Please be specific about ammonia nitrogen pollutants in water bodies

1. Ammonia nitrogen caused by organic matter exceeds the standard;

In the process of operation, the CN ratio is less than 3 in the ammonia nitrogen wastewater, the denitrification process requires the CN ratio to be 4 6, and the carbon source is added to improve the completeness of denitrification, 2. The ammonia nitrogen caused by internal reflux exceeds the standard; There are two reasons: electrical failure of the internal return pump (there is still a signal for on-site tripping), mechanical failure (impeller falling off, etc.) and human reasons (internal reflux has not been tried to rotate forward or reverse, and the site is in a positive or reverse state).

3. Ammonia nitrogen exceeding the standard caused by low pH; · The internal reflux is too large or the internal reflux aeration is too large, resulting in a large amount of oxygen flowing into pool A, destroying the anoxic or anaerobic environment, the aerobic metabolism of denitrifying bacteria, and some organic matter being metabolized by aerobic energy, which seriously affects the integrity of denitrification. · The pH drops due to the decrease in the alkalinity of the influent water. (controllable).

4. Ammonia nitrogen caused by DO (dissolved oxygen) exceeds the standard; Sewage is a high hardness water quality, especially easy to agglomerate, and various problems will occur in the aeration head during operation, such as blockage, damage, etc., resulting in the increase of ammonia nitrogen in the DO all the time.

5. Ammonia nitrogen exceeding the standard caused by mud age;

There is too much backlog of sludge and too much dead sludge, which leads to an increase in ammonia nitrogen.

The sludge reflux is uneven, and the reflux difference between the two sides of the system is too large, resulting in an increase in ammonia nitrogen on one side of the sludge reflux stream.

6. Ammonia nitrogen exceeding the standard caused by ammonia nitrogen impact;

Industrial wastewater and domestic sewage are in the same pipe network, resulting in a sudden increase in ammonia nitrogen.

Nitrification system, establish a complete nitrification system, integrated HNF process, based on cyclone denitrification filler, low-temperature denitrification bacteria and high-density separator, to achieve all-round denitrification.

The reasons for the excessive ammonia nitrogen in industrial wastewater may be as follows: 1. There is a problem with the nitrification reaction, and see if the various parameters of the aeration tank are normal. 2. After hydrolysis and acidification, after the ammonia of organic nitrogen, the concentration of ammonia nitrogen increases, and the nitrification effect of the aeration tank is limited.

Solution: Improve the nitrification process, upgrade the existing process, and improve the denitrification efficiency.

The reasons for the excess of ammonia nitrogen are mainly in two aspects, the first background value is too high. Second, there is a polluting impact. The first is that the regional ammonia nitrogen is too high, and the background value of the guideline will exceed the standard. The second artificial emission of ammonia nitrogen will also cause exceedance!

Excessive ammonia nitrogen in a water body indicates that someone is discharging sewage into the water body, which may be chemical waste or organic waste.

1. The reasons for exceeding the standard may be:

1) Your company is more water-saving;

2) Your company is very densely staffed, with a large number of personnel, and the frequency of toilet use is high;

3) The time period of excretion of your company's personnel is relatively concentrated, such as during the day, and the sampling of sewage plants is also in this time period.

4) The discharge port is very close to the toilet (resulting in an unrepresentative sample taken by the sewage plant personnel).

5) Other sewage is mixed in.

2. Investigation method: regular sampling and testing;

1) Samples were taken at different time periods on the same day at the discharge port to determine the ammonia nitrogen value.

2) Sampling at different discharge wellheads in the plant area to determine the ammonia nitrogen value.

3) Measure the ammonia nitrogen value of the sample in the inspection well of the pipeline closest to the toilet.

Analyze them separately to determine whether your unit is caused by uneven discharge, whether it is unrepresentative sampling, and whether it is caused by toilet discharge.

If not, then there must be a high ammonia nitrogen value in the well somewhere, and the investigation of the wastewater there** can determine where the high ammonia nitrogen value wastewater comes from.

3. Treatment method: I don't know the reason, there is no specific improvement method. In short, the right medicine is enough.

4. Purchase tools and facilities: If your unit ammonia nitrogen value exceeds the standard a lot, and finally finds that there is no objective reason, that is, it exceeds the standard, then you need to set up treatment facilities.

There are four main reasons for the excessive ammonia nitrogen in sewage: the ammonia nitrogen concentration of raw water exceeds the process design value; The water volume is overloaded in a short period of time, and the residence time of the sewage reaction is insufficient; Temperature, nutrient ratio, pH value, etc. will affect the reproduction of strains, and the problem of ammonia nitrogen exceeding the standard in winter is serious. Equipment aging, facility maintenance and renewal, etc.

Questions. Should the anaerobic pool be oxygenated.

No, anaerobic is a biochemical treatment process in which anaerobic bacteria participate, anaerobic bacteria do not need oxygen, it can be said that oxygen is toxic to them, so the dissolved oxygen in the system is required to be equal to zero, which is the biggest feature, in addition, the anaerobic reaction requires a higher and more stable temperature, of which the medium temperature reaction is between 31 and 33 degrees Celsius. Anaerobic reactions require a strict pH.

The reasons why the ammonia nitrogen in sewage treatment is too low, 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 50% of the nitrate nitrogen for denitrification; The proportion of mixed liquid reflux to the anoxic section is controlled from about 100%-300%. 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.

1. There are many reasons for ammonia nitrogen exceeding the standard, mainly including the absence of nitrifying bacteria in the system, insufficient residence time, insufficient alkalinity, insufficient aeration capacity, etc.

2. Nitrifying bacteria are the key bacterial group for ammonia nitrogen degradation, so whether they grow healthily determines the ammonia nitrogen degradation in your system.

3. The second is the presence of nitrifying bacteria, and the residence time is insufficient, that is, caused by insufficient dissolution load.

4. The residence time is sufficient, but the aeration capacity is insufficient, and the ammonia nitrogen cannot be degraded, because 1 unit of ammonia nitrogen needs one unit of oxygen, and the aerobic amount is very large.

5. The existence of nitrifying bacteria, the residence time is enough, and the aeration capacity is sufficient, that is, the alkalinity is insufficient, the nitrification reaction cannot be started if the alkalinity is insufficient, and ammonia nitrogen cannot be degraded.

There are several reasons for this.

1. Ammonia nitrogen caused by organic matter exceeds the standard 2, ammonia nitrogen caused by internal reflux exceeds the standard 3, and ammonia nitrogen caused by low pH exceeds the standard.

Summary. 3. The process is not perfectWhen the temperature and dissolved oxygen in the sewage are too low, the activity of the bacteria in the sewage decreases, and the normal metabolism cannot be achieved, so that the ammonia nitrogen in the sewage can not be decomposed normally, once the concentration of ammonia nitrogen in the sewage is too high, it will poison the bacteria in the biochemical pool, and the ammonia nitrogen will rise after the bacteria are destroyed, so it will enter an infinite vicious circle. Workaround:

It is common to improve the process and increase the number of cultures in the biochemical tank, which can effectively reduce the ammonia nitrogen value in the water, but the modification process requires shutdown and can be costly.

Reasons why ammonia nitrogen is too low in wastewater treatment.

First, the oxygen supply environment changes the sludge produced in the secondary sedimentation tank is mainly in the biofilm after falling off, because the biofilm is mainly aerobic bacteria, in the oxygen supply environment from aerobic to anaerobic, a large number of aerobic bacteria rupture, cytoplasm dissolution, part of the facultative bacteria and anaerobic bacteria use synthetic bacteria, resulting in the biochemical degradation of the ammonia nitrogen part is not well treated, and finally a large amount of sludge exists, so that the ammonia nitrogen in the secondary sedimentation tank does not fall but rises.

Solution: Strengthen the sludge treatment capacity of the secondary sedimentation tank or increase the sludge treatment frequency.

2. Ammonia nitrogen is mainly used in the decomposition of nitrogen-containing organic matter in domestic sewage, industrial wastewater such as coking and synthetic ammonia, as well as farmland drainage. The ammonia nitrogen produced in the production of enterprises will also be too high, such as: landfill leachate, catalyst production plant wastewater, meat processing wastewater and synthetic ammonia chemical wastewater all contain extremely high concentrations of ammonia nitrogen.

Solution: In this case, we can only start with the production process to develop new products or processing processes to avoid the production of ammonia nitrogen, but the intermediate research and development process and time take a long time.

3. The process is not perfectWhen the temperature and dissolved oxygen in the sewage are too low, the activity of the bacteria in the sewage decreases, and the normal metabolism cannot be achieved, so that the ammonia nitrogen in the sewage can not be decomposed normally, once the concentration of ammonia nitrogen in the sewage is too high, it will poison the bacteria in the biochemical pool, and the ammonia nitrogen will rise after the bacteria are destroyed, so it will enter an infinite vicious circle. Solution: The process is usually improved and the bacteria in the biochemical tank are added, although this method can effectively reduce the ammonia nitrogen value in the water, but the modification process needs to be shut down and the cost will be high.

In the case that the above methods are not feasible, in order to save costs on the premise of convenient and effective removal of ammonia nitrogen, we recommend you to use Xijie ammonia nitrogen remover, which can be directly added without equipment, concentrated products, with less addition amount, removal rate of up to 95%, 5 to 6 minutes can be discharged up to the standard, and will not produce secondary pollution.

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.

The ammonia nitrogen in the effluent of the sewage treatment plant is too low, but the total nitrogen is very high, which may be the reason why the ammonia nitrogen in the effluent is low, but the total nitrogen is very high, because there may be two points: 1The dissolved oxygen concentration in the reaction pool is very high, and there is no denitrification stage, all ammonia nitrogen 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.

Ammonia nitrogen refers to the nitrogen present in water in the form of free ammonia (NH3) and ammonium ions (NH4+). The nitrogen content of animal organic matter is generally higher than that of plant organic matter.

At the same time, the nitrogen-containing organic matter in human and animal manure is very unstable and easily decomposes into ammonia. Therefore, when the ammonia nitrogen content in water is high, it refers to the chemical nitrogen in the form of ammonia or ammonium ions.

Ammonia nitrogen is a nutrient in water bodies, which can lead to water eutrophication, and is the main oxygen-consuming pollutant in water bodies, which is toxic to fish and some aquatic organisms.

The ammonia nitrogen concentrations in different effluents are as follows:

1. The concentration of high-concentration ammonia nitrogen wastewater is NH3-N>500mg L.

2. The concentration of medium concentration ammonia nitrogen wastewater is NH3-N: 50-500mg L.

3. The concentration of low-concentration ammonia nitrogen wastewater is NH3-N<50mg L.

Hazards of ammonia nitrogen to human health:

Ammonia nitrogen is a kind of synthetic nitrogen, which exists in both ionic ammonia and non-ionic ammonia in water, and the free ammonia in ammonia nitrogen is toxic and can cause non-carcinogenic risks to human health. When the concentration of ammonia in the air reaches 50mg m3, after the human body is exposed to this environment for 2 hours, the nose, eyes and respiratory tract of the human body will have a sense of stabbing limb burial, when the air concentration of ammonia nitrogen is, the human body is exposed to this environment for a long time, and the human respiratory tract, throat and lungs will be damaged. In addition, nitrite converted by ammonia nitrogen can form carcinogenic ants with ammonium compounds, which can cause methemoglobinosis and infantile cyanohemoemia when it enters the human body.