...INCINERATOR Construction Incinerator is in the shape of a vertical cylindrical chamber with an inverted funnel shaped chimney at the the top. The cylindrical chamber consists of a burning chamber just as in case of oil fired burners, which are lined with refractory materials at the inside. An oil fired burner is provided to initiate the ignition process. It is extremely important that the temperature inside the cylinder is controlled and for this reason thermostats are used. To provide an uninterrupted flow of air for the combustion, forced draft fans are provided. The air supplied is directed upwards in swirls with the help of strategically designed ports. A rotating shaft with blades is attached at the center, which helps for a faster combustion process and also prevents incomplete combustion. The ash and the residue thus generated due to the combustion is forced at the periphery by this rotating shaft. The ash is pushed into an ash hopper and it gets collected there. A door is provided to dump the waste inside the incinerator. This door pneumatically operated and when opened shuts down the fan and the burner automatically. Not all the ash gets collected in the ash hopper. Some of the ash due to the forced air goes up to the chimney with the smoke. To remove this ash from the smoke a char eliminator is used. A char eliminator is similar to a filter paper. A sight glass is provided at the side of the incinerator to keep a watch at the burning process. All the processes...
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...Environmental assessment of bio-based polymers and natural fibres Dr. Martin Patel*), Dr. Catia Bastioli**), Dr. Luigi Marini**), Dipl.-Geoökol. Eduard Würdinger***) *) Utrecht University, Department of Science, Technology and Society (STS), Copernicus Institute, Padualaan 14, NL-3584 CH Utrecht, Netherlands; Phone: +31 30 253 7634; Fax: +31 30 253 7601; E-mail: m.patel@chem.uu.nl **) Novamont, Via Fauser 8, I-28100 Novara, Italy; Phone: +39 0321 699 611; Fax: +39 0321 699 600; E-mail: bastioli@materbi.com, marini@materbi.com ***) BIFA (Bavarian Institute of Applied Environmental Research and Technology), Am Mittleren Moos 46, D-86167 Augsburg, Germany; Phone: +49 821 7000-181; Fax: +49 821 7000-100; Email: ewuerdinger@bifa.de Table of Contents 1. INTRODUCTION 2. HISTORICAL OUTLINE 3. METHODOLOGY OF LCA 4. PRESENTATION OF COMPARATIVE DATA 4.1 STARCH POLYMERS 4.1.1 Starch polymer pellets 4.1.2 Starch polymer loose fills 4.1.3 Starch polymer films and bags 4.1.4 Starch nanoparticles as fillers in tyres 4.2 POLYHYDROXYALKANOATES (PHA) 4.3 POLYLACTIDES (PLA) 4.4 OTHER POLYMERS BASED ON RENEWABLE RESOURCES 4.5 NATURAL FIBRES 5. SUMMARISING COMPARISON 6. DISCUSSION 7. CONCLUSIONS 7.1 7.2 SUMMARY AND FURTHER ELABORATION OF FINDINGS OUTLOOK AND PERSPECTIVES 8. ACKNOWLEDGEMENTS 1 9. REFERENCES ANNEX 1: OVERVIEW OF ENVIRONMENTAL LIFE CYCLE COMPARISONS FOR BIODEGRADABLE POLYMERS INCLUDED IN THIS REVIEW ANNEX 2:...
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...Incineration is one of the most popular waste management strategies in the developed world. It reduces trash volume prior to dumping in the landfill. But my environmental and ethical factors surround this issue. Does incineration legalize waste generation and reduces an incentive for reusing and recycling? This article looks at the advantages and disadvantages of incineration as a waste management strategy and discusses the major types of incinerators used. Incineration essentially involves burning waste at a high temperature, also called thermal treatment, to reduce trash volume. The compacted waste can subsequently be dumped into landfills. Combustion converts waste into ash, water, flue gases, and heat. Depending on the type, quantity and chemical composition of waste fuel, toxic compounds containing halogens, metals, nitrogen and sulphur are often produced. The flue gas, which contains large amounts of carbon monoxide, is a major pollutant and hence, needs to be treated before it is dispersed into the atmosphere. In the recent times, incinerators are also being seen as energy-recovery units, wherein the heat produced from combustion of waste can be utilized for power generation. Though incineration can be carried out without energy recovery, there is a continuous shift towards utilizing waste as a resource via power generation. For substances that cannot be recycled, the ‘waste- to-energy’ process may seem to be a suitable solution. However, despite the advances in incineration...
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...these problems. There are several technologies to manage waste pollution. These technologies include recycling, incineration, and sanitary landfills. This will strictly discuss the problem, Methods/Technology, and Beneficial aspects of Incineration. Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials. Incineration and other high temperature waste treatment systems are described as "thermal treatment". Incineration of waste materials converts the waste into ash, flue gas, and heat. The ash is mostly formed by the inorganic constituents of the waste, and may take the form of solid lumps or particulates carried by the flue gas. The flue gases must be cleaned of gaseous and particulate pollutants before they are dispersed into the atmosphere. In some cases, the heat generated by incineration can be used to generate electric power. There are several types of incineration technologies: Rotary-kiln, Burn Barrels, Fixed grates the typical amount of net energy that can be produced per ton municipal waste is about 2/3 MWh of electricity and 2 MWh of district heating. Thus, incinerating about 600 metric tons (660 short tons) per day of waste will produce about 400 MWh of electrical energy per day (17 MW of electrical power continuously for 24 hours) and 1200 MWh of district heating energy each day. Incineration has a number of outputs such as the ash and the emission to the atmosphere of flue gas. Before the flue gas cleaning...
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...tempting market for biotechnology goral enterprises. Biotechnological processes are being developed as an alternative to existing route or to get new biodegradable biopolymers . 20% of solid municipal wastes in US is plastic. Non-degradable plastics accumulate at the rate of 25 million tones per year. According to an estimate more than 100 million tones of plastic is produced every year all over the world. In India it is only 2 million tones. In India use of plastic is 2 kg per person per year while in European countries it is 60 kg per person per year while that in US it is 80 kg per person per year. * disposal of waste plastic Incineration is a waste treatment technology that involves the combustion of organic materials and/or substances. Incineration and other high temperature waste treatment systems are described as "thermal treatment". Incineration of waste materials converts the waste...
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...If done right, landfills can be a viable disposal option. If done wrong, they can be an environmental and economic disaster. The main problem with landfills is that they are complicated structures that are difficult to maintain. Of particular concern is the wastewater created inside landfills as leachate. In order to keep the toxic material from leaking into the local drinking water, these football stadium-sized holes require a combination of liners made from clay, high-density polyethylene (HDPE) plastic or composite membranes. But according to the Environmental Research Foundation in Annapolis, Maryland, clay will dry and crack over time, HDPE will degrade with household chemicals, and composite liners made from clay and plastic will leak somewhere between 0.2 and 10 gallons a day after ten years. Even with complex leachate collection plumbing built into landfills, none of these solutions is 100% foolproof (collection pipes tend to clog and back up). "The EPA technicians that currently oversee landfill design and regulation have said that their own engineering standards would not last," warns Will Ferretti, executive director of the National Recycling Coalition. "They're saying that they could break down in a 30-year time frame. It's clearly a concern and we have asked the EPA to revisit their regulations in that light." To be fair, however, recycling doesn't clear every environmental hurdle either. Products remade from recycled waste such as paper and plastic go through...
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...Method 1 – Incineration * Incineration is one of the methods of waste management and is quickly becoming the most common method for authorities around the world * Incineration is a practical method of disposal that saves a lot of money on transport of waste as it no longer needs to be transported to landfills * Incinerations make more space as only 10% of the original waste remains after incineration. * A decrease in landfills would mean that disease harbouring pests such as rats could be reduced * Incineration could also be used as a source of energy which would help preserve the environments and resources * A 250 ton per day incinerator can produce 6.5 megawatts of electricity per day * Gases that are produced in the landfills are removed completely * The waste that is produced in the incineration are totally free of any environmental risk * Incineration plants are extremely expensive * Dioxins are produced in the treatment which could lead to cancer * Complete waste combustion requires 850º C for at least 2 seconds which is very expensive and also produces carbon emissions. * Flue gases are produced which are toxic. This is why chimneys are required to be at least 9 metres above other structures Method 2 – Land fill * The location could be easily monitored * Waste that is going to properly designed landfills can be processed to remove all recyclable and organic material before tipping * Properly managed landfills...
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...Paper is a product of the pulp and paper industry. This commodity although inexpensive as an individual product, is a very important and influential commodity around the world. The disposal and recycling processes of paper has become a critical issue in today’s society. Currently there are three main ways to dispose paper: in landfills, by incineration and by recycling. Landfills can have an impact on air, water and soil quality. Landfills also produce methane which contributes to the greenhouse effect. Incineration does save space compared to landfills but burning the paper waste releases gasses which affect air quality. In today’s society it is generally agreed that the most beneficial and environmentally friendly way to dispose of paper products is to recycle it. For recycling, used paper must go through a process which will sort it, strain the glue and ink from it and finally bleach it so it can be made into new paper. The beginning of the disposal process of paper starts with the consumer disposing of the product in either a trash can or recycling bin. This is where the paper will either travel to landfills, incinerators or recycling facilities. Recycling trucks must collect the contents and transport them to sorting and processing facilities which will recycle the paper to new usable paper. Cities consider themselves environmentally responsible to recycle and dispose of paper and therefore provide garbage and recycling pick up services. This helps create jobs, plus...
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...(2025) and 100% renewable energy (2050), respectively. The technologies include combustion, thermal gasification, anaerobic digestion, fermentation, and transesterification technologies producing electricity, heat, or transport fuel. In the USA, according to the US energy recovery council, there are 87 WTE plants producing 2,700 megawatts that results into 17 million of kwh per year which is enough to meet the needs for power for 2 million households. In the EU incineration is more popular. According to the confederation of European Waste to energy plants (CEWEP) the plants in Europe can supply annually about 13 million inhabitants with electricity and 12 million inhabitants with heat. Waste to energy is produced mainly by biological material and thus the energy produced is mainly biomass energy along with all its pros and cons. In addition significant steps have been taken in recent years to make sure that the portion of non biological material incinerated is harmless to the environment. Therefore, waste to energy incineration is a great way to reduce our dependency on fossil fuel and in addition to reduce CO2 emissions and Land filling. 2. INTRODUCTION...
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...Introduction There’s plenty of facts out there on why recycling is important. The world population is growing, not shrinking, and currently each human being adds significant waste to the planet over his or her lifetime. In Bangladesh, people produce enough trash in one day to fill the entire building. The frustrating thing is, in most developing countries it’s not all too difficult to make a difference. And what a difference we can make. What Exactly Is Recycling? Recycling basically involves turning used materials that are labeled as recyclable over to your local waste facility designated in a disposal container as “recyclable” materials to be taken and reused as material for a new purpose. A recyclable product is turned back into a raw form that can be used to create a new and different product. Not only are natural resources limited, but recycling efforts can significantly reduce additional waste that will not only harm the planet today, but future generations as well. The natural resources on our planet earth are limited so we must make the most to conserve, recycle and reuse whenever possible. What Can I Recycle? What you can recycle depends on your area, not all materials may be recyclable. Check with your local recycle center to find out what you can and cannot recycle. You’ll notice that recyclable products are labeled with numbers from 1 to 7, 1 being the most recyclable, and 7 being the least recyclable. Also check with your city to make sure that you have the...
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...SIERRA CLUB v. MORTON Supreme Court of the United States, 1972. 405 U.S. 727, 92 S. Ct. 1361, 31 L.Ed.2d 636. Facts of the Case • Plaintiff sues Town of Clarkstown, N.Y. for flow control ordinance requiring all nonhazardous material to be deposited in local transfer station; thus infringing on the Commerce Clause of the U.S. Constitution. • The Commerce Clause is a grant of power to Congress that invalidates local laws that impose commercial barriers or discriminates against an article of commerce by reason of its origin or destination out of State. • The Defendant, Town of Clarkstown, N.Y., closed down its landfill and built a transfer station in order to comply with environmental regulations. A local private contractor was hired to build said transfer station, operate it for 5 years, after which the town would buy it for $1. The size of the facility was based on the amount of trash taken to the transfer station each year. The hauler of each waste was required to pay an $81 “tipping fee” for each ton of waste taken to the transfer station; this was done in order to repay the cost of the transfer station to the contractor. In order to ensure that the guaranteed yearly amount of trash was taken to the transfer station the town adopted the flow control ordinance, Local Law 1990, No. 9, which required all nonhazardous solid waste within the town to be deposited at the new transfer station. Local Law 9 also prohibited individual haulers from taking their trash...
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...Recycling of plastics is a serious problem of countries. People do not know its serious effects, so the statistic of recycling of plastics decreased in the recent year and the number of used plastics is increasing quickly. Countries also give some possible solution to solve this problem. According to Marino (2002,p.8) 800,000 tonnes of household collected in Australia from kerbsides each year and the rate of recycling PVC bottles decreased 3% from 1999 to now. Furthermore, the plastic of cars has only 8% is recovered (Association of plastics Manufacturers in Europe,1999). Other statistic is only 2.5% of plastic domestic packaging is recycled in the USA (Landreth and Rebers,1996). Nowadays, many goods are made of plastic, so if it is not recycled, it will be able to affect to people’s health. This problems will become easier if people know how to recycle the plastic and clean up the waste. Besides that, technology has modern machines to solve this problems. Porter (2002,p.12) stated that the electro-thermal deactivation(ETD) can help people avoid noxious from plastic or waste by dumping or incinerate. However, ETD is not cheap. Additionally, other machine is an industrial-scale Cuisinart , it can chop up the plastic or the waste with whirring blades and with the cheap price (Carey and Port, 2002, p.75). In conclusion, it is very necessary and important to change the current situation. the plastic and the waste are noxious, so it needs to be recycled...
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...With the rate of our population growing so is the need for landfills, because too many people do not recycle plastic and rubber. This is also causing landfills to close, because there is no more room for the over growing garbage. Some landfills burn garbage in incinerators which release dangerous gases and dust particles into the air which in turn contribute to global warming and pollute lakes. Burying garbage as most landfills causes both air and water pollution. Recycling of plastic and rubber would benefit the world in many ways. It would reduce the need to create more landfills, reduce water and air pollution, and produces less carbon dioxide. When there is a need to create another landfill it can cause problems for the environment, and the cost of locating a suitable place to create the landfill can be expensive. Landfills take away from our natural resources, pollutes our waters, and the air we breathe. If everyone pitched in and recycled the little things like rubber and plastic it would prevent them from becoming over filled which would lessen the chances of garbage materials would leak into water ways or even pollute soil. With the potential chance of our water ways and soil that we use to plant food in becoming contaminated it makes sense to recycle these items. Recycling plastic can be a significant key to reducing waste in landfills and be a downfall. Recycling plastic is necessary because it helps to avoid their accumulation in landfills. Because plastic has a low...
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...* Recycling everything that you can recycle! This may mean you have to spend an extra five minutes sorting out what is rubbish and what is recyclable. This may mean a different bag to put your recyclables in. * Recycle your unwanted gadgets. There are websites that recycle your mobile-phone and you can even receive money for doing so! * You can recycle your used printer ink cartridges. So many used ink cartridges are disposed of by households and business every day and these are unnecessary additions to landfill waste. They can also leak and cause serious environmental consequences through contamination. * We can recycle almost everything these days: plastics, glass, aluminum, other metals, clothes, newspapers, magazines, cardboard, even your organic peelings from your vegetables can go on a compost heap. * Use online auction sites to sell unwanted items or donate useful items to charity shops and collections. * Buy recycled products. Recycled paper, products that use recycled packaging and plastics. Recycled electrical goods, clothes from charity shops. * Re-use your plastic shopping bags until you can use them no more...and then try and recycle them! Many supermarkets have introduced techniques where you can recycle your plastic bags. * Better still don't use plastic bags, buy a rucksack or other bag to use for your shopping. * Use rechargeable batteries and electronic items. When you are recharging these items do not leave them...
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...“the incineration of knowledge and wisdom” Fahrenheit 451 Kati Hernandez 10/28/14 AP English 12 Period 1 Three Questions 1. When the story starts, what are the forces acting on Montag? 2. Why would Montag read the poem “Dover Beach,” by Matthew Arnold to Mildred and her friends and how is it significant to the novel? 3. Once Montag becomes an insubordinate, why does the government capture an innocent man instead of tracking down Montag? Literary Criticism Ray Bradbury’s Fahrenheit 451 follows the protagonist Guy Montag, a fireman living in a dystopic society where books are illegal and burnt if found. Instead of reading citizens watch copious amounts of television . Conversations with pedestrians are unheard of until Montag meets Clarisse, “seventeen and insane”(Bradbury 7). She asks multiple questions about his life, one question which changes his outlook on his entire life, “Are you happy?”(Bradbury 10). After his conversation with Clarisse, Montag is conflicted with his job, his disposition, and his desire for knowledge and wisdom. Using a variety of literary elements throughout Fahrenheit 451, Ray Bradbury emphasizes that wisdom and knowledge are acquired through experience and critical thinking. Bradbury uses allegory and alliteration to develop the idea that the censorship and the distractions of society leads to the gradual decay of knowledge. While on the subway, Montag remembers his childhood memory of himself sitting on a yellow...
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