NGHIÊN CỨU KHẢ NĂNG XỬ LÝ CHẤT Ô NHIỄM HỮU CƠ TRONG NƯỚC THẢI NUÔI LƯƠN CỦA CÂY RAU NGỔ (Enydra fluctuans Lour)

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Tác giả: Thị Bích Huyền Dương, Ngọc Hạnh Trần, Thị Diễm Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2022

Mô tả vật lý: tr.165-172

Bộ sưu tập: Báo, Tạp chí

ID: 332423

Thêm vào giỏ Liên kết toàn văn

Sử dụng thực vật thủy sinh để xử lý nước thải nuôi trồng thủy sản là một trong những phương pháp hiệu quả để bảo vệ nguồn nước và môi trường. Trong nghiên cứu này, rau ngổ (Enydra fluctuans Lour) được chọn để xử lý nước thải có chiều cao trung bình khoảng 10 cm, trồng trong mô hình (thùng xốp) có mật độ 100 cây/m2. Kết quả nghiên cứu cho thấy rau ngổ thích nghi và phát triển tốt trong môi trường nước thải nuôi lươn được đặc trưng bởi sự gia tăng các chỉ tiêu về sinh khối. Kết quả đạt được qua thí nghiệm như sau: Mật độ và sinh khối trung bình của rau ngổ tăng lần lượt là 1,69 lần và 4 lần sau 20 ngày thí nghiệm. pH nước thải sau xử lý dao động từ 7 ÷ 8. Tổng chất rắn lơ lửng (TSS) của nước thải sau xử lý giảm khoảng 78%. Nồng độ COD của nước thải sau xử lý giảm khoảng 66 ÷ 72%. Kết quả này đã khẳng định, hoàn toàn có thể sử dụng rau ngổ để xử lý chất hữu cơ trong nước thải nuôi lươn.Using aquatic plant to treat aquaculture wastewater is one of the effective methods to protect water resources and the environment. In this study, enydra fluctuans lour selected for wastewater treatment has an average height of 10 cm, grown in a model (styrofoam box) with a density of 100 trees/m2. The research results showed that enydra fluctuans lour could adapt and grow well in the eel farming wastewater, which was characterized by an increase in biomass parameters. The results were reached via experiment as follows: The average density and biomass of enydra fluctuans lour were increased by 1.69 times and 4 times, respectively, after 20 days of experiment. The pH of wastewater after treatment was ranged from 7 to 8. Total suspended solids (TSS) of wastewater after treatment was reduced by about 78%. COD concentration of wastewater after treatment was decreased from 66 to 72%. This result was confirmed, it is possible to use enydra fluctuans lour to treat organic matter in wastewater from eel farming.

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