- General objective: Successful fabrication of an air filtration apparatus utilizing the wet dust filtration method.
- Specific Objective: To successfully fabricate an air filtration unit with a capacity of 50-100 m3/hour, ensuring features to treat fine dust particles PM2.5 to a safe level (<50 µg/m3), organic volatile compound toluene (<300 mg/m3), and microorganisms (<25 colony forming units per petri dish placed for 10 minutes).

- Technological results:
+ The project has designed the working principles and constructed experimental models for various filtration stages: coarse dust filtration, odor-causing organic matter treatment, fine dust filtration, and bacteria eradication
+ The project has successfully designed and fabricated an air purifier with a capacity of 50-100 m3/hour, ensuring features to treat fine dust particles PM2.5 to a safe level (<50 µg/m3), organic volatile compound (toluene, <300 mg/m3), and microorganisms (<25 colony forming units per petri dish placed in an experimental box for 10 minutes).
- Theoretical results:
+ Two methods of fine dust processing were studied: using absorption towers and utilizing a system comprising venturi equipment and xyclon dust separators. Compared to the less effective absorption tower method, the approach employing wet-type filtration devices including venturi and xyclon dust separators proved to be more efficient in filtering fine PM2.5 dust and bacteria. Additionally, the combination of filtering fine PM2.5 dust, bacteria, and hazardous organic substances resulted in a multifunctional filtration device, enhancing its practical applicability.
+ The wet dust filtration method utilizing venturi and xyclon dust separators in this study demonstrates effective handling of fine dust particles smaller than 1 micrometer (PM1.0). This is a noteworthy outcome for the project, especially considering the selected method's industrial dust filtration applications for manufacturing air purifiers with small-scale filtration capacities.
+ Successful synthesis of a 0.5-micron PP filter core embedded with nano-silver antibacterial materials was achieved using a high-concentration silver nano solution of 1000 ppm. Stable nano-silver particles were affixed onto the PP filter core, with approximately 1000 mg of nano-silver content per PP core. The high concentration of nano-silver on the PP filter core, combined with the optimized operational principles of the wet filtration method, significantly contributed to the efficient removal of various airborne bacteria.
- Applied results:
+ The project applies to the production of an air purifier, used to address high levels of pollution, including dust, humidity, and bacteria. Hence, when employed in spaces with moderate areas and high pollution levels such as cement production plants, waste treatment facilities, or testing rooms for hazardous infectious agents transmitted through the air, the wet air filtration devices can effectively perform, thereby generating significant economic efficiency. 

- This study has improved upon the design (enhancing the venturi device in wet air filtration systems utilizing venturi and cyclone, incorporating additional misting nozzles), enhancing the efficiency of fine dust filtration combined with air bacterial treatment compared to known wet dust filtration devices.
- The combination of bacterial treatment via wet filtration devices and bacterial filtration mechanism utilizing a 0.5 micrometer PP filter aims at comprehensive bacterial treatment, mitigating bacterial recontamination.

- Patents (list):  01 Patent for the useful solution "Wet Air Cleaning System" has been granted.
- Scientific papers in referred journals (list): 01 article titled "Research on the capability of removing fine dust and bacteria in the air using improved wet air filtration devices" has been accepted for publication in the Vietnam Journal of Science and Technology.
- Technological products (describe in details: technical characteristics, place): 01 air purifier machine, placed in the Electrochemistry Department, Institute of Chemistry, Vietnam Academy of Science and Technology.
- Other products (if applicable): 01 design drawing document of an air purifier machine.