Ảnh hưởng của mật độ artemia tới khả năng xử lý chất hữu cơ có trong nước thải của sản xuất tôm giống và nuôi tôm thương phẩm

Abstract

    This paper presents some results of a study on Artemia's ability to treat organic matter in wastewater from shrimp seed production and shrimp farming. The analytical results of input factors showed that total suspended solid (TSS) in wastewater from shrimp seed production was higher than those of values given in QCVN 11: 2008/BTNMT from 1.3 times. Artemia had the ability to rapidly reduce organic matter content ≤ 50 μm in wastewater. After the experiment, the biochemical oxygen demand (BOD₅), chemical oxygen demand (COD), total suspended solid (TSS) met effl uent standards in 44/2010/TT-BNNPTNT and QCVN 11: 2008/BTNMT in all of the investigated plots. In wastewater from shrimp seed production, the concentration of BOD₅, COD and TSS were the lowest 5.6 ± 0.7 mg/l, 11.5 ± 1.2 mg/l and 8.6 ± 1.5 respectively, in the treatment of 300 individuals.l^-1. In wastewater from shrimp farming, TSS was lowest (6.0 ± 1.4 mg/l) in the treatment of 200 individuals.l^-1, BOD₅ and COD were lowest 3.5 ± 0.5 mg/l, 7.9 ± 1.4 mg/l, respectively, in the treatment of 300 individuals.l^-1.