Influence of Heat Treatment on Hardness and Corrosion Resistance of Commercial Aluminium Mayeedul Islam 1‚*‚ S. M. Najmul Hoque2‚ M. Abdullah Al Mahmood2‚ A. A. Shisir 2 ABSTRACT Aluminium and their alloys are widely used as construction materials from house hold appliances to air-craft parts. The commercially pure aluminium has merely low corrosion resistance and hardness compare to aluminium alloy. In this study an attempt has been made to study the influence of heat treatment on the properties
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known as Bombay. Was recently a headliner for high increase in water contamination in due to mismanagement of BMC. BMC- Bombay Municipal corporation‚ is a corporation of the water and sewage systems dealing within the city. Water crisis in Mumbai is beyond unbearable‚ 19% of water consumed is contaminated with sewage water‚ E. Coli‚ sand particles‚ and other harmful bacterial content besides other foreign particles. "According to BMC’S own sample test results for 2012-2013‚ 60‚726 out of samples
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a man made structure. Effluent is defined by the United States Environmental Protection Agency as “wastewater - treated or untreated - that flows out of a treatment plant‚ sewer‚ or industrial outfall. Generally refers to wastes discharged into surface waters”. The Compact Oxford English Dictionary defines effluent as “liquid waste or sewage discharged into a river or the sea”. Sources of Industrial Effluents Iron and steel industry : Contamination of waste stream includes chemicals like
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government‚ invest in new technology (membrane biological reactors)? Industry: → increased demand for water and water treatment‚ trend expected to continue → market projections reaching $348 billion → demand growing for safe drinking water in developing countries → sustainability challenges and advancements in environmental regulation result in growth of demand for higher water treatment standards → 2008‚ 1.2 billion without drinking water‚ 2.4 billion not connected to wastewater systems → 40% projected
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polluted rainwater‚ making about 80% of the river’s total flow. However‚ in many of the older regions of Toronto‚ sewers that carry both the sanitary sewage from homes (i.e. bathroom and kitchen waste water) and the rainwater from storms‚ flow through the same pipe. The danger here is that these pipes overflow during heavy storms and spill raw sewage right into the Don River. High levels of toxic chemicals such as phosphorus‚ nitrates‚ E. Coli‚ and heavy metals‚ all can be measured in the Don River
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FOREST A forest‚ also referred to as a wood or the woods‚ is an area with a high density of trees. As with cities‚ depending on various cultural definitions‚ what is considered a forest may vary significantly in size and have different classifications according to how and of what the forest is compose. These plant communities cover approximately 9.4 percent of the Earth’s surface (or 30 percent of total land area)‚ though they once covered much more (about 50 percent of total land area)‚ in many
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Residential Treatment Centers for Teens: Effective – Yes I have worked at Aspen Ranch‚ a Residential Treatment Center for at risk teens‚ for four years. I have held many positions including direct care staff and Shift Manager. I am going to prove that residential treatment centers for adolescents are‚ in fact‚ effective. I will be starting with a brief history of RTC’s (Residential Treatment Centers) and then be moving forward with facts and opinions on the matter to prove this point. History
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There is just one city‚ Islamabad‚ that is a city of natural streams‚ flowing out of perennial and seasonal springs of the Margalla hills. Just stepping onto the trails from any part of the hills‚ one can notice pure water gurgling over the boulders and rough stones. These beautiful streams in hundreds have sustained wildlife for thousands of years. Those of us who are fortunate to have seen Islamabad in the early years‚ myself in the early 1970s‚ have a good memory of natural streams full of clear
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Drainage: • The term “drainage” describes the river system of an area. • The area drained by a single river system is called a “drainage basin” or river basin. • Any higher ground‚ such as mountain or upland separates two adjoining drainage basins. Such upland is known as a water divide or a watershed. • Depending upon the relief‚ geological structure and climatic conditions of the area‚ the streams form different patterns. Drainage Pattern: • Drainage of an area is concerned with the study
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WBI Instructor Resource Series Managing the Implementation of Development Projects Note: The purpose of this resource kit is to provide a set of learning materials covering a range of topics related to project implementation. Coverage is neither comprehensive nor exhaustive; nor do the materials reflect the requirements of any specific agency. Because these materials have been designed specifically for instructional purposes‚ in some instances the content has been simplified or abridged to facilitate
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