Regarding the PH of the inlet water for sewage treatment

It depends on the optimal pH conditions required for the subsequent physicochemical treatment process.

1.Generally, the fitness equipment is mostly made of electroplated metal materials, and the wastewater contains CR (6+) ions, so the inlet water of the sedimentation tank should undergo a reduction reaction and add alkaline agents (PAM may also be added as needed) to make pH = about 11, which is conducive to the reduction of trivalent Cr ions to generate insoluble hydroxides and precipitate.

2.The subsequent air flotation process may be to remove refractory organic matter from the water, and the wastewater needs to be acidified (pH=2-3).

3.Filtration is to further remove SS and so on, so that the concentration of heavy metal ions meets the strict discharge water quality standards. The pH value of the influent can be adjusted to about 6-7 in combination with the subsequent anaerobic biochemical (hydrolysis acidification method), and the pH value of the treated wastewater changes slightly, which can meet the requirements of aerobic treatment.

4.The pH control method can adopt an automatic control system composed of a pH meter and an acid or alkali addition system, and preset the pH value according to the required pH value, so that the water and the agent can go through a certain mixing and reaction to meet the process control requirements.

The regulating pool you are talking about is what it does.

No matter what treatment method is, the basic thing is to adjust the sewage to neutral.

See your introduction with activated sludge tank and anaerobic tank inside.

So it's better to have a pH value above 7 and below 9.

How to deal with it:

1. Carry out slurry replacement, pump the slurry in the absorption tower into the accident slurry tank for 1-2m, add fresh slurry, and slowly digest the slurry in the accident slurry tank after the pH value returns to normal;

2.Stop adding slurry, observe the change of pH value, reduce to the lowest, add a small amount of slurry until the pH value returns to normal, and discharge more wastewater at the same time;

3.Strengthen dewatering and reduce the amount of slurry.

Sewage treatment method:

1) Physical method: the use of physical action to treat, separate and ** pollutants in wastewater. For example, the precipitation method (gravity separation method) removes suspended solids with a relative density greater than 1 in water; Filtration method (filter screen, sand layer, activated carbon) can remove suspended solids in water; The evaporation method is used to concentrate non-volatile and soluble substances in wastewater, and there are also centrifugal separation methods, vapor flotation (flotation) methods, high-gradient magnetic separation methods, etc.

2) Chemical method: use chemical reaction or physicochemical action to treat **soluble waste or colloidal substance. For example, the neutralization method is used to neutralize acidic or alkaline wastewater; The extraction method uses the "allocation" of soluble wastes with different solubility in the two-phase interaction, such as phenols and heavy metals; The redox method is used to remove reducing or oxidizing pollutants in wastewater and kill pathogenic bacteria in natural water bodies.

In addition, there are coagulation methods and chemical precipitation methods.

3) Physicochemical method: adsorption, ion exchange, extraction, membrane separation, evaporation.

4) Biological method: the use of microbial biochemical action to treat organic pollutants in wastewater. For example, biological filtration and activated sludge are used to treat domestic sewage or organic production wastewater, so that organic matter can be converted and degraded into inorganic salts and purified. There are also biofilm method and biopond method.

5) Sludge land treatment method: used for organic matter treatment. Sewage irrigation, slow infiltration, rapid infiltration, treatment through the sewage treatment plant, and then recycling, used to flush toilets and other uses.

Summary. First of all, the biochemical system of sewage treatment has a certain pH adjustment ability, how high is the pH you are talking about, if the pH range is 6-10, the biochemical system is acceptable and will not be affected too much.

If it is higher, it is necessary to add a certain amount of acid to the raw water part for neutralization.

How to adjust the pH value of sewage treatment if it is too high.

Hello dear. I have received your question. I'm in the process of collating relevant information and content. I'm typing for a little time now, and I hope you'll be patient for five minutes or so.

First of all, the biochemical system of sewage treatment has a certain pH adjustment ability, how high is the pH you are talking about, if the pH range is 6-10, the biochemical system is acceptable and will not be affected too much. If it is higher, it is necessary to add a certain amount of acid to the raw water part for neutralization.

If you want to add acid. Then add that kind of medicine.

Thank you. Generally, dilute hydrochloric acid is added.

Summary. Hello, I am glad for you what is the reason for the high pH value of sewage, A: The hardness and alkalinity of the water body are not enough; The algae in the new water have not yet multiplied, the water quality is not stable, and the humus in the pond is insufficient; Water rich in blue-green algae sometimes reaches above in the afternoon due to strong photosynthesis; The water quality is polluted by alkaline substances.

For ponds or sewage with high pH, do not clean or disinfect the pond with quicklime during daily management. Kexyl can be used to control the overgrowth of phytoplankton, pay attention to the use of zeolite powder to press the pond after algae killing, and use oxygenation bottom to keep the bottom clean, and regularly use good water color and other microecological agents to stabilize the water color.

Hello, I am glad for you what is the reason for the high pH value of sewage, A: The hardness of the water body and the alkalinity are not enough; The algae in the new water have not yet multiplied, the water quality is not stable, and the humus in the pond is insufficient; Water rich in blue-green algae sometimes reaches above in the afternoon due to strong photosynthesis; The water quality is polluted by alkaline substances. For ponds or sewage with high pH, do not clean or disinfect the pond with quicklime during daily management.

Kexazil can be used to control the overgrowth of planktonic plants, pay attention to the use of zeolite powder to press the pond after algae killing, and use oxygenation bottom to keep the bottom clean, and regularly use good water color and other microecological agents to stabilize the water color. Wild Jean.

Let me reiterate that the pH at the inlet of the biochemical section of sewage treatment is not high, but why does the pH increase after biochemical treatment?

If it is a biological treatment method, it is mainly the secondary metabolites produced by the incomprehensible wide fiber of the organic matter of the microbial vertical pulsation or the self-decomposition of the microorganism when it reaches the stage of decay. The organic acids produced by hydrolysis itself are oxidized and decomposed, and the dissolved CO2 in the water is blown off more by aeration, and the pH rises. Take with care.

There is also a reason for wastewater treatment, because the anaerobic pond should consume VFA to produce water and methane and carbon dioxide, carbon dioxide dissolves in water, produces carbonic acid, carbonic acid belongs to the weak acid, easy to volatile, when the wastewater is discharged after anaerobic treatment, carbonic acid decomposes, produces water and carbon dioxide, and the pH value will rise to a high letter.

Add a few aeration pipes in the regulating tank, adjust the water evenly through aeration stirring, and you can also change the regulating tank to a hydrolysis tank to kill two birds with one stone, you can transfer water and improve the treatment efficiency.

Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a certain body of water or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and is increasingly entering the daily life of ordinary people.

Summary. Add the alkali. Acids can react with alkaline or alkaline oxides to form salts and water.

Fermentation can be defined as the process of biodegradation of organic compounds as both electron acceptors and electron donors, in which dissolved organic matter is converted into terminal products dominated by volatile fatty acids, hence this process is also known as acidification.

In the process of anaerobic degradation, the acidifying bacteria's tolerance to acids must be taken into account. The acidification process can be carried out when the pH drops to 4. However, the pH range of methane production is in between, so a decrease in pH will reduce methane production and hydrogen consumption, and further cause changes in the composition of the acidification terminal products.

How to deal with sewage pH value less than 6.

It is possible that the desulfurization slurry is not completely dissolved.

1. Carry out slurry replacement, pump the slurry in the absorption tower into the accident slurry tank for 1-2m, add fresh slurry, and slowly digest the slurry in the accident slurry tank after the pH value returns to normal;

2.Stop adding slurry, observe the change of pH value, reduce to the lowest, add a small amount of slurry until the pH value returns to normal, and discharge more wastewater at the same time;

3.Strengthen dewatering and reduce the amount of slurry. When adjusting the reaction in the absorption tower, the outlet concentration will exceed the standard for a short time, so it is necessary to say hello to the Environmental Protection Bureau in advance.

Slaughter sewage. Anaerobic good maintenance process.

Are you there. Yes, yes.

Hold on. Add the alkali. Acids can react with alkaline or alkaline oxides to form salts and water.

Fermentation can be defined as the process of biodegradation of organic compounds as both electron acceptors and electron donors, in which dissolved organic matter is converted into terminal products dominated by volatile fatty acids, hence this process is also known as acidification. In the process of anaerobic degradation, the acidifying bacteria's tolerance to acids must be taken into account. The acidification process can be carried out when the pH drops to 4.

However, the pH range of methane production is in between, so a decrease in pH will reduce methane production and hydrogen consumption, and further cause changes in the composition of the acidification terminal products.

What should I do?

Add the alkali. Acids can react with alkaline or alkaline oxides to form salts and water.

There is also a question of how to deal with high ammonia nitrogen and total nitrogen indicators in slaughtering sewage.

On the first day, add 10kg of compound strains to the anaerobic pool (take the sewage in the pool and pour it in), and add 20kg of compound strains to the aerobic pool. Turn on the fan to aerrate all the time, and a small pump can be added to the anaerobic tank to make the water flow in the pool in a slightly agitated state. From the second day to the seventh day, the nutrients were added according to the nutrition table.

On the fifth day, add 10kg of nitrifying bacteria to the aerobic pond and start a small amount of water on the eighth day, it is recommended to take about 15 square meters. 6) On the tenth day, the water output is relatively stable, and the water inflow is slowly increased.

We have strains or not.

What does that mean, there is no fungus, right?

If you don't have one, you can buy digestive bacteria.

I hope it helps.

According to the "Comprehensive Sewage Discharge Standard" GB 8978-88 and the "Pollutant Discharge Standard for Urban Sewage Plants" GB 18918-2002, the pH value of the water discharged from urban sewage plants is 6 9.

1. The pH value of the effluent of the biochemical tank of the general urban sewage treatment plant is usually 6 9, and the specific effluent pH value varies according to the process of the biochemical tank.

The pH value of the effluent from most aerobic biochemical tanks should be maintained between to and to.

The pH value of the effluent of most anaerobic biochemical tanks should be maintained between to and to, and the pH value of the inlet and outlet water of the anaerobic pond should be strictly controlled within the range during cultivation.

2. The pH value of the effluent of the biochemical tank of industrial wastewater is usually 6 9, which may cause large fluctuations in the pH value of the effluent of the biochemical pool due to the difference in raw materials and treatment processes.

3. Usually the pH value of the biochemical pool is between 7-8.

What will the high pH of the membrane inlet water in the sewage treatment plant sound? Answer: Abnormal pH value will cause unstable phenomena such as coagulation, air flotation, bridge adsorption, and electrochemical methods in sewage treatment.

Among them, the coagulation and sedimentation method is widely used in sewage treatment, which can make the effluent quality after sewage key judgment and water treatment meet the discharge standard. Influence of physicochemistry: the floc in coagulation treatment is small, and the coagulation effect is poor.

2 2. Influence of biochemical section: the surface of the activated sludge sedimentation tank has a sour smell, the membrane hanging on the filler falls off, and the treatment efficiency decreases.