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Articles | Sustainable Environmental Insight | Volume 2 - Issue 2 - 2025 | 113-123 | https://doi.org/10.53623/sein.v2i2.796
© 2025 by the author(s), and is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License Creative Commons Attribution 4.0 International (CC BY 4.0) License

Evaluation of the Treatment Performance Over Time of Constructed Wetlands for Wastewater from Rice Noodle Handicraft Village after Biogas Process

Author(s): Nguyen Van Thanh 1 ORCID https://orcid.org/0000-0002-0853-6497 , Pham Thuong Giang 2 , 3 , , Bui Thi Kim Anh 1 ORCID https://orcid.org/0000-0002-2145-6467 , Nguyen Thi Thu Thuy 4
Author(s) information:
1 Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hanoi, Vietnam
2 Faculty of Applied Sciences, University of Transport Technology, Hanoi, Vietnam
3 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
4 Institute of Tropical Biomedicine, Joint Vietnam-Russia Tropical Science and Technology Research Center, Hanoi, Vietnam

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Sustainable Environmental Insight

Volume 2 - Issue 2 - 2025

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Constructed wetlands (CWs) offer a low-cost and sustainable treatment option. However, their performance strongly depends on hydraulic retention time (HRT), which also influences land use and construction requirements. This study aimed to determine the minimum HRT required for treating wastewater from rice noodle handicraft villages after the biogas process to meet the National Technical Regulation on Industrial Wastewater (QCVN 40:2025/BTNMT), Column B. The CW system was set up in a glass tank (50 × 30 × 50 cm) with a 40 cm substrate layer consisting of yellow sand mixed with crushed stone, limestone (1 × 2 cm), and gravel (3 × 5 cm), and was planted with Cyperus alternifolius at a density of 18 plants per CW unit. The system was operated for 70 days with daily sampling. Results showed that effluent quality met QCVN 40:2025/BTNMT, Column B standards after 4 days, with average treatment efficiencies of 89.2% for total suspended solids (TSS), 82.4% for chemical oxygen demand (COD), 54.7% for total nitrogen (TN), and 78.1% for total phosphorus (TP). Although longer HRTs improved treatment efficiencies, removal rates plateaued after the fourth day. Therefore, a 4-day HRT is recommended as an optimal balance between treatment performance and construction cost. These findings provide practical implications for scaling up CW systems to improve wastewater management in Vietnamese handicraft villages.

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SUBMITTED: 08 August 2025
ACCEPTED: 07 September 2025
PUBLISHED: 10 September 2025
SUBMITTED to ACCEPTED: 30 days
DOI: https://doi.org/10.53623/sein.v2i2.796

Cite this article
Thanh, N. V., Thuong Giang, P., Anh, B. T. K., & Thuy, N. T. T. (2025). Evaluation of the Treatment Performance Over Time of Constructed Wetlands for Wastewater from Rice Noodle Handicraft Village after Biogas Process. Sustainable Environmental Insight, 2(2), 113–123. https://doi.org/10.53623/sein.v2i2.796
Keywords
Constructed wetland rice noodle handicraft village wastewater hydraulic retention time treatment performance
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