Assessment of enhanced phytoremediation of shrimp aquaculture wastewater by endophytic bacteria-inoculated floating treatment wetlands

International Aquatic Research

دوره 13، شماره 4، اسفند 2021، صفحه 253-260   

نوع مقاله: Original research

شناسه دیجیتال (DOI): 10.22034/iar.2021.1939004.1186

نویسندگان

Trung Quang Do^{* 1}؛ Anh The Luu¹؛ Thu Thi Tuyet Tran²؛ Tri Trong Nguyen³؛ Vien Van Dinh⁴

¹Central Institute for Natural Resources and Environmental Studies, Vietnam National University Ha Noi, 19 Le Thanh Tong, Hoan Kiem, Ha Noi, Vietnam

²University of Science, Vietnam National University Ha Noi, 334 Nguyen Trai, Thanh Xuan, Ha Noi, Vietnam

³Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam

⁴Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam

چکیده

In Vietnam, the major problem for the sustainability of the shrimp aquaculture industry is the management of shrimp aquaculture wastewater. A promising solution to remediate pollutants in shrimp aquaculture wastewater is to use floating treatment wetlands (FTWs) in combination with pollutant-degrading bacteria. Hence, this study aimed to evaluate the effect of inoculation of endophytic bacteria isolated from Man Trau grass on the remediation of shrimp aquaculture wastewater in FTWs vegetated with grass (Brachiaria mutica). The results showed that FTWs only vegetated with B. mutica removed organic and inorganic pollutants from shrimp aquaculture wastewater and a significant reduction was observed for total dissolved solids (TDS), chemical oxygen demand (COD), ammonium (NH4+-N), nitrate (NO3--N), and phosphate (PO43--P) with efficiency is 60, 71, 80, 65, and 73%, respectively. Interestingly, the efficiency removal was further improved by the inoculation of endophytic bacteria. The combination of plants and bacteria produced the highest removal of COD (73%), NH4+-N (96%), NO3—N (80%), PO43—P (81%), Cu (95.3), and Fe (93.4%). Moreover, the inoculated bacteria were validated their presence in water as well as in roots and shoots of the vegetated plant. In addition, the treated water output met the wastewater discharge standards of the World Health Organization. Therefore, the results suggest endophyte-assisted FTWs are a suitable approach for the remediation of shrimp aquaculture wastewater.

کلیدواژه‌ها

Brachiaria mutica؛ Shrimp aquaculture wastewater؛ FTW؛ Endophytic bacteria؛ Ammonium removal