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polyacrylamide water treatment 2021—vcycletech


I - Outline of principle.

1.The operational performance of anionic polyacrylamide flocculant reduces turbidity and makes sludge settle with high efficiency.


2. Anionicpolyacrylamide flocculant has a considerable molecular weight and a certain amount of polar groups in the molecular chain, accelerating the settling of particles in suspension through adsorption and bridging in the flocculation process, and has apparent effects of accelerating solution clarification and promoting filtration.

3. Soluble in water, safe and non-toxic, hydrolytically stable, insensitive to PH value changes, resistant to chlorine. 5 - Not easy to burn, not easy to explode, can be stored at room temperature, can not be exposed to sunlight—this product is slightly acidic; when skin contact, it should be washed immediately with plenty of water.


You may have questions—Coagulants and Flocculants polyacrylamide (PAM) product parameters 


II - How doespolyacrylamide powder reacts with water?


How the solution is made.


Dissolutionconcentration:The standard dissolution concentration of polyacrylamide(polyelectrolyte/coagulant) is 0.1-0.5%.


Dissolution time: The time required to dissolve the coagulant varies depending on the type of coagulant, water quality, temperature, and agitation. However, mostflocculants usually require stirring for about 1 hour to dissolve the powder completely. Incomplete mixing or clumping of the flocculant can inhibit the performance of the flocculant.


Stirring speed: The ideal speed of the stirrer is between 200-400 rpm. High-speed agitator motor speed is not recommended to run under high-speed agitation as it may cutoff the molecules of flocculant. For a 1-2m3 agitator tank, the ideal agitator motor should be 1HP.


Application and dosage: The dosage range starts from 1-3.0ppm, depending on the affluent and application type. It is recommended to evaluate its function and approximate age, and a tank test is recommended.


Tank test. Nbsp; Place the sewage sample in a beaker, add as specified, and stir at 100-120 rpm for 1 minute, then stir slowly at 60 pm. Measure the flocs correctly at this time, and pay attention to the precipitation and clarity of the upper solution.


polyacrylamide water treatment

III - What is the application of cationic polyacrylamide in drinking water?


Polyacrylamide has been applied in water companies' production for many years, and it has apparent effects on improving flocculation effect, saving alum consumption, removing algae, reducing mutagenicity, and improving water quality coping with sudden water accidents.


 1-Improveflocculation effect, overcome flocculation floating in dry water period, savealum consumption, and reduce water purification cost. Low temperature and low turbidity, the composition of the water body are relatively turbid; organic matter accounts for a large proportion, once into aluminum sulfate and polymeric aluminum, the formation of cotton-like structure lose sedimentation. After polyacrylamide 0.025-0.05mg/L coagulation, due to its larger adsorption surface area and excellent bridging ability, the volume of the reaction floc formed increases, the proportion increases, the settling speed is accelerated, the sedimentation tank capacity is rapidly increased, and the turbidity is significantly reduced. The turbidity of casting polypropylene after5 minutes of coagulation is lower than 20NTU, and at the same time, is lower than the turbidity of water without coagulant 20-30NTU. Water without coagulant is seriously polluted by organic matter in raw water, and flocs float lightly. The final turbidity can not be reduced; investment and placing the residual turbidity 1 hour later did not drop significantly. Investment polyacrylonitrile and coagulation to improve the coagulation effect, saving alum's use about 25%, water production does not rise by about 5-10%, saving costs about 24%.


2-Improve water-quality, decolorization, organic matter removal, algae removal, induced reduction. Due to the coagulation effect of polyacrylamide. The turbidity of the effluent decreases obviously, and the content in organic matter and turbidity has a very close relationship with algae; according to experts, when the turbidity decreases to 0.5 degrees, the organic matter in water can be removed 80%, so adding polyacrylamide gel can effectively remove organic pollution and improve the quality of drinking water. The rate of color removal mentions that the rate is increased by more than 10%, and besides, the organic matter in the water is reduced by more than 46%, and the algae removal rate is increased by 16%-26%. The mutability of the precipitated water was reduced from positive to positive, indicating that the waterways' turbidity reduced, some organic matter was removed, and the water's mutability was improved.