What Kind Of Polyacrylamide Is Used To Treat Nickel Mine Wastewater

What kind of polyacrylamide is used to treat nickel mine wastewater? Coagulation and sedimentation methods are generally used to treat nickel mine wastewater. Polyacrylamide and polyaluminum chloride are mainly used, which can reduce the turbid substances in the wastewater and condense the dispersed substances in the wastewater into shapeless substances through bridging and adsorption. Colloidal particles can then form a precipitate.

In the wastewater treatment process, the type of polyacrylamide needs to be selected according to the water quality of nickel mine wastewater. Generally, anionic polyacrylamide and nonionic polyacrylamide are selected for treatment. Regarding which type of polyacrylamide to use, it is recommended to conduct experiments first to determine a more suitable product model with a smaller dosage.

https://www.youtube.com/watch?v=qb9kDHK5B5k
How to use polyacrylamide

1. When using polyacrylamide, it can be formulated into an aqueous solution with a concentration of 0.01%-0.05%. It is appropriate to use neutral water without salts and impurities.

2. When the polyacrylamide is dissolved, evenly sprinkle the anionic polyacrylamide product into the stirring water, and control the stirring speed at 100-300rpm. Appropriate heating (<60℃) can accelerate dissolution.

3. Adjust the pH value of the liquid to be treated so that the anionic polyacrylamide product can fully exert its effect, and select the appropriate pH value and product dosage through experiments.

4. When adding anionic polyacrylamide product solution, the mixing with the liquid to be treated should be accelerated. When flocs appear, the stirring speed can be slowed down to facilitate the growth of flocs and accelerate settlement.

Pay attention to the use of polyacrylamide in sludge dehydration. There are many types of polyacrylamide, so the selection of the type is more important, because it is an important factor affecting the effect, and then it is the problem of the operation process after the selection. Operational Problems of Polyacrylamide Used in Sludge Dewatering 1. Water pressure problem, sometimes due to insufficient water supply pressure, the dissolution funnel of the material feeder cannot send the polyacrylamide agent into the preparation pool, resulting in blockage. The solution is to use a water pump to increase the water pressure. 2. The sludge dehydration polyacrylamide solution is recommended to be prepared and used immediately to prevent it from being left for too long and may affect the treatment effect. 3. When the container is cleaned, it should be cleaned in all aspects, so that the impurities sticking to the wall of the drum can be better cleaned up, and the drum can be given a balanced speed. 4. Regularly adjust the operating frequency of the dehydrator. When the dehydrator vibrates violently, it should be prohibited to feed again immediately, and the next step should be dredged first. 5. The concentration of sewage sludge is relatively high during water purification. At this time, it is best to let the sewage stand for a period of time, and then extract the clean solution above to increase the concentration of sludge for treatment.

Related Posts