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Removal Performance of Nitrogen and Emerging Contaminants in Full-Scale Constructed Wetlands: Case study from Thailand, Japan, and the USA |
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| รหัสดีโอไอ | |
| Creator | Pongsak (Lek) Noophan |
| Title | Removal Performance of Nitrogen and Emerging Contaminants in Full-Scale Constructed Wetlands: Case study from Thailand, Japan, and the USA |
| Contributor | Jidapa Plaimart, Supaporn Phanwila, Tharinee Saleepoch, Tamao Kasahar, Pongsak (Lek) Noophan, Kasem Chunkao |
| Publisher | Thai Society of Higher Education Institutes on Environment |
| Publication Year | 2569 |
| Journal Title | EnvironmentAsia |
| Journal Vol. | 19 |
| Journal No. | 1 |
| Page no. | 76-84 |
| Keyword | Treated effluent, Wetland, Thailand, Japan, USA |
| URL Website | http://www.tshe.org/ea/index.html |
| Website title | EnvironmentAsia |
| ISSN | 1906-1714 |
| Abstract | Water reclamation can be a promising solution for areas facing water scarcity. However, the reclaimed water must meet high quality standards to protect health and ensure safety for use. In this work, three full-scale wetlands - the Laem Phak Bia Environmental Study and Development Project’s wetlands, Phetchaburi Province, Thailand; Fukuoka, Japan; and Tucson, Arizona, United States of America - were studied for bacteria communities involved in the nitrogen cycle and the wetland’s treatment performance on chemical pollutant removal including contaminants of emerging concern (CECs).Quantitative polymerase chain reaction (qPCR) was used to quantify anammox bacteria in the sediments and plant root of the three wetlands. High quantity of anammox bacteria (105 copy/g-sediment and 105 copy/g-wet root) were found in the sediment and plant roots of the Thailand and USA wetlands. Polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) was used to identify microbial communities of ammonia-oxidizing bacteria (AOB), nitrite-oxidizing bacteria (NOB), denitrifying bacteria (DNB), and other bacteria from sediment and biofilm on plant roots of the Thailand and USA wetlands. The results suggested that biofilm on plant roots might play a crucial role in supporting partial nitritation and the anammox process in the wetlands. Only the USA wetland was investigated for concentrations of the following: CECs:perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), perfluorohexanoic acid (PFHxA), perfluorohexanesulfonic acid (PFHxS), and perfluorobutanesulfonic acid (PFBS). They were detected in theinfluent and effluent of the wetland, but their concentrations were below the U.S. guidelinelevels. The findings showed that the Thailand and USA wetlands removed nitrogen pollutantsefficiently in the low biochemical oxygen demand (BOD) condition. Therefore, they can beeffectively used to treat wastewater with low BOD but high nitrogen content. Overall, thetreated effluent from these wetlands appears suitable for water reclamation. |
