What are the introductions of imported polyacrylamide for industrial wastewater treatment?

Imported polyacrylamide is mainly used as a flocculant: for suspended particles, coarse, high concentration, particles with positive charge, water pH value is neutral or alkaline sewage, because the anionic polyacrylamide molecular chain contains a certain amount of polar radicals can adsorb the solid particles suspended in the water, so that the particles are bridging to form large flocs. Therefore, it accelerates the sedimentation of particles in suspension, which has a very obvious effect of accelerating the clarification of the solution and promoting filtration.

The product is widely used in the treatment of chemical industry wastewater, waste liquid, and municipal sewage treatment.

According to the chemical properties of the main pollutants contained in industrial wastewater, it is mainly divided into: organic wastewater containing mainly organic pollutants, inorganic wastewater containing inorganic pollutants, mixed wastewater containing both organic and inorganic substances, wastewater containing radioactive substances and cooling water contaminated by heat only, and heavy metal wastewater. For example:

Wastewater from food or petroleum processing is organic wastewater, while wastewater from mineral processing and electroplating wastewater is inorganic wastewater.

According to the classification of industrial processing objects, it can be divided into: metallurgical wastewater, textile wastewater, papermaking wastewater, tanning wastewater, pesticide wastewater, oil refining wastewater, mineral processing industry, dyeing industry and sugar industry.

Alcohol plant wastewater, brewery wastewater, monosodium glutamate factory wastewater, sugar factory wastewater, meat products factory wastewater, beverage factory wastewater, textile printing and dyeing factory wastewater, etc. The effect of using cationic polyacrylamide is several times or dozens of times higher than that of anionic polyacrylamide, nonionic polyacrylamide or inorganic salts. This is because this type of wastewater is generally negatively charged.

Activated sludge treatment method is commonly used for municipal sewage and industrial wastewater, and biochemical sludge is often a very hydrophilic colloid, with high organic content and extremely difficult to dewater. Treated with cationic polyacrylamide, the dosage is small, the dehydration efficiency is high, and it is easy to separate.

The selection of imported polyacrylamide is mainly based on the different types of charge carried by the sewage water quality, and the selection of cationic polyacrylamide, anionic polyacrylamide, nonionic polyacrylamide, etc. is selected according to the characteristics of water quality. No matter what industry and what water quality, choosing the right model is the most critical, mutation events occur from time to time, once the change, we must be calm, do not just look at the problem itself, to find a way to solve it, itself polyacrylamide selection is a very experimental process.

Hello, when polyacrylamide is used, the concentration, generally, is common, is a ton of water to dissolve 1kg of polyacrylamide. The specific dosage can not be determined, because the amount of different types of water is different, and the dosage of different manufacturers of the same type is also different.

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The dissolution concentration of PAM is generally controlled, and the dosage is first tested according to the concentration of sewage, and the proportion is controlled at 3 6ppm, first from the maximum proportion, and then gradually lowered the proportion to see the reaction effect.

Generally, we will prepare a solution, and then try to determine the amount of engineering

It is said that this has to be tried, and it is best to have the most flocs and the least elixir.

The quality of the sewage varies from one pharmaceutical manufacturer to another, and the concentration seems to be 2-3 parts per thousand.

The small test determines that different wastewater and different processes are different.

The application of polyacrylamide in the water treatment industry mainly includes three aspects: raw water treatment, sewage treatment and industrial water treatment. In raw water treatment, polyacrylamide is used in combination with activated carbon, which can be used for the cohesion and clarification of suspended particles in domestic water; In sewage treatment. Polyacrylamide can be used for sludge dewatering; In industrial water treatment, it is mainly used as a water treatment agent.

In raw water treatment, the organic flocculant is used instead of the inorganic flocculant, and the water purification capacity can be increased by more than 20% even if the sedimentation tank is not modified.

Therefore, at present, many large and medium-sized cities use their products as flocculants when the water supply is tight or the water quality is poor. In wastewater treatment, the use of water reuse cycles can be increased.

Shouxin Chemical will answer the factors that affect the dosage of polyacrylamide PAM:

1. Sewage water quality and concentration:

The water quality and concentration of sewage in different factories have a great relationship with the amount of polyacrylamide, such as the same sand washing plant, the sewage sediment content is different, the amount of polyacrylamide used is different, the same sediment content, different water quality and mud quality in different regions will also lead to different product usage. The water quality of industrial wastewater from chemical plants, pharmaceutical plants, paper mills, etc. is much more complex than that of sand washing plants, and small changes can cause changes in dosage levels.

2. On-site use conditions:

On-site use conditions include the dissolution concentration of water treatment chemicals, dissolution time, length and strength of coagulation time, and the influence of process equipment. When the dissolution concentration is high, it will increase the difficulty of coagulation, and the amount of agent used is not easy to control. The short dissolution time leads to the waste of chemicals and the increase in the amount of chemicals used.

When the coagulation time is short and the strength is low, it is not suitable to use high molecular weight or high concentration solution products, which is easy to waste agents. The influence of process equipment, such as the plate and frame machine is more drug-saving than the filter belt machine, and the equipment of different manufacturers has different water filtration performance. The above problems are just examples, and the operating conditions and equipment influence have a great impact on the amount of chemicals used in practical applications.

Third, the problem of product selection:

The polyacrylamide model determines its dosage, such as the use of anionic polyacrylamide 18 million molecular weight and anionic 8 million molecular weight, although the molecular weight is not the higher the better, but for most of the water quality high molecular weight products are used properly if the cost performance is still high, the two models are used in the same water quality The dosage is completely different, and it may be twice as bad or even worse.