Phytoremediation of some freshwater aquatic ornamental plants to treat wastewater from Indonesian shortfin eel, Anguilla bicolor

Nutrient removal efficiency Phytoremediation Anguilla bicolor Recirculation

Authors

  • Hany Handajani
    handajani@umm.ac.id
    Department of Aquaculture, Faculty of Agriculture and Animal Science, University of Muhammadiyah Malang, Malang, East Java, 65144, Indonesia.
  • Widanarni Widanarni Aquaculture Science Department, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, West Java, Indonesia.
  • Tatag Budiardi Aquaculture Science Department, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, West Java, Indonesia.
  • Mia Setiawati Aquaculture Science Department, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, West Java, Indonesia.
  • Soni Andriawan Department of Aquaculture, Faculty of Agriculture and Animal Science, University of Muhammadiyah Malang, Malang, East Java, 65144, Indonesia.
April 18, 2026

Abstract: This study evaluated the ability of freshwater ornamental aquatic plants to treat wastewater from Anguilla bicolor culture and the effects on growth performance. Over 60 days, plants including Cryptocoryne beckettii, Bacopa serpyllifolia, Echinodorus amazonicus, Echinodorus palaefolius, and a control group were tested. The average weight of A. bicolor was 7.01±0.18 g, with a stocking density of 4 g L?¹. The A. bicolor were maintained in 48 L aquariums with a recirculating system, using aquatic plants as phytoremediators, in a semi-outdoor laboratory to ensure adequate light. The feed protein content was 45.30%, and feeding occurred three times daily. The results showed that the aquatic plants efficiently removed nutrients from the water. Echinodorus palaefolius was the most effective, removing 23.33% of total ammonia nitrogen (TAN), 33.25% nitrite, 47.40% nitrate, and 43.92% phosphate. This species also promoted the highest specific growth rate (1.14±0.10%), biomass (22.67±1.65 g), and physiological response in A. bicolor, with the lowest feed conversion ratio (1.97±0.17). In conclusion, Echinodorus palaefolius effectively improved water quality and growth performance in A. bicolor, demonstrating its potential as a phytoremediator for sustainable aquaculture.