Conference on Environmental Science and Technology

Fluoride pollution from industries such as semiconductors, metal processing, and ceramics poses risks to both human health and the environment (Qiu et. al, 2022). High fluoride levels in wastewater can harm aquatic life and contaminate drinking water sources. This study explores the use of the Fluidized-Bed Homogeneous Crystallization (FBHC) process to remove and recover fluoride from wastewater. Aluminum sulfate was used as a precipitant to promote the formation of cryolite granules, which can be reused in various industries. Building on the work of Quedi et al. (2024), this research replicates and extends their 10-day experiment, optimizing operational parameters such as fluoride-to-aluminum molar ratio (2:1), pH (4.0–5.0), and influent flow rate (8 mL/min). The study further validates the process using actual industrial wastewater over an extended 30-day period. Key performance metrics include fluoride removal efficiency (%FR) and crystallization ratio (%CR), which previously achieved 93% and 91%, respectively, under controlled conditions. Results indicate that the FBHC process consistently maintains fluoride removal above 90%, though efficiency varies when applied to real wastewater due to impurities and fluctuating conditions. Adjustments in flow rate and pH control improved stability over time. Findings support the FBHC process as a scalable and sustainable fluoride recovery method, contributing to circular economy practices by repurposing industrial waste while minimizing environmental impact. This study highlights the potential of FBHC as a sustainable fluoride recovery method, offering industries a practical solution for wastewater management. By recovering fluoride, industries can minimize environmental impact while promoting resource reuse, contributing to circular economy practices and sustainable industrial operations.