Phenol ketone products

Plastic rubber

Current Location： Home > News > Chemical Knowledge > Explore what COD means and understand the key parameters in sewage treatment.

[Chemical Knowledge]：Explore what COD means and understand the key parameters in sewage treatment.

Read： 358 Time：21months ago Source：Transform the World with Simplicity

COD is called Chemical Oxygen Demand, or chemical oxygen demand. COD is an important parameter to measure the biochemical organic matter in water (organic matter easily decomposed by microorganisms), and it is also one of the important indicators to judge the quality of water.

In wastewater treatment, COD is widely used in the control of biochemical reactions. In the process of biochemical reaction, microorganisms will use biochemical organic matter in sewage to grow and reproduce, so as to remove harmful substances in water. However, if there is too much biochemical organic matter in the water, the reaction speed will slow down and the reaction effect will be reduced. At this time, by monitoring the COD value, the level of biochemical reaction can be adjusted in time to achieve the best treatment effect. The content of COD

is closely related to total organic carbon (TOC). Usually, the COD value is several times the TOC, but COD does not represent all the organic matter in the water body. For substances that are difficult to biochemically degrade or inorganic substances, the measured value of COD does not represent the true content of organic matter in the water body.

In addition, it is worth mentioning that there are many methods for COD testing, such as standard Potassium dichromate determination method, rapid COD determination method, ultraviolet COD determination method, etc. Therefore, the determination of COD value also needs to choose the corresponding method according to the actual situation.

To sum up, COD value has an important application in sewage treatment, which can effectively monitor and control the level of the reaction process and ensure the effect of sewage treatment. However, before sewage treatment, it is necessary to carefully analyze the composition of the water body and select the appropriate COD determination method to achieve the purpose of accurate control and efficient treatment.

Previous： The Properties and Application of Sodium Nitrate

Next： What chemical is THF that everyone is talking about?

News Categories