Asked By: Jake Green Date: created: Jan 21 2021
Why is cod high
Answered By: Louis Smith Date: created: Jan 24 2021
IMPORTANCE OF COD FOR WASTEWATER
Higher COD levels mean a greater amount of oxidizable organic material in the sample, which will reduce dissolved oxygen (DO) levels. A reduction in DO can lead to anaerobic conditions, which is deleterious to higher aquatic life forms.
Asked By: Alan Williams Date: created: Apr 03 2021
What does the ratio of BOD to COD indicate
Answered By: Wallace Williams Date: created: Apr 05 2021
If the BOD/COD ratio for untreated wastewater is 0.5 or greater, the waste is considered to be easily treatable by biological means. If the ratio is below about 0.3, either the waste may have some toxic components or acclimated microoorganisms may be required in its stabilization.
Asked By: Howard Howard Date: created: Sep 14 2021
Can COD be lower than bod
Answered By: Herbert Adams Date: created: Sep 17 2021
But because it also measures inorganic oxygen users, COD test results will always be higher than BOD results for the same sample. An some cases, a stable ratio can be observed between BOD and COD results at the same site. For instance, BOD may typically be 60% lower than COD results.
Asked By: Christian Rodriguez Date: created: Dec 13 2021
What does a high BOD mean
Answered By: Michael Barnes Date: created: Dec 15 2021
BOD indicates the amount of putrescible organic matter present in water. Therefore, a low BOD is an indicator of good quality water, while a high BOD indicates polluted water. Dissolved oxygen (DO) is consumed by bacteria when large amounts of organic matter from sewage or other discharges are present in the water.
Asked By: Francis Wood Date: created: Nov 07 2021
How do you reduce COD in wastewater
Answered By: William Hill Date: created: Nov 08 2021
Activated carbon will absorb organic substances, ozone or chlorine substances remaining on the processing results. So safe effluent to be discharged into the environment. Filtration using activated carbon is also commonly used in water treatment processes to remove odors, and reduce the chemicals in the water.9 Dec 2015
Asked By: Steven Roberts Date: created: Nov 04 2020
What is the COD value of drinking water
Answered By: Wyatt Sanders Date: created: Nov 06 2020
For drinking water standard: as per IS 10500 – there is no standard for Bod or cod mentioned but ideally it should be zero/ negligible. BOD up to 5 ppm is generally considered clean. As per WHO guideline for drinking water: For DO there is no health based guideline value is recommended.
Asked By: Nathaniel Bryant Date: created: Sep 16 2021
What is a good BOD level
Answered By: Walter Phillips Date: created: Sep 16 2021
A BOD level of 1-2 ppm is considered very good. There will not be much organic waste present in the water supply. A water supply with a BOD level of 3-5 ppm is considered moderately clean.
Asked By: Jordan Butler Date: created: Sep 05 2021
How COD is measured
Answered By: Cameron Gonzales Date: created: Sep 08 2021
In environmental chemistry, the chemical oxygen demand (COD) is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed in mass of oxygen consumed over volume of solution which in SI units is milligrams per litre (mg/L).
Asked By: Nathan Walker Date: created: Nov 18 2021
How do you test COD in wastewater
Answered By: Richard Cox Date: created: Nov 20 2021
The COD test uses a chemical (potassium dichromate in a 50% sulfuric acid solution) that “oxidizes” both organic (predominate) and inorganic substances in a wastewater sample, which results in a higher COD concentration than BOD concentration for the same wastewater sample since only organic compounds are consumed
Asked By: Christopher Watson Date: created: Apr 15 2021
What is COD in wastewater
Answered By: Andrew Collins Date: created: Apr 18 2021
The chemical oxygen demand (COD) is a measure of water and wastewater quality. The COD test is often used to monitor water treatment plant efficiency. The COD is the amount of oxygen consumed to chemically oxidize organic water contaminants to inorganic end products.
Asked By: Benjamin Young Date: created: Jul 03 2021
What is the BOD value of pure water
Answered By: Ian Martinez Date: created: Jul 03 2021
A water supply with a BOD level of 3-5 ppm is considered moderately clean. In 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.
Asked By: Alexander Sanders Date: created: Jan 28 2022
Which is better BOD or COD
Answered By: Miles Jackson Date: created: Jan 29 2022
COD is the amount of oxygen required to chemically breakdown the pollutants whereas BOD is the amount of oxygen required to do this biologically through micro-organisms. There is a strong correlation between COD and BOD, however COD analysis is a much faster and more accurate method.19 Jun 2015
Asked By: Morgan Coleman Date: created: Sep 28 2021
What does BOD mean in business
Answered By: Brian Hill Date: created: Sep 29 2021
Business Operating Division. BOD. Bill of Distributions (supply chain management) BOD. Backup on Demand (data management)
Asked By: Harry White Date: created: Oct 02 2021
What is BOD and COD in water
Answered By: Roger Martin Date: created: Oct 03 2021
COD or Chemical Oxygen Demand is the total measurement of all chemicals (organics & in-organics) in the water / waste water; BOD is a measure of, the amount of oxygen that require for the bacteria to degrade the organic components present in water / waste water.
Asked By: Alejandro Sanders Date: created: Aug 13 2021
Is there oxygen in water
Answered By: Colin Cook Date: created: Aug 14 2021
Although water molecules contain an oxygen atom, this oxygen is not what is needed by aquatic organisms living in natural waters. A small amount of oxygen, up to about ten molecules of oxygen per million of water, is actually dissolved in water.
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