Investigation of a Farm-scale Multitrophic Recirculating Aquaculture System with the Addition of Rhodovulum sulfidophilum for Milkfish ( Chanos chanos ) Coastal Aquaculture

Bea-Ven Chang, Chien-Sen Liao, Yi-Tang Chang, Wei-Liang Chao, Shinn-Lih Yeh, Dong-Lin Kuo and Chu-Wen Yang
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Bea-Ven Chang: Department of Microbiology, Soochow University, Taipei 11101, Taiwan
Chien-Sen Liao: Department of Civil and Ecological Engineering, I Shou University, Kaohsiung 84001, Taiwan
Yi-Tang Chang: Department of Microbiology, Soochow University, Taipei 11101, Taiwan
Wei-Liang Chao: Department of Microbiology, Soochow University, Taipei 11101, Taiwan
Shinn-Lih Yeh: Mariculture Research Center, Fisheries Research Institute, Council of Agriculture, Tainan 72442, Taiwan
Dong-Lin Kuo: Department of Microbiology, Soochow University, Taipei 11101, Taiwan
Chu-Wen Yang: Department of Microbiology, Soochow University, Taipei 11101, Taiwan

Sustainability, 2019, vol. 11, issue 7, 1-15

Abstract: Globally, coastal aquaculture is growing due to the large demand for marine products. Specific impacts caused by coastal aquaculture on the environment include the discharge of culture farm effluents, stress on ground water (the absence of recycling), nutrient pollution, and diseases of cultured animals. Three methods, integrated multitrophic aquaculture (IMTA), recirculating aquaculture system (RAS), and beneficial bacteria for aquaculture, have been developed to solve these problems. In this study, the advantages of IMTA and RAS were integrated to develop a novel multitrophic recirculating aquaculture system (MRAS) to adapt to the farm-scale culturing of milkfish ( Chanos chanos ). The photosynthetic bacteria Rhodovulum sulfidophilum was added to enhance the performance of the farm-scale milkfish MRAS. This setting could promote growth of beneficial bacteria, such as the nitrogen cycle-associated microbial community and the anoxygenic phototrophic Acidobacteria community. The ammonia level was reduced, and the total phosphorous level was stable in the water recycled in the MRAS. The cyanobacteria, algae, Vibrio , Escherichia , and other potential pathogenic bacteria communities were inhibited in the MRAS. This study provides an effective design of a water recycling aquaculture system. Milkfish, Asian tiger shrimp ( Penaeus monodon ), Asian hard clam ( Meretrix lusoria ), and seaweed ( Gracilaria sp.) can be cultured and simultaneously produced in the system.

Keywords: multitrophic recirculating aquaculture system; coastal aquaculture; beneficial bacteria; nitrogen cycle (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
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