Waste Management 4109 Lab Assignment #1 The idea of a life cycle analysis is to
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Waste Management 4109 Lab Assignment #1 The idea of a life cycle analysis is to think of a material from its birth (cradle) to death (grave), and at each stage of the material's life cycle, energy and materials are consumed and waste (air, liquid and/or solids) are generated. For example, paper is born when a tree is cut and the grave is the landfill. If we think in terms of a life cycle, then we try to reduce energy and material consumption all along with way, and hence, also try to reduce waste outputs. For example, if bleached white paper involves the discharge of dioxins at a pulp mill early in its life, then we should ask whether bleached white paper is worth it, and maybe it is. The life cycle thinking raises these questions. All materials are either grown (e.g. cotton or wool) or mined (e.g. metals, plastics from oil/ gas byproducts) and unless the material is eternally recycled (e.g. gold and diamonds), it will experience the grave in either the air (e.g. from incineration), water (e.g. from a sewage treatment plant) or land (e.g. a landfill or other land disposal). There are no other choices. In 500 (+/-10%) words, discuss the "cradle to grave" life cycle of a glass bottle, newspaper or a car tire. Ensure that you use at least 3 references.Explanation / Answer
Life cycle of a glassbottle
It's made from opaque sand, yet it's completely transparent glass is made from liquid sand. You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it melts and turns into a liquid. You won't find that happening on your local beach: sand melts at the incredibly high temperature of 1700°C (3090°F).
Glass is such a popular material in our homes because it has all kinds of really useful properties. Apart from being transparent, it's inexpensive to make, easy to shape when it's molten, reasonably resistant to heat when it's set, chemically inert (so a glass jar doesn't react with the things you put inside it), and it can be recycled any number of times.
Once the sand is melted, it is either poured into molds to make bottles, glasses, and other containers, usually, other chemicals are added to change the appearance or properties of the finished glass. Bulletproof glass is made from a sandwich or laminate of multiple layers of glass and plastic bonded together. Toughened glass used in car windshields is made by cooling molten glass very quickly to make it much harder.
The consumer throws glass into a recycle bin. Glass is taken from the bin and taken to a glass treatment plant. The glass is sorted by colour and washed to remove any impurities. The glass is then crushed and melted, then moulded into new products such as bottles and jars.
Lifecycle of a newspaper
A newspaper is a printed periodical whose purpose is to deliver news and other information in an up-to-date, factual manner. Newspapers appear most commonly in daily editions, but may also be issued twice a day or weekly
A newspaper is printed on thin paper made from a combination of recycled matter and wood pulp, and is not intended to last very long. Typically, trees used for papermaking are specifically grown and harvested like a crop for that purpose. bark is removed, and through chippers, where spinning blades cut the wood into 1" pieces. Those wood chips are then pressure-cooked with a mixture of water and chemicals in a digester.
The pulp is washed, refined, cleaned and sometimes bleached, then turned to slush in the beater. Color dyes, coatings and other additives are mixed in, and the pulp slush is pumped onto a moving wire screen. As the pulp travels down the screen, water is drained away and recycled. The resulting crude paper sheet, or web, is squeezed between large rollers to remove most of the remaining water and ensure smoothness and uniform thickness. The number of trees and other vegetation cut down in order to make paper is enormous
collect the news from various sources print it sections wise like sports, politics, films, fashion etc. collect all the old newspaper send them for recycling create pulp and put it beater and spread the pulp in plates it comes out as paper again we can use it.
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