Đánh giá diễn biến chất lượng nước sông Sài Gòn - Đồng Nai dưới ảnh hưởng sự cố xả thải nước thải sinh hoạt

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Nguyên Khôi Đào, Hoàng Anh Lê, Phước Thạch Thảo Nguyễn, Thị Diễm Thúy Nguyễn, Thông Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại: 628.3 Sewage treatment and disposal

Thông tin xuất bản: Phát triển Khoa học và Công nghệ: Khoa học Trái đất và Môi trường (ĐHQG TP. Hồ Chí Minh), 2022

Mô tả vật lý: 468-483

Bộ sưu tập: Metadata

ID: 499237

Thêm vào giỏ

Nghiên cứu được thực hiện nhằm đánh giá hiện trạng và diễn biến chất lượng nước mặt với hai thông số BOD5 và DO dưới ảnh hưởng của hoạt động xả thải nước thải sinh hoạt vào mùa khô (tháng 04/2016) và mùa mưa (tháng 10/2016) tại các trạm bơm Hòa Phú trên sông Sài Gòn và trạm bơm Bình An, Hóa An trên sông Đồng Nai bằng mô hình MIKE 21FM với hai mô-đun HD và Ecolab. Kết quả mô phỏng hiện trạng chất lượng nước vào cả hai mùa cho thấy, chất lượng nước trên sông Đồng Nai tốt hơn so với sông Sài Gòn. Cụ thể, có sự ô nhiễm hữu cơ nhẹ tại trạm Hòa Phú và nồng độ BOD5, DO hầu hết đạt tiêu chuẩn so với cột A2 cho mục đích cấp nước sinh hoạt theo QCVN 08-MT:2015/BTNMT tại cả hai trạm Bình An và Hóa An trên sông Đồng Nai. Sau đó, nghiên cứu xây dựng các kịch bản xả thải từ nguồn thải sinh hoạt tại khu vực đông dân cư của Tp.Thủ Dầu Một, tỉnh Bình Dương thải ra sông Sài Gòn cách trạm bơm Hòa Phú khoảng 4 km và Tp. Biên Hòa tỉnh Đồng Nai thải ra sông Đồng Nai cách trạm bơm Hóa An khoảng 4,7 km và Bình An khoảng 5,3 km, lưu lượng thải lần lượt là 0,66 m3 /s và 2,15 m3 /s. Kết quả cho thấy, tại trạm Hòa Phú và Hóa An hầu như không bị ảnh hưởng, tại trạm bơm Bình An có sự ảnh hưởng rõ rệt vào mùa khô làm cho chất lượng nước tại đây không đạt tiêu chuẩn cột A2.The study was conducted to evaluate the impact of domestic wastewater discharges on surface water quality (BOD5 and DO) at pumping stations on Sai Gon - Dong Nai river during the dry season and the wet season using the MIKE 21FM model. The results indicated that the water quality in Dong Nai river is rated better than the Sai Gon River. Specifically, the BOD5 concentration was high, and the DO concentration was low at Hoa Phu station in Sai Gon River. However, the surface water quality at pumping stations on Dong Nai river, namely Hoa An and Binh An was up to standard compared to column A2 for domestic water supply purposes according to QCVN 08- MT:2015/BTNMT. Specifically, the wastewater source from Thu Dau Mot city on the Sai Gon river was about 4 km from Hoa Phu pumping station with a discharge volume of 0,66 m3 /s, and another source from Bien Hoa city on the Dong Nai river reached a discharge volume of 2,15 m3 /s, which was about 4.7 km and 5.5 km from Hoa An and Binh An intakes, respectively. The outcomes proved that Hoa Phu and Hoa An pumping stations were not affected by the wastewater from these cities. Otherwise, there was markedly degraded water quality at Binh An intake in the dry season, which was unsatisfied with QCVN 08- MT:2015/BTNMT (A2 type).

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