Constructed wetland design for zero-discharge to purify recirculated wastewater from intensive tank culture of whiteleg shrimp in The Mekong Delta, Vietnam

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  • Ngo Thuy Diem Trang, Cantho University, Viet Nam
  • Dennis Konnerup
  • Vo Chi Linh, Can Tho University , Viet Nam
  • Lam Thi Nhu Mo, Can Tho University , Viet Nam
  • Luong Nuynh Thi Bich Tram, Can Tho University , Viet Nam
  • Le Nhat Duy, Can Tho University , Viet Nam
  • Hans Brix
Using constructed wetlands (CWs) for aquaculture wastewater treatment is a quite new technique in the Mekong Delta, Vietnam, where untreated aquaculture wastewater has been conventionally discharged into the rivers. The problem of poor water quality which causes illness in shrimp that has been recognized recently by local farmers. The aim of this study was to find an environmental friendly alternative method for sustainable shrimp production. A pilotscale
set-up consisting of a surface flow constructed wetlands planted Typha orientalis and Scirpus littoralis which was used as biofilter to purify recirculated wastewater from an intensive white leg shrimp (Litopenaeus vannamei) tank culture (Figure 1). The system was operated at a recirculation rate of 0.17 L/min (equivalent to 200% volume shrimp tank per day). Water quality in the shrimp tanks was monitored every two weeks. Mass balance method was used to quantify system performance, nitrogen and phosphorus storage in plant and water and nutrient removal mechanisms in each system. Water quality was stable over three months of feeding application. The system appeared to be a promising purification technique for sustainable shrimp production with zero-discharge.
Original languageEnglish
Publication year2018
Number of pages1
Publication statusPublished - 2018
Event8th International Fisheries Symposium: Sustainable fisheries and aquaculture for the benefits of mankind - Songkhla, Thailand
Duration: 18 Nov 201821 Nov 2018
Conference number: 8

Conference

Conference8th International Fisheries Symposium
Number8
CountryThailand
CitySongkhla
Period18/11/201821/11/2018

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