Tiếng ViệtTo build and operate a compliant domestic wastewater treatment plant, project owners must apply the current national technical regulations on effluent quality and engineering design standards. Below is a concise summary of the key regulatory and engineering frameworks in Vietnam.
1. National technical regulations on domestic wastewater quality
Depending on the composition of the wastewater and the classification of the receiving water body, appropriate biological and physicochemical treatment processes are selected so that discharged effluent meets current national environmental regulations:
QCVN 14:2025/BTNMT — National Technical Regulation on Domestic Wastewater and Urban/Concentrated Residential Wastewater (promulgated under Circular 05/2025/TT-BTNMT, effective September 1, 2025, replacing QCVN 14:2008/BTNMT).
- This regulation specifies the maximum permissible limits of pollution parameters (pH, BOD5, COD, TSS, Total Nitrogen, Total Phosphorus, Ammonium, Surfactants, Fats/Oils/Grease, Total Coliforms, etc.) in treated domestic wastewater discharged into receiving water sources across Columns A, B, and C.
- Transition roadmap: Existing facilities operating or approved before September 1, 2025 follow the transitional provisions through December 31, 2031; new investment projects from September 1, 2025 apply QCVN 14:2025/BTNMT directly.
Reference technological solutions meeting QCVN 14:2025/BTNMT: HASY Environment Domestic Wastewater Treatment Systems
2. Engineering design standards
When designing a wastewater treatment station to guarantee stable effluent compliance:
TCVN 7957:2008: Drainage and Sewerage — External Networks and Works — Design Standard
In TCVN 7957:2008, Section 8 — Wastewater Treatment Works, general engineering rules and sizing formulas are specified for standard treatment units (bar screens, grit chambers, equalization tanks, aerobic/anoxic biological reactors such as SBR, AO, MBBR, secondary clarifiers, and disinfection tanks).
Modern biological treatment technologies such as AO, MBBR, SBR, and MBR membrane filtration are engineered by HASY Environment to maximize nitrogen, ammonium, and organic removal while minimizing construction footprint, ensuring treated effluent consistently complies with QCVN 14:2025/BTNMT.
For technical consultation, site survey, and turnkey construction of domestic wastewater treatment systems, please contact HASY Environment via hotline 097 222 1608 or visit https://xulymoitruong360.com/en/.
