Bod of highly polluted water is

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August undefined, 2024

Web39 views, 1 likes, 0 loves, 2 comments, 1 shares, Facebook Watch Videos from Pointe FM 99.1: POINTE FM MID-MORNING NEWS WebBOD (Biochemical Oxygen Demand) reffers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The …

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WebIn water with a BOD level of 6-9 ppm, the water is considered somewhat polluted because there is usually organic matter present and bacteria are decomposing this waste. At BOD … WebJun 24, 2024 · Clean water would have BOD value of 5 ppm whereas highly polluted could have BOD value of 17 ppm or more. Normally rain water has pH of 6 due to H + ion formed by reaction of rain water with carbon dioxide in the atmosphere. When the pH of the rain water drops below 5.6, it is called acid rain. Q14. bird sightings hampshire

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WebThe correct option is C. A highly polluted system due to excess of nutrients. Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms in a water body to break down organic materials present in a given water sample at certain temperature over a specific time period. It is widely used as an … WebMar 22, 2024 · Water bodies can be polluted by a wide variety of substances, including pathogenic microorganisms, putrescible organic waste, fertilizers and plant nutrients, toxic chemicals, sediments, heat, … WebBOD or Biochemical Oxygen Demand (Also known as Biological Oxygen Demand), is the amount of oxygen needed by aerobic organisms to break down the organic substances in sewage water. Polluted water will have higher BOD. For instance, if BOD of water is 1-2, the water quality is very good. dana williamson newsom

Water samples with BOD values of 4 ppm and 18 ppm , …

WebHighly polluted: 500 – 3,000 mg/L; Extremely polluted: 3,000 – 15,000 mg/L; COD, the chemical demand for oxygen a source of water has, is the amount of oxygen required to break down organic substances chemically and convert them to CO 2 and H 2 O. It is also expressed in mgO 2 /L, and the higher the COD, the more polluted the water is ... WebBOD is the biological method used for the measurement of the total amount of dissolved oxygen (DO) used by microbes in the biological process of metabolizing organic molecules present in water. The total amount of oxygen gas present in … dana wimpfheimer photographyWebJul 4, 2024 · The correct option is A> 16 ppm. The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called … bird sightings flamborough head

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Bod of highly polluted water is

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WebSep 5, 2024 · BOD is the amount of oxygen dissolved in water, which is required by the micro organisms to oxidize inorganic and organic compounds. More amount of BOD means more polluted water. If the BOD is more than 17 ppm it is said to polluted. So, the decreasing order of content of polluted water is C>A>B>D. WebApr 6, 2024 · Biochemical Oxygen Demand or alternatively termed as Biological Oxygen Demand (BOD) is the amount of oxygen needed or demanded by aerobic microorganisms to break down the organic matter present in a certain sample of water at a specific temperature and over a given time period.

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WebApr 7, 2024 · The BOD value of * Moderately clean water is 3-5 ppm, whereas somewhat polluted water has a BOD value of 6-9 ppm. * The BOD value of clean water would be less than or equal to 5 ppm. Therefore, the correct answer is option (b). Note: The BOD value increases as the amount of pollution increases in a water body. The water that we … WebLater, UNEP (2001) reported that since 1994, Bagmati River has become highly polluted with high BOD and low DO values due to high concentration of domestic and industrial discharges. In the Bagmati River, the BOD data from 1988 to 2003 from the different sections of the river revealed rise of BOD at a rate of 1.8 mg/L per year ( Kannel et al ...

WebNov 24, 2024 · 16. BOD indicates a amount of pollution of water bodies. Lower BOD indicates the water is a good quality for aquatic life or little aerobic acitivity whereas the higher BOD indicates the water is highly polluted. When BOD is higher , then DO becomes lower . so, aquatic organisms are unable to survive at normal rate , it becomes … WebSep 13, 2024 · Biological Oxygen Demand (BOD) is one of the most common measures of pollutant organic material in water. BOD indicates the amount of putrescible organic …

WebIf BOD level of water in reservoir is less than 5 ppm it is highly polluted . Reason High biological oxygen demand means low activity of bacteria in water. Medium View solution … WebPlease be patient as the PDF generation may take upto a minute. Print ...

WebMar 6, 2012 · Oxygen is measured in its dissolved form as dissolved oxygen (DO). If more oxygen is consumed than is produced, dissolved oxygen levels decline and some sensitive animals may move away, weaken, or die. DO levels fluctuate seasonally and over a 24-hour period. They vary with water temperature and altitude.

WebBOD values are usually reported in either ppm values or in mg/L values. Unpolluted rivers typically have a BOD below 1 mg/L. Moderately polluted rivers vary between 2 to 8 mg/L. Untreated sewage averages between 200 and 600 mg/L while efficiently treated municipal sewage would be 20 mg/L or less. Chemical Oxygen Demand dana wilson friend of maggie murdaughWebMay 10, 2014 · BOD is reported either in ppm or mg/L values. Very less or unpolluted water bodies can have BOD anywhere below 1mg/L. But in case of polluted water bodies, due the large amounts of organic matter presence, oxygen required is also high. Thus BOD of polluted bodies can be anywhere from 80 and more. dana wilson actress wikipediaWebMar 22, 2024 · Water bodies can be polluted by a wide variety of substances, including pathogenic microorganisms, putrescible organic waste, fertilizers and plant nutrients, toxic chemicals, sediments, heat, petroleum (oil), and radioactive substances. Several types of … toxic waste, chemical waste material capable of causing death or injury to life. W… plastic pollution, accumulation in the environment of synthetic plastic products to … dana wilson home inspection