MOD. Manner of death: natural, homicide, suicide, accident, undetermined. COD. Cause of death: injuries/illnesses such as strangulation, drowning, etc. TOD.
What is COD BOD and Tod?
The most popular sum parameter in waste water analysis are the BOD (biochemical oxygen demand), COD (chemical oxygen demand), TOD (total oxygen demand) and TOC (total organic carbon). The TOC reflects the organic pollution on the basis of a direct carbon determination.
What does COD stand for in wastewater?
chemical oxygen demand
COD (chemical oxygen demand) COD is the most popular alternative test to BOD for establishing the concentration of organic matter in wastewater samples.
Who determines the COD and MoD?
In general, the pathologists take 3 to 4 days to ascertain MoD and CoD from autopsy findings and to release initial autopsy report.
What is Tod in wastewater treatment?
Total Oxygen Demand (TOD) – An Alternative Parameter For Real-Time Monitoring Of Wastewater Organics. By Dr. Wolfgang Genthe and Mike Pliner. Today, due to the multitude of organics, the organic contamination of wastewater cannot be defined with passable analytical effort.
Is Tod greater than COD?
∴ TOD > COD > BOD
Other Important points: COD is also known as Di-chromate demand. Get proficient with the Environmental Engineering concepts with detailed lessons on the topic Quality and Characteristics of Sewage among many others.
What is the purpose of COD?
Chemical oxygen demand (COD) is the amount of dissolved oxygen that must be present in water to oxidize chemical organic materials, like petroleum. COD is used to gauge the short-term impact wastewater effluents will have on the oxygen levels of receiving waters.
What is COD in simple words?
COD is the oxygen demand that is consumed by both inorganic and organic matter present in the wastewater sample. The chemical oxygen demand is expressed as the mass of oxygen consumed over the volume of the solution. Its SI unit is milligrams per liter (mg/l).
What does the abbreviation COD stand for?
COD. An abbreviation for “cash on delivery” or “collect on delivery.”
What if COD is high in water?
When the COD levels are higher, there is a greater demand for oxygen. This means that there is likely more oxidizable organic material in water with high COD levels. This also means that there are reduced Dissolved Oxygen (DO) concentrations in wastewater with high COD levels.
What are the 4 categories of death?
The classifications are natural, accident, suicide, homicide, undetermined, and pending. Only medical examiner’s and coroners may use all of the manners of death.
What is the difference between a coroner and a medical examiner?
Coroners are elected lay people who often do not have professional training, whereas medical examiners are appointed and have board-certification in a medical specialty. The coroner system has advantages, but they are heavily outweighed by its disadvantages.
What are the three modes of death?
Mode of Death
- Coma –death from failure of functioning of brain.
- Syncope –death from failure of functioning of heart.
- Asphyxia –death from failure of functioning of lungs.
How is COD measured?
COD is measured via a laboratory assay in which a sample is incubated with a strong chemical oxidant for a specified time interval and at constant temperature (usually 2 h at 150°C). The most commonly used oxidant is potassium dichromate, which is used in combination with boiling sulphuric acid.
How is COD calculated?
There is a formula for calculating COD. Consider the formula for COD calculation: (a – b) X C X 8,000 / the volume of the sample in mL. Let “a” represent the titrant used for your sample expressed in mL. Let “b” represent the titrant used for your blank sample in mL.
Is TOC greater than COD?
It is obvious that if TOC is high then, COD is also high, but the reverse relation may not be true ie, If COD is high it does not mean that TOC will be high. COD may be high due to presence of inorganic reducing substances and in that case TOC may be less.
Which is higher COD or ThOD?
Explanation: ThOD mostly greater than COD.
What should be the COD of drinking water?
According to standards of Central Pollution Control Board, permissible value of BOD is 30 mg/l and COD is 250 mg/l. Hope this helps, it mentions standards for India relating to different uses.
What is the basis for the COD test?
The basis for the COD test is that nearly all organic compounds can be fully oxidized to carbon dioxide with a strong oxidizing agent under acidic conditions. The amount of oxidized agent need to completely oxidize the organic material is then compared to the equivalent amount of oxygen.
What is COD in accounting?
cash on delivery (C.O.D.), also called collect on delivery, a common business term indicating that goods must be paid for at the time of delivery. The payment is usually due in cash but may be made by check if acceptable to the seller. Related Topics: payment delivery mail delivery.
Why is COD important in wastewater treatment?
In wastewater treatment, the Chemical Oxygen Demand (COD) is an important measurement for the amount of oxygen that is required to break down pollutants (organic substances) in water. The chemical oxygen demand can be measured using different methods, direct or indirect.
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