Plastic, paper, metal, and e-waste recycling facilities each generate distinct pollutant profiles. Compliance with Vietnam’s 2020 Law on Environmental Protection and relevant QCVN standards requires pollutant-specific treatment strategies.
1. Pollution Sources by Recycling Type
Plastic Recycling
- VOCs (xylene, benzene, styrene) released during melting and pelletizing
- Odor from mixed plastics (polyolefin, ABS, PVC)
- Fine plastic dust generated during grinding
Paper / Carton Recycling
- Paper dust and cellulose fibers, a respiratory irritant
- Odor from residual ink and bleaching chemicals
- High humidity during wet processing
Metal Recycling
- Heavy metal dust (lead, zinc, copper, cadmium) from grinding and sorting
- Smoke and metal oxides from electric arc furnace (EAF) melting
- Coarse dust and noise from cutting and pressing
E-Waste Recycling
- Precious metals (gold, silver, palladium) and toxic metals (lead, mercury, cadmium)
- Brominated flame retardant compounds
- Dioxin and furan risk from improper thermal processing
2. Solutions by Pollutant Type
Dust Control
- Cyclone Separator: coarse particles >10 microns, low pressure drop, used as a pre-treatment stage
- Bag Filter House: >99% efficiency for particles >1 micron, suited to metal and plastic dust
- Cartridge Dust Collector: compact, for dry dust in limited-space installations
- Wet Scrubber: for dust combined with acid gases such as HCl and SO2, used in battery and chemical recycling
VOC and Odor Control
- Activated carbon filters for VOC and odor adsorption
- KMnO4 chemisorption media, oxidizing H2S, mercaptans, and aldehydes
- Thermal Oxidizer (TO/RTO), operating at 800–1000°C for high-concentration VOC streams
- UV photolysis, breaking down odor molecules with UV-C light for large airflow applications
3. Vietnamese Environmental Regulations
- QCVN 19:2009/BTNMT — industrial dust and inorganic emissions
- QCVN 20:2009/BTNMT — organic compound emissions
- QCVN 30:2012/BTNMT — industrial waste incinerator emissions
- Periodic environmental monitoring per Decree 08/2022/NĐ-CP
4. Air Filtech Recycling Industry Solutions
- Pulse-Jet PJ Series Bag Filters with automatic cleaning for metal and plastic dust
- Activated carbon modules installed after cyclone or bag filter stages for VOC and odor control
- Chemisorption media (KMnO4 + activated carbon) for H2S, mercaptan, and odor compounds
- Compact cartridge dust collectors for small and medium sorting stations
- System design compliant with QCVN standards and support for environmental permit applications
5. Featured Projects
- Đông Tiến Recycling Company (Đồng Nai) — bag filter and activated carbon system for dust and odor on a PE/PP plastic recycling line
- Kim Tín Recycling Plant (Hậu Giang) — dust and metal fume filtration for an aluminum recycling furnace
- Sài Gòn Xanh E-Waste Recycling Facility (Ho Chi Minh City) — heavy metal dust and VOC treatment for an e-waste recycling line
Contact Air Filtech: 08 999 44 666 | info@airfiltech.vn
