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Related Experiment Video

Updated: Jan 15, 2026

Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris

Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris

Published on: July 28, 2018

CFD Simulation of DAF processing for removal microplastic in different flotation solution.

Kwang Jun Kim¹, Chol Hyok Ji¹, Un Yong Paek¹

¹Institute of Nano Science and Technology, Kim Chaek University of Technology, Pyongyang, Democratic People's Republic of Korea.

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|October 15, 2025

Summary

This summary is machine-generated.

Dissolved air flotation (DAF) effectively removes microplastics from wastewater. Increasing NaCl concentration and pH during DAF treatment enhances microplastic removal efficiency, with NaCl concentration showing a greater impact.

Keywords:

computational fluid dynamics dissolved air flotation (DAF)microplastic population balance model (PBM)wastewater treatment

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Area of Science:

Environmental Science
Chemical Engineering
Water Treatment Technology

Background:

Microplastic pollution poses a significant threat to aquatic ecosystems and human health.
Effective removal of microplastics from various water sources is crucial for environmental protection.

Purpose of the Study:

To simulate and evaluate the effectiveness of dissolved air flotation (DAF) for microplastic removal from wastewater.
To investigate the impact of varying NaCl concentrations and pH levels on DAF performance for microplastic removal.

Main Methods:

Computational fluid dynamics (CFD) was employed to simulate the DAF process.
Microplastic particle behavior and microbubble dynamics were analyzed under different conditions.
Flotation performance was assessed by varying NaCl concentration (0-12 g/L) and pH (4-9).

Main Results:

CFD simulation results closely matched experimental data for particle and microbubble kinematics.
Microplastic removal efficiency by DAF increased with higher NaCl concentrations and pH values.
NaCl concentration demonstrated a more pronounced effect on flotation performance than pH.

Conclusions:

DAF is a viable method for removing microplastics from wastewater.
Optimizing NaCl concentration and pH can significantly enhance DAF efficiency for microplastic removal.
The findings offer valuable insights for designing industrial wastewater treatment systems to combat microplastic pollution.