Will there be a situation where the nitrogen value in the wastewater is higher than the total nitrog

The removal methods of organic nitrogen from total nitrogen in wastewater are as follows:

The sewage is first treated by the sequential batch biofilm method, and the macromolecular organic nitrogen is decomposed into small molecule organic nitrogen under the environment of anaerobic, anoxic and aerobic conditions, and then the small molecule organic nitrogen is removed by microbial degradation, and ammonia nitrogen and nitrate nitrogen are removed through the short-range nitrification denitrification and anaerobic ammonia oxidation of microorganisms.

Then after coagulation-microfiltration treatment, by adding coagulant, bacteria, SS and other nitrogen-containing substances are precipitated and removed, and then through the filtration of hollow fiber microfiltration membrane to remove humic acid, fulvic acid and other refractory macromolecular organic nitrogen, reduce the total amount of organic nitrogen in sewage.

Hello landlord:

Let me answer the question of which nitrogen in the total nitrogen exceeds the standard (ammonia nitrogen, organic nitrogen, nitrate nitrogen, nitrous nitrogen) if the total nitrogen exceeds the standard.

Therefore, there is no case where ammonia nitrogen is higher than total nitrogen, and even if there is, it is an inaccurate result due to detection.

Xinerte Biotech provides you with:

Total nitrogen includes the total amount of inorganic and organic nitrogen: inorganic nitrogen such as nitrate, nitros, and ammonia, as well as organic nitrogen such as proteins, amino acids, and organic amines. Ammonia nitrogen is one of the components of total nitrogen, and the qualitative analysis of total nitrogen is higher than that of ammonia nitrogen, but each water quality is different and cannot be quantitatively analyzed.

No! If the nitrogen is higher than the total nitrogen value, it must be a mistake.

The main meaning of the total nitrogen content of sewage is that the total nitrogen content of the sewage as a whole is relatively high, which exceeds the scope and requirements of the standard, so at this time, it must be treated reasonably by professional technology and methods to achieve a more environmentally friendly degree.

When the influent water is exceeded, the COD, total nitrogen, total phosphorus and SS of the raw water may inexplicably increase, and the SS and total phosphorus can be removed by coagulation and precipitation. COD excess is based on the excessive content of these organic matter, the dissolved substances or colloidal substances in the wastewater can be removed by physical and chemical actions, and the biological treatment method can also be used to convert the organic pollutants and inorganic microbial nutrients in the wastewater into stable and harmless substances through microbial metabolism.

3. Solutions for exceeding the total nitrogen standard in sewage:

1.Ammonia nitrogen removal The use of microbial nitrification and denitrification to remove ammonia nitrogen in wastewater is based on the principle of converting ammonia nitrogen into nitrogen through the combined action of the bio-promoting nitrifying bacterium MicroBoost-N and the bio-promoting total nitrogen removal bacterium MicroBoost-DEN, so as to achieve the purpose of denitrification. First of all.

2.Removal of organic nitrogen Biological method, nitrogen compounds can be converted to nitrogen under biological action: Chemical method, nitrogen compounds are directly converted from organic nitrogen and ammonia nitrogen to nitrogen through oxidation:

3.Removal of nitrate nitrogen Nitrate nitrogen mainly refers to nitrate ions, and currently uses ion exchange, membrane permeation, adsorption and biological denitrification.

Well, there will also be a total nitrogen in the sewage, but this is also an indicator, through which it can be used to feedback the pollution of this sewage.

Total nitrogen includes ammonia nitrogen, organic nitrogen, nitrite nitrogen, nitrate nitrogen. There are two possible causes of high total nitrogen in sewage:

1.The effluent has high ammonia nitrogen, resulting in high total nitrogen.

Cause: There was a problem with the aerobic nitrification system, resulting in high ammonia nitrogen.

Solution: Control the support of dissolved oxygen, pH and other parameters to enhance the nitrification system.

2.The ammonia nitrogen in the effluent meets the standard, while the total nitrogen is high.

Reason: Incomplete denitrification reaction in anoxic pond, reflux ratio, sludge age, suspended solids and other factorsSolution: Add Zhanqing denitrification complex bacillus, carbon source, etc., or use IDN-BMP total nitrogen treatment enrichment integrated equipment.

Possible reasons why ammonia nitrogen analysis results are higher than total nitrogen during water quality testing.

There are several possible reasons why ammonia nitrogen analysis results are higher than total nitrogen during water quality testing

1. Error of sample introduction Because the nitrogen compounds in the water are constantly changing, the samples that are sent back to the laboratory for experimental analysis after collection, their storage time, storage location, light conditions, etc., and even the order of sampling by analysts, etc., will bring different errors to the experimental analysis of ammonia nitrogen and total nitrogen.

2. Errors introduced by the experimental environment There are toilets or ammonia storage around the laboratory, so that the air in the laboratory often contains ammonia and ammonium salts to varying degrees, and ammonia and ammonium salts are very soluble in water, so that the experimental water also contains ammonium ions to varying degrees. It can be said that it is difficult to achieve ammonia-free operation in the whole experimental analysis process, and this environment certainly brings errors that are difficult to completely deduct with the blanks of the whole program for the analysis of ammonia nitrogen and total nitrogen, especially for the positive error of the experimental test of ammonia nitrogen, which is more direct and larger.

3. Errors introduced by experimental conditions The analysis of ammonia nitrogen usually adopts the more classical Nessler's reagent photometry, although the color development requires an alkaline environment, but there is no long pretreatment process, and the results can be calculated after direct color development and determination. In general, there is no large error in the experimental conditions. The analysis of total nitrogen should undergo 30min of heating and pressurization treatment under alkaline conditions, so that all the different forms and states of nitrogen contained in the sample are converted into nitrate ions, and the pH value of the sample is adjusted with dilute hydrochloric acid, and then colorimetric determination is carried out on a UV spectrophotometer.

This is a very long pretreatment process compared to the determination of ammonia nitrogen, and the most important thing is the efficiency of the pretreatment, because it is difficult to achieve 100% efficiency of any pretreatment, that is, the conversion of nitrogen compounds in the sample after pretreatment cannot be 100%, and there must be errors.

4. Error of sample turbidity introduction The turbidity influence that can be eliminated by the pretreatment of total nitrogen analysis cannot be eliminated in the analysis of ammonia nitrogen, and different kinds of cuvettes are commonly used in colorimetry, and these influencing factors add up to bring differences to the final results.

5. Errors introduced by different analystsTherefore, I think the key points should be as follows: (1) The analysis time of total nitrogen and ammonia nitrogen should be consistent; (2) The measurement of total nitrogen is to eliminate the interference of turbidity.

Summary. Low ammonia nitrogen and high TN mean that nitrate accounts for most of the effluent TN, and the nitrification effect is not good. There could be two reasons:

1) The aeration at the aerobic end is too high, and the oxygen flows back to the anoxic section with the mixture as an electron acceptor, which hinders the reduction of nitrate, so the total nitrogen is high: 2) The reflux ratio is not suitable, generally 100% of the sludge reflux ratio means that 50% of the nitrate nitrogen is denitrified; The domestic control ratio of the mixed liquid reflux to the anoxic section is about 100%-300%, please consider and adjust it according to the energy consumption of your plant; 3) The carbon source of the influent water is insufficient and the ammonia nitrogen is too low, which can be understood as the oxidation process of autotrophic bacteria is long enough under the condition of good COD removal, and the concentration of COD inlet water is low, which can cause the lack of denitrification carbon source, the COD load in the aerobic section is low, and the ammonia nitrogen oxidation process is prolonged accordingly.

The ammonia nitrogen in the effluent of the wastewater treatment plant is too low, but the total nitrogen is high, which may be the reason.

Low ammonia nitrogen and high TN mean that nitrate accounts for most of the effluent TN, and the nitrification effect is not good. There may be two reasons: 1) The aeration at the aerobic end is too high, and the oxygen flows back to the anoxic section with the mixture as an electron acceptor, which hinders the reduction of nitrate, so the total nitrogen is high

2) The reflux ratio is not suitable, generally 100% sludge reflux ratio means 50% nitrate nitrogen for denitrification; The domestic control ratio of the slag difference mixture to the anoxic section is about 100%-300%, please consider and adjust according to the energy consumption of your plant; 3) The influent carbon source is insufficient and the ammonia nitrogen is too low, which can be understood as the oxidation process of autotrophic bacteria is long enough under the good condition of COD removal and low COD inlet concentration, which can cause the lack of denitrification carbon source, and the aerobic section such as cherry bark COD load is low, and the ammonia nitrogen oxidation process is prolonged accordingly.

The ammonia nitrogen reached the standard, and the total nitrogen exceeded the standard.

This may be the reason for the low ammonia nitrogen in the effluent, but the total nitrogen is high because there may be two things:1The concentration of dissolved oxygen in the reaction pool is very high, and there is no denitrification stage, and all the ammonia nitrogen in the simple cavity is oxygenated into nitrate nitrogen, and the total denitrification efficiency is not high. 2.

Although the reaction tank has a denitrification section, the carbon:nitrogen ratio of the incoming water is less than 5:1, the amount of nitrogen is high, and there is not enough carbon during denitrification, so the total nitrogen will also be very high.

How to fix it. Kiss increases the pretreatment of hydrolytic acidification. 2. If the hydrolysis acidification cannot break the ring, add advanced oxidation pretreatment.

Please explain the white point, whether to add carbon source or detonation gas, or to increase reflux.

Thank you. At this time, we need to test the content of each nitrogen one by one to see which kind of Kaipian spring nitrogen content exceeds the standard, and then monitor the resistance for corresponding treatment and improvement. If the total nitrogen content in the sewage exceeds the standard, no matter what kind of nitrogen content is too high, we only need to improve the denitrification process cycle, that is to say, nitrification should be in place, and denitrification should also be prepared in place.

Summary. Hello dear, analysis of the reasons why ammonia nitrogen in sewage is higher than total nitrogen.

The initial contamination of nitrogen-containing organic matter in domestic sewage is the main content of ammonia nitrogen in water. The ammonia nitrogen factor in these sewage creates conditions for the growth and reproduction of microorganisms, and it is easy to form eutrophication on the basis of the rapid growth of plankton. In addition, under the action of microorganisms, the ammonia nitrogen in the sewage will further decompose and eventually form nitrate nitrogen; In this reaction, once the reaction process is insufficient, it will cause the production of a large amount of nitrite nitrogen, which will form the carcinogen nitrosamine when it binds to proteins.

Excuse me, why is the ammonia nitrogen measured in domestic sewage higher than the total nitrogen?

Hello, the ammonia nitrogen in the sewage is higher than the total nitrogen, the reason for the analysis of the initial pollution of nitrogen-containing organic matter in domestic sewage is the main cause of the ammonia nitrogen content in the water. The ammonia nitrogen factor in these sewage creates conditions for the growth and reproduction of microorganisms, and it is easy to form eutrophication on the basis of the rapid growth of plankton. In addition, under the action of microorganisms, the ammonia nitrogen in the sewage will further decompose and eventually form nitrate nitrogen; In this reaction, once the reaction process is not sufficiently suppressed, it will cause the production of a large amount of nitrite nitrogen, and when it is combined with the residual and protein, it will form the carcinogen nitrosamine.

If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your work is very important to me, and your support is also the driving force for my progress. If you feel that my answer is still satisfactory, you can click on my avatar to have a one-on-one consultation. Finally, I wish you good health and a good mood! .

The removal of total nitrogen includes the removal of ammonia nitrogen, the removal of organic nitrogen, the removal of nitrate nitrogen, etc.

1. Ammonia nitrogen removal.

Generally, it can be removed by the following methods.

1) Break point chlorine oxidation method, by adding sodium hypochlorite or bleaching powder for oxidation, ammonia nitrogen is converted into nitrogen gas for release, and the common ammonia nitrogen remover on the market is basically bleaching powder.

2) The use of microbial nitrification and denitrification to remove ammonia nitrogen in sewage (wastewater) is based on the combined action of nitrifying bacteria and denitrifying bacteria to convert ammonia nitrogen in water into nitrogen to achieve the purpose of denitrification.

2. Organic nitrogen removal.

The following methods are commonly used:

In the biological method, nitrogen compounds can be converted into nitrogen under biological action;

In the chemical method, nitrogen compounds are directly converted from organic nitrogen and ammonia nitrogen to nitrogen through oxidation.

The biological method has low cost and stable effect, but the process is complex, difficult to operate, and covers a large area and has a long running time. The chemical method eliminates the intermediate conversion step, which is faster and more direct, but the cost is high, the breakpoint chlorination method is difficult to control, and the effect is unstable.

3. How to remove excessive nitrate nitrogen?

Nitrate nitrogen mainly refers to nitrate ions, and there are currently methods of ion exchange, membrane permeation, adsorption and biological denitrification. Among them, the ion exchange method, membrane permeation method and adsorption method are only the concentration and transfer of nitrate ions, and cannot really remove the total nitrogen, and the concentrated nitrate waste liquid needs to be further treated.

In biological denitrification, it mainly refers to the process by which nitrate ions are converted into nitrogen gas by the degradation of denitrifying bacteria.

There are many ways to reduce ammonia nitrogen in sewage, among which the following blowing method, zeolite deamination method, and chemical oxidation method are the three most commonly used methods to reduce ammonia nitrogen in sewage.

How to reduce ammonia nitrogen in wastewater?

1. Blowing method: a method for separating the gas-liquid equilibrium relationship between the gas phase concentration and the liquid phase concentration of ammonia nitrogen under alkaline conditions. It is generally believed that the blow-off efficiency is related to temperature, pH, and gas-liquid ratio.

2. Zeolite deamination method: the cations in the zeolite are exchanged with NH4+ in the wastewater to achieve the purpose of denitrification. Zeolite is generally used to treat wastewater containing low concentrations of ammonia or wastewater containing trace amounts of heavy metals.

3. Chemical oxidation method: a method that uses a strong oxidant to directly oxidize ammonia nitrogen into nitrogen for removal. The ammonia nitrogen remover is directly added to the sewage, which can quickly decompose the ammonia nitrogen into nitrogen, and more than 96% of the ammonia nitrogen can be removed in 5 minutes.