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Implementation of a constructed wetland for the sustainable treatment of inland shrimp farming water

Pham, Thi Thu Hang
•
Cochevelou, Vincent
•
Dinh, Hoang Dang Khoa
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December 9, 2020
Journal of Environmental Management

In the Mekong delta, inland-based shrimp breeding requires significant inflow of high-quality freshwater. In turn, discharge of substantial loads of poor-quality effluents negatively impacts adjacent water bodies and favors disease outbreaks. This project describes the implementation of a laboratory-based continuous closed recirculation aquaculture system composed of a constructed wetland (CW) with horizontal subsurface flow as a water treatment filter for mesohaline conditions, functioning under high loading rate (HLR = 1.54 m/d with HRT = 1.31 h). This CW was equipped of successive compartment dedicated to the successive elimination of the contaminants of interests. CW performance was measured over a complete growth cycle of the White-leg shrimps (Litopenaeus vannamei). Results showed that the designed system was pertinent, improving water quality of the shrimp culture substantially. Complete removal of nitrite was attained, with a concomitant reduction of respectively 78% and 76% of nitrate and COD. Bacteria enumeration tests showed that Vibrio sp. cells were fully removed, and that a 3 Log reduction was reached in total aerobic bacteria.

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1-s2.0-S0301479720317072-main.pdf

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http://purl.org/coar/version/c_970fb48d4fbd8a85

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openaccess

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CC BY-NC-ND

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1.81 MB

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075624f14aafe9eb992e33ab223911d4

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