Researchers from Khulna University of Engineering and Technology (KUET) in Bangladesh have developed a 3D printed honeycomb filter made to treat greywater from domestic sources.
The filter was produced on an Ultimaker FFF 3D printer, using virgin nylon filament blended with recycled material obtained by depolymerizing discarded nylon fabric, then coated with titanium dioxide nanoparticles. Nylon was selected for its chemical resistance, strength, and durability under repeated exposure to wastewater, making it more suitable than other common 3D printing materials such as PLA, ABS, or PETG.
Led by Sumit Kanti Saha from the Department of Textile Engineering, the project also saw contributions from Jashore University of Science and Technology. Published in Micro & Nano Letters, the work explores a low-cost, reusable option for non-potable water applications. While the results are promising, the team notes that further refinement is needed before the design could meet drinking water standards.
