Municipal sewage flocculant

Municipal sewage flocculant
Is it better to use anions or cations as municipal sewage flocculants? As well as analysis of the anion and cation dosage of flocculants in urban domestic sewage treatment plants. How much flocculant is used in a general sewage treatment plant in a day? Taking 10,000 tons of municipal water as an example, What is the dosage of imported flocculant or domestic flocculant? Cation degree of polyacrylamide flocculant for municipal sewage
Features of flocculant for municipal sewage treatment
Economical to use, good results can be achieved at a very low dosage
It can significantly improve production efficiency or increase the solid content of mud cake
Easily dissolved in water
In the solid-liquid separation during the production process, it can improve the capture rate of solids
In a wide H value range Work effectively within.
Use of municipal sewage flocculant
To determine the amount of municipal sewage flocculant, it depends on where you use it. If it is used for sewage sedimentation, the cubic meter of water, m or less, may be imported flocculant. Under M, most of this type of flocculant is used with polyaluminum. If it is used for sludge desludge later, it depends on the biochemical conditions of your mud. For square mud water, it is possible to use even M. Xinxiang Bainuo Chemical recommends that this be done with a selection test. If you have any questions, you can also call us for consultation!
English abbreviation of polyacrylamide
Use relatively clean water to dissolve and dilute polyacrylamide M. If There are too many dissolved substances in the water, which will be detrimental to the dissolution and flocculation effect of M. The dissolution time generally takes ~ minutes. The dissolution process is stirred by the mixer in the dissolution tank, but the stirring speed cannot be too fast to prevent the molecular chains of M from being disrupted. Breakage will affect its flocculation effect.
The proportioning concentration of polyacrylamide is generally: anionic or non-ionic, the dissolved concentration is ., the cationic type cannot exceed. When used, it should be diluted twice with water.
The dosage ratio of polyacrylamide is roughly: when the concentration of the suspension material is , add the amount of flocculant.
. Powdered polyacrylamide is the one that comes into contact with more. Powdered polyacrylamide should not be added directly. It must be dissolved evenly with clean water (such as tap water) and then added according to a certain proportion
br/>. It is recommended that the concentration of polyacrylamide be controlled at... when it is dissolved. Generally dilute it twice before use.
When dissolving, polyacrylamide is slowly and evenly added to the aqueous phase with stirring. The stirring speed should not be strong (the linear speed of the end of the stirring blade is controlled below m/s) to avoid causing a decrease in the shear reduction force of polyacrylamide. Adding the ingredients too quickly will also form clumps and form fish eyes.
Urban sewage treatment polyacrylamide
Refers to the general term for sewage discharged into the urban sewage system. At the same time, urban sewage also includes domestic sewage and industrial sewage. When choosing polyacrylamide as a flocculant for urban sewage, , generally using cationic polyacrylamide, the ionicity is generally around ~, of course, depending on the water quality, specific problems must be analyzed in detail.
Industrial wastewater polyacrylamide
According to the chemical properties of the main pollutants contained in industrial wastewater, it is mainly divided into: organic wastewater containing mainly organic pollutants, and containing inorganic pollutants Inorganic wastewater, mixed wastewater containing both organic and inorganic substances, wastewater containing radioactive substances, cooling water contaminated only by heat, 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 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, etc.
The activated sludge treatment method is commonly used for urban sewage and industrial sewage. Biochemical sludge is often a highly hydrophilic colloid with high organic content and is extremely difficult to dehydrate. Treated with cationic polyacrylamide, the dosage is small, the dehydration efficiency is high, and it is easy to separate.
Alcohol factory wastewater, brewery wastewater, MSG factory wastewater, sugar factory wastewater, meat product 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. Because this type of wastewater generally has a negative charge.
The selection of polyacrylamide is mainly based on the different types of charges carried by the sewage water quality. According to the characteristics of the water quality, cationic polyacrylamide, anionic polyacrylamide, ionic polyacrylamide, etc. are selected. The process is generally as follows From small tests in the laboratory to large-scale tests by manufacturers and final product selection, specific problems are analyzed in detail. No matter what water quality in any industry, choosing the right model is the most critical. Sudden events happen from time to time. Once changes occur, we must treat it calmly. Don’t just look at the problem itself, but find a solution. Polypropylene itself The selection of amide is a very experimental process.
This requires suppliers to have certain professional knowledge, not only to provide high-quality and low-price products, but also to keep up with after-sales service, so that pre-sales, sales, and after-sales services are consistent.
Cationic polyacrylamide product categories and performance indicators

Low, medium, high ionicity
Molecular weight [10,000]
Solid content/﹪
Free monomer/ ﹪
Dissolution time [m]
Anionic polyacrylamide product performance indicators
Model appearance solid content ( ) Molecular weight (10,000) Charge density
Anionic white powder
[Packaging and Storage] Polyacrylamide is packaged in bags or paper composite bags, or it can be packaged according to customer requirements. The number of stacking layers must not exceed 1. The shelf life is one year. The products must be stored in a cool and dark place.
, usually in the form of dry powder, but also in emulsion type, can be roughly divided into anionic polyacrylamide, cationic polyacrylamide and nonionic polyacrylamide according to the difference in charge. The molecular weight ranges from 100,000 to 10 million. , molecular weight anions, non-ions and cations. The specific model selected depends on the different sewage media being treated.