Yesterday, we received a technical inquiry from an engineer at a water authority in a Southeast Asian country:
"We are implementing a rural drinking water defluoridation project. The raw water has a fluoride content of 3.2-4.0 mg/L and a pH of 7.8-8.2. We need to build a defluoridation station with a daily treatment capacity of 500 tons. Which type of defluoridation agent is most suitable for our water quality conditions? Do you have any suggestions?"
The following is some data of Zibo Xiangrun activated alumina defluoridation agent:
Based on the customer's operating environment and the actual application data of activated alumina defluoridation agents, Zibo Xiangrun recommends that customers choose 2-3mm activated alumina. So, why choose 2-3mm activated alumina?
1. Balancing Fluoride Removal Efficiency and Operating Resistance
Raw water has a high fluoride content (3.2-4.0 mg/L), requiring sufficient adsorption efficiency. The 2-3mm size, by comparison, offers a more suitable specific surface area, adsorption rate, and operating pressure drop.
2. Optimization Considerations for Water Quality
A slightly alkaline pH (7.8-8.2) reduces adsorption efficiency and requires a longer contact time. We recommend adjusting the pH to the optimal range of 5.5-6.5. The 2-3mm size offers the best balance between adsorption kinetics and mass transfer efficiency, making it suitable for a 500 tons/day treatment scale and offering the best equipment investment and operating costs.
3. Operation and Maintenance Considerations
A crushing strength of ≥50N/particle is sufficient to withstand regular backwashing. Uniform particle size effectively prevents bed compaction and channeling.
Zibo Xiangrun's activated alumina defluoridant offers the following advantages:
Optimized pore structure design:
Specific surface area ≥ 320 m2/g: Provides ample adsorption sites
Pore volume of 0.4-0.5 ml/g: Ensures excellent fluoride ion diffusion channels.
Bulk density of 0.7-0.8 g/ml: Ensures uniform filling.
Excellent mechanical properties:
High strength ensures long-term operational stability.
Low wear rate extends service life.
Uniform particle size distribution ensures uniform water flow.
If you have any questions or needs regarding activated alumina defluoridation agents, please contact Zibo Xiangrun Environmental Engineering Co., Ltd., a professional alumina manufacturer.
