rather show a realistic view of a complex subject.
Some bottles are sold empty to consumers with the intent for them to be used many times. These can be made of glass, metals, and a variety of plastics and can contain a variety of beverages. The consumer should wash the bottle and bottle cap after each use to assure proper sanitation. Some consumers wash and reuse plastic or glass bottles intended for a single use. Often this is for water bottles, but it can be for a variety of uses, including juices or other drinkable liquids.
Reused bottles could develop bacteria in the bottle between uses. Mouth contact to the bottle openings can easily transfer bacteria to the water content, which can contaminate both bottle and water. Contamination will cause bacterial and fungal growth in the water while kept in storage; if the user cleans the bottle thoroughly before reuse, the risk is much less. Some experts state that there's generally no harm in reusing your own water bottle, but the risk for ingesting harmful bacteria increases if you share your water bottle.
The main issue occurs when sharing bottles. Microbes present in my mouth may be harmful to others. Bisphenol A BPA can be a concern for some bottles made of polycarbonate which shares resin identification code 7 with other plastics.
High temperatures and bleaching are believed to increase leaching of BPA. Leaching of phthalates from PVC resin identification code 3 is also a concern, but PVC is not typically used for water bottles.
A university student's master's thesis falsely suggested that repeatedly rewashing plastic water bottles can lead to the leaking diethylhydroxylamine DEHA into the drinking water, and can be detrimental to human health. From Wikipedia, the free encyclopedia. New Zealand Ministry for Primary Industries.
Retrieved 26 September University of Nebraska Medical Center. Retrieved 13 February University of Idaho , Moscow: Archived from the original on