MÔ HÌNH SINH THÁI VÀ TIẾT KIỆM NĂNG LƯỢNG XỬ LÝ NƯỚC THẢI SINH HOẠT TẠI NGUỒN PHÂN TÁN

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Tác giả: Thị Hằng Nga Nguyễn, Thị Thu Trang Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Tài nguyên và Môi trường, 2022

Mô tả vật lý: tr.56-63

Bộ sưu tập: Metadata

ID: 333177

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Mô hình kỹ thuật sinh thái phối trộn các tầng đất là kỹ thuật bể lọc ngầm sử dụng vật liệu tự nhiên có nguồn gốc từ đất gồm khoáng sét, kết von đá ong,… làm chất hấp phụ ô nhiễm, trên bề mặt được phủ đất và trồng cỏ tự nhiên. Kỹ thuật có hiệu quả xử lý cao, hiệu suất xử lý N và P đạt 60 - 70 % do cơ chế yếm khí và hiếu khí trong các tầng đất. Nồng độ BOD5 và COD giảm đáng kể, đảm bảo đạt chất lượng theo QCVN 14-MT:2015/BTNMT cột B1. Kỹ thuật sử dụng hoàn toàn vật liệu tự nhiên, thân thiện với môi trường, chi phí vận hành thấp. Kỹ thuật này rất phù hợp với điều kiện của các hộ gia đình, cơ quan, trường học, nhà hàng và khách sạn,... để xử lý nước thải bảo vệ môi trường, kỹ thuật được áp dụng cho các đối tượng phân tán sẽ giảm tải công suất xử lý của các công trình XLNT tập trung.The ecological engineering model of mixing soil layers is an underground filter tank technique that uses natural materials derived from soil (i.e., clay minerals, laterite cinders, etc.) as pollutant adsorbents. The surface of the tank is covered with soil and planted with natural grasses. The technique had high treatment efficiency, with N and P treatment efficiency of 60 - 70 %, due to anaerobic and aerobic mechanisms in the soil layers. The concentration of BOD5 and COD were significantly reduced, ensuring the quality according to QCVN 14-MT:2015/BTNMT column B1. The technique uses completely natural materials, environmentally friendly and low operating costs. This technique is very suitable for households, agencies, schools, restaurants and hotels,... to treat wastewater in order to protect the environment. The technique applied to decentralised sources will reduce the operation capacity of centralised wastewater treatment plants.

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