RESEARCH WATER TREATMENT ABILITY OF OUTDOOR AQUARIUM BY CONSTRUCTED WETLANDS

Abstract

This report presents the initial results about capacity of using constructed wetlands to treat water of outdoor aquarium. The experimental model includes an outdoor aquarium (0.7 x 0.3 x 0.4)m, a constructed wetland (0.67 x 0.25 x 0.38)m, a wastewater tank (0.4 x 0.2 x 0.33)m. The model was operated for 30 days, aquariums had 07 goldfish, 5-7 cm long. Water flow into constructed wetland was 12 l/d and water retention time was 1 day. The result indicated that fish was always healthy, water in aquarium was maintained with good quality, reaching QCVN 38:2011/BTN&MT on water quality regulation to protect aquatic life. The values of pH, DO, TSS, NH₄⁺-N of water in aquarium were 7.1-7.4; 5.2-5.9 mg/l; 16-27 mg/l; 0.61-0.76 mg/l respectively.