What is COD in short?

Chemical Oxygen Demand (COD) is a test that measures the amount of oxygen required to chemically oxidize the organic material and inorganic nutrients, such as Ammonia or Nitrate, present in water.

What is COD in simple words?

Chemical oxygen demand, or COD, is the measure of the capacity of water to consume oxygen during the decomposition of organic matter in the water. In other words, it's the amount of oxygen that's needed to oxidise the organic matter present in a quantity of water.

What is BOD and COD in simple words?

Biochemical oxygen demand (BOD) is the amount of oxygen microorganisms require to break down organic materials. In contrast, chemical oxygen demand (COD) is the amount of oxygen required to break down the organic material via oxidation. Read: Biological Oxygen Demand. Let us look at the differences between BOD and COD.

What does COD stand for industry?

Cash on delivery, or collect on delivery (COD), is a method of collecting payment that requires customers to pay for goods at the time of delivery. Companies that manufacture and distribute goods deliver products to potentially thousands of customers every day.

What is COD of water?

COD is a measure of the oxygen equivalent of the organic matter in a water sample that is susceptible to oxidation by a strong chemical oxidant. COD is widely used as a measure of the susceptibility to oxidation of the organic and inorganic materials present in water bodies and in the municipal and industrial wastes.

How to Use Stim Shots PROPERLY in CODM

Why measure COD in water?

Why is the measurement of chemical oxygen demand (COD) important? For most users, COD is important as an indicator of how much oxygen will be required to treat the incoming waste streams, which in turn drives the use of aeration equipment and, ultimately, electricity.

What is COD a measure of in water?

Chemical Oxygen Demand (COD) is a test that measures the amount of oxygen required to chemically oxidize the organic material and inorganic nutrients, such as Ammonia or Nitrate, present in water.

What is the right meaning of COD?

collecting the charges upon delivery. “mail a package C.O.D.” synonyms: COD, cash on delivery.

What COD only means?

The meaning of cash on delivery

Cash on delivery is a service offered by many companies where the customer does not need to pay for the goods until they are delivered. This means that once the shipment arrives, you have to pay for it before taking it.

What does COD stand for in supply chain?

COD is an acronym used in logistics, which means 'Change of Destination'.

What does high COD in water mean?

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.

What causes high COD in wastewater?

Sources: COD increases as the concentration of organic material increases. It also increases if inorganic compounds susceptible to oxidation by the oxidant (typically dichromate) are present. Water with high COD typically contains high levels of decaying plant matter, human waste, or industrial effluent.

How do you reduce COD in wastewater?

One way to reduce COD in water is to use coagulants and flocculants to bind sludge together. Once they are bound into big enough masses that they can be easily filtered out and deposited into a sedimentation tank for removal. This method does however rely on the use of chemicals, and requires high reoccurring cost.

What does COD mean in behavior?

Effectively Treat Clients with Co- Occurring Disorders (COD)

What does COD mean in crime?

A Certificate of Disposition is an official court document affixed with the Court Seal that says what happened in a criminal case. It says the crime you were charged with, what you were convicted of, the date you were convicted and the sentence you got.

What does COD mean medical?

COD is defined as co-occurring substance related and mental disorders. Patients said to have co-occurring disorders have one or more substance-related disorders as well as one or more mental disorders.

What does COD stand for medical?

COD: Co-Occurring Disorder. Clients said to have COD have one or more substance-related disorders as well as one or more mental disorders.

How do you calculate COD?

COD = (C/FW)·(RMO)·32.

How much COD should be in drinking water?

Chemical Oxygen Demand (COD)*** mg/l Not more than 120 mg/l depending on receiving water or type of industry under consideration of PCC but not exceeding 400 mg/l.

How is COD determined?

A typical determination of the COD is to introduce an excess of the dichromate ion. After the reaction is completed the excess amount of dichromate is measured by titration with ferrous ammonium sulfate. COD is expressed in milligrams per liter (mg/L), which indicates the mass of oxygen consumed per liter of solution.

Is High COD good or bad?

The higher the COD value, the more serious the pollution of organic matter by water. The most common application of COD is in quantifying the amount of oxidizable pollutants found in surface water (e.g., lakes and rivers) or wastewater (Davidson, 2001; Sara and Goncaloglu, 2008).

What factors affect COD in water?

The rate of oxygen consumption in a stream is affected by a number of variables: temperature, pH, the presence of certain kinds of microorganisms, and the type of organic and inorganic material in the water.

Does aeration remove COD?

Aeration should help reduce the COD in 2 ways. First it may evaporate some volatiles like hexane. Second it will add oxygen to the water speeding up any biological oxidation of the less volatile organics by the bacteria (microbial growth).

How can COD be reduced?

The COD reduction is made by oxidation in an acid medium of a large part of the oxidizable substances dissolved in the water to be treated. After the treatment, the reduction of COD can be measured by analysis of the acidified medium is more favorable to continued treatment with a much lower reagent consumption.