APAM Powder For Wastewater Pretreatment

Jar test about nonionic polyacrylamide and APAM powder:

1) Preliminary selection of molecular weight range of PAM wastewater chemical powder: You can first select several APAM for wastewater pretreatment polymer with different molecular weights, such as APAM for wastewater pretreatment products with molecular weights of 8 million, 12 million, 16 million, 20 million, etc. 

2) Prepare solutions and add wastewater APAM to the sewage samples: Dissolve wastewater APAM products of different molecular weights in water respectively according to a certain proportion (such as 0.1%--0.5%) to prepare PAM wastewater chemical powder solutions. Then take the same volume of sewage samples and add equal amounts of PAM wastewater chemical powder solutions of different molecular weights respectively. 

3) Observe the reaction effect: Observe the reaction of each sewage sample after adding the APAM powder solution, including the sedimentation speed, the size of the flocs, the clarity of the supernatant, etc. A fast sedimentation speed, large and dense flocs and a clear supernatant indicate that the this molecular weight of APAM powder has a better treatment effect. 

4) Determine the optimal molecular weight of wastewater APAM: From the several molecular weights of wastewater APAM with better treatment effects, further refine the selection. By adjusting the gradient of the molecular weight of wastewater APAM (such as a difference of 1 million or 2 million), repeat the above experimental steps and finally determine the molecular weight of the wastewater APAM most suitable for this sewage. 

5) Consider the influence of the charge density of APAM powder : If it is found in the preliminary experiment that the optimal treatment effect cannot be achieved only by the selection of molecular weight Wastewater APAM, or the nature of the sewage is relatively special (such as containing more pollutants with specific charges), at this time, it can be considered to further test APAM powder with different charge densities. The selection range of charge density of wastewater APAM can be determined according to the actual situation, for example, from 10%--50%. Determine the most suitable charge density by following a similar experimental method as the molecular weight of APAM powder screening. 

6) Refer to PAM wastewater chemical powder technical indicators and supplier recommendations: The technical indicators of APAM powder products produced by different manufacturers may vary. When determining the model, you can refer to the PAM wastewater chemical powder product manual, technical parameters and other materials provided by the supplier to understand the information such as the molecular weight range of APAM powder, charge density range of wastewater APAM, solubility and application scope of the nonionic polyacrylamide product. At the same time, you can also communicate with the technical personnel of the supplier of APAM powder, describe the nature of the sewage, APAM for wastewater pretreatment process and equipment to them in detail and listen to their suggestions and experiences. They may recommend a suitable model for you based on previous cases and practical experiences. But it should be noted that the suggestions of nonionic polyacrylamide suppliers are for reference only and the final model of APAM powder determination still needs to be judged based on the actual experimental results. 

7) Conduct jar test and pilot tests: Before actual application of wastewater APAM, conduct jar tests first. After the jar test of is successful and satisfactory results are obtained, conduct medium-scale pilot tests. Through jar test and pilot tests of APAM powder, the effect and stability of the selected model of APAM powder in the actual treatment process can be further verified to ensure that it can meet the needs of actual production. At the same time, it can also be observed whether this model of the PAM wastewater chemical powder product can still maintain a good treatment effect under different operating conditions (such as dosage, stirring speed, reaction time, etc.), thereby providing more accurate operating parameters for practical applications.

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