What is the reason for the high COD value of the biological contact oxidation pool?

There are many factors to consider in the biological method of wastewater treatment, and in my experience, the following points should be noted:

1. What is the amount of water? What is the volume of the pool? What are the corresponding indexes such as COD, T-P, NH3-N and so on after adding flour and compound fertilizer? What are the respective WQOs for the existing influent?

2. Is the air-water ratio appropriate? What kind of aeration is used?

3. Have the microorganisms been inoculated? How is the growth going?

4. What is the single service area of the aeration tray?

5. There are many, many more, this is a process of systematic diagnosis and analysis.

Wastewater treatment is a project that requires consideration of many factors. If you don't describe it clearly, others won't be able to give you a satisfactory answer.

How much is the amount of water? Is the pool capacity enough? The main estimate is that your nutrition is not enough, after a few days of suffocation, it is better to continue to gradually enter the water, although the COD will be high in the early stage, but if the pool capacity is fine, it will be fine in the later stage.

How big is your pool? Add so much nutrients?

How much water is designed to intake? The nutrient ratio you add is not right, it is recommended to expose it for a period of time!

Summary. The oxidation pond is a common sewage treatment equipment, the basic principle of which is to oxidize and decompose organic substances through biological action, so as to achieve the purpose of removing COD (chemical oxygen demand) and other organic substances in sewage. If the COD in the effluent of the oxidation pond is elevated, it is caused by:

1.Water quality fluctuations: The treatment effect of the oxidation pond is affected by the influent water quality, if the influent water quality fluctuates greatly, the microorganisms in the oxidation pond may not be able to adapt, resulting in a decrease in the COD removal effect.

2.Excessive load of the oxidation tank: If the load of the oxidation tank is too large, that is, the COD concentration of the influent water is too high or the treatment capacity of the oxidation tank is insufficient, it will cause the microorganisms in the oxidation tank to be unable to decompose organic matter in time, resulting in an increase in COD in the effluent.

3.Inactivation of microorganisms in the oxidation tank: The microorganisms in the oxidation tank are the key to COD removal, if the microorganisms in the oxidation tank are inactivated or the number is insufficient, it will lead to a decrease in the COD removal effect, which in turn will lead to an increase in COD in the effluent.

In response to the above problems, the following measures can be taken:1Strengthen the stability of influent water quality and avoid water quality fluctuations as much as possible.

2.Adjust the COD concentration of the inlet water of the oxidation tank, reasonably control the load of the oxidation tank, and ensure the treatment capacity of the oxidation tank. 3.

Strengthen the management of microorganisms in the oxidation tank to ensure that the number of microorganisms is sufficient and improve the COD removal effect.

The oxidation pond is a common sewage treatment equipment, the basic principle of which is to oxidize and decompose organic substances through biological action, so as to achieve the purpose of removing COD (chemical oxygen demand) and other organic substances in sewage. If the COD in the effluent of the oxidation tank is elevated, it is caused by the following reasons:1

Water quality fluctuations: If the influent water quality fluctuates greatly, the microorganisms in the oxidation tank may not be able to adapt, resulting in a decrease in COD removal effect. 2.

Excessive load of the oxidation tank: If the load of the oxidation tank is too large, that is, the COD concentration of the influent water is too high or the treatment capacity of the oxidation tank is insufficient, it will cause the microorganisms in the oxidation tank to be unable to decompose organic matter in time, resulting in an increase in COD in the effluent. 3.

Inactivation of microorganisms in the oxidation tank: The microorganisms in the oxidation tank are the key to COD removal, if the microorganisms in the oxidation tank are inactivated or the number is insufficient, it will lead to a decrease in the COD removal effect, which in turn will lead to an increase in COD in the effluent. In response to the above problems, the following measures can be taken:

1.Strengthen the stability of influent water quality and avoid water quality fluctuations as much as possible. 2.

Adjust the COD concentration of the influent water of the oxidation tank, reasonably control the rotten grinding load of the oxidation tank, and ensure the treatment capacity of the oxidation tank. 3.Strengthen the microbial management in the oxidation tank to ensure that the number of microbiotic components is sufficient and improve the COD removal effect.

The oxidation tank is a common sewage treatment equipment, the basic principle of which is to oxidize and decompose organic matter through biological action, so as to achieve the purpose of removing COD (chemical aerobic demand) and other organic matter in sewage. If the COD in the effluent of the oxidation pond is elevated, it is caused by the following reasons:

Hello dear, I am glad to answer for you: high sewage COD (chemical oxygen demand) may be caused by excessive residence time in anoxic ponds, but it is not the only reason. The anoxic pond is an important part of the sewage treatment, and its function is to allow the anaerobic microorganisms to decompose the organic matter in the sewage and convert it into decomposable substances.

If the residence time in the hypoxic pond is too long, it will lead to an overabundance of microorganisms, which will slow down the decomposition of organic matter, resulting in an increase in COD values. In addition to the long residence time of the anoxic pond, there are other reasons that may lead to high COD in sewage, such as:1

There are a large number of organic substances in sewage that are difficult to decompose, such as oil, protein, etc. 2.Failure of water treatment equipment of land tankers, such as aerators not working or working poorly, insufficient sludge backflow, etc.

3.Improper design or operation of sewage treatment equipment, such as excessive or small flow rate, uneven mixing of reactors, etc. 4.

The presence of toxic substances in sewage treatment equipment, such as heavy metals, organic matter, etc. To solve the problem of high sewage COD, it is necessary to comprehensively analyze all aspects of the sewage treatment system, find out the problem, and take targeted measures.