Kartika Maylani (1), Budi Indra Setiawan (2), Satyanto Krido Saptomo (3)
The growing demand for efficient, water-conserving, and sustainable aquaculture systems has accelerated the development of recirculating aquaculture system (RAS) technology. Although RAS can reduce water use by 90–99% compared to conventional systems, challenges remain related to metabolic waste accumulation and energy requirements. Therefore, this study aims to: (1) evaluate the effects of water change (25% and 50%) and filtration on water quality and water use; (2) assess system performance based on energy consumption and operational costs; and (3) determine the most efficient configuration for grass carp (Ctenopharyngodon idella) culture. The study was conducted at the Terpadu Laboratory, IPB Dramaga Campus, Bogor, using a completely randomized design (CRD) with three treatments: 25% water change (WC25), 50% water change (WC50), and a filtration system without water change (FS). Water changes were applied when water quality parameters exceeded predefined thresholds. Water quality parameters (ammonia, nitrite, nitrate, temperature, dissolved oxygen, and pH) were monitored daily, while water use, energy consumption, and operational costs were recorded and analyzed. The filtration system (FS) was the most effective in maintaining water quality, reducing ammonia from 2.25 mg/L to 0.25 mg/L, nitrite from 0.15 mg/L to 0.01 mg/L, and nitrate from 80 mg/L to 25 mg/L. FS also demonstrated the highest water use efficiency, consuming only 5 m³/month with a water cost of IDR 30,055. Although energy consumption was slightly higher, FS resulted in the lowest total operational cost (IDR 969,667/month). The integration of a filtration system in RAS is more effective in maintaining water quality, reducing water consumption, and improving economic efficiency compared to water change strategies, making it a suitable approach for sustainable grass carp aquaculture
Professor-Civil and Environmental Engineering
[1] FAO. 2022. The State of World Fisheries and Aquaculture 2022. Towards Blue Transformation. Rome: FAO.
[2] Mardiana TY, Yahya MZ, Linayati L, Syakirin BM, Pratama H, Oktaviani N. 2024. Pemanfaatan daun Rhizophora mucronata sebagai feed additive untuk meningkatkan pertumbuhan udang Vannamei. J. Sains Akuakultur Trop. 8(2):177–184.
[3] Scroggins RE, Fry JP, Brown MT, Neff RA, Asche F, Anderson JL, Love DC. 2022. Renewable energy in fisheries and aquaculture: case studies from the United States. J. Clean. Prod. 376:134153.doi:10.1016/j.jclepro.2022.134153.
[4] Ahmed N, Turchini GM. 2021. Recirculating aquaculture systems (RAS): environmental solution and climate change adaptation. J. Clean. Prod. 297:126604.doi:10.1016/j.jclepro.2021.126604.
[5] Zhang R, Chen T, Wang Y, Short M. 2024. An optimisation approach for the design and operation of recirculating aquaculture systems integrated with sustainable hybrid energy systems. J. Clean. Prod. 477:143860.doi:10.1016/j.jclepro.2024.143860.
[6] Davidson J, Summerfelt S, Schrader KK, Good C. 2019. Integrating activated sludge membrane biological reactors with freshwater RAS: Preliminary evaluation of water use, water quality, and rainbow trout Oncorhynchus mykiss performance. Aquac. Eng. 87:1–27.doi:10.1016/j.aquaeng.2019.102022.
[7] Sandu SI, Boardman GD, Watten BJ, Brazil BL. 2002. Factors influencing the nitrification efficiency of fluidized bed filter with a plastic bead medium. Aquac. Eng. 26(1):41–59.doi:10.1016/S0144-8609(02)00003-1.
[8] Rasa U, Rebhung F, Tallo I. 2018. Pengaruh volume pergantian air media terhadap kelulushidupan larva ikan Lele Sangkuriang (Clarias gariepinus). J. AKUATIK. 1(1):18–23.
[9] Istiqomah DA, Suminto S, Harwanto D. 2018. Efek pergantian air dengan persentase berbeda terhadap kelulushidupan, efisiensi pemanfaatan pakan dan pertumbuhan benih monosex ikan Nila (Oreochromis niloticus). J. Aquac. Manag. Technol. 7(1):46–54.
[10] Hossain MM, Ali ML, Khan S, Haque MM, Shahjahan M. 2020. Use of asian watergrass as feed of Grass Carp. Aquac. Reports. 18:100434.doi:10.1016/j.aqrep.2020.100434.
[11] Babo D, Sampekalo J, Pangkey H. 2013. Pengaruh beberapa jenis pakan hijauan terhadap pertumbuhan Ikan Koan Stenopharyngodon idella. e-Journal Budid. Perair. 1(3):1–6.doi:10.35800/bdp.1.3.2013.2716.
[12] Koniyo Y. 2020. Analisis kualitas air pada lokasi budidaya ikan air tawar di Kecamatan Suwawa Tengah. J. Technopreneur. 8(1):52–58.doi:10.30869/jtech.v8i1.527.
[13] Yudiana IDGT, Martini NND, Swasta IBJ. 2022. Studi perbandingan kualitas air dengan sistem resirkulasi yang berbeda pada parameter uji amonia, nitrit dan nitrat. J. Pendidik. Tambusai. 6(2):12123–12130.
[14] Putra I, Effendi I, Lukistyowati I, Tang UM, Fauzi M, Suharman I, Muchlisin ZA. 2020. Effect of different biofloc starters on ammonia, nitrate, and nitrite concentrations in the cultured Tilapia Oreochromis niloticus system. F1000Research. 9(293):1–13.doi:10.12688/f1000research.22977.3.
[15] Monsees H, Klatt L, Kloas W, Wuertz S. 2017. Chronic exposure to nitrate significantly reduces growth and affects the health status of juvenile Nile tilapia (Oreochromis niloticus L.) in recirculating aquaculture systems. Aquac. Res. 48(7):3482–3492.doi:10.1111/are.13174.