Nghiên cứu hiệu quả xử lý chất hữu cơ của bùn hạt hiếu khí đối với nước thải đầu vào tại trạm xử lý nước thải đô thị

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Tác giả: VAN DOANH PHAM

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.98

Bộ sưu tập: Báo, Tạp chí

ID: 451257

Thêm vào giỏ Liên kết toàn văn

Nước thải đô thị tại Việt Nam hiện nay chưa được thu gom và xử lý hiệu quả. Theo báo cáo mới nhất của Bộ Xây dựng (2020) hiện tại mới có 10 ÷ 15% lưu lượng nước thải đô thị tại Việt Nam được thu gom và xử lý đạt tiêu chuẩn xả thải. Các công nghệ xử lý nước thải (XLNT) tại Việt Nam phổ biến như: công nghệ bùn hoạt tính truyền thống (CAS), công nghệ xử lý theo mẻ (SBR), công nghệ lọc nhỏ gọt (TF), công nghệ mương oxy hóa (OD), công nghệ bùn hoạt tính dính bám (MBBR), công nghệ màng lọc (MBR),... Ứng dụng bùn hạt hiếu khí để XLNT đô thị tại Việt Nam đang ở giai đoạn nghiên cứu trong phòng thí nghiệm và đạt được kết quả ban đầu rất tốt trong điều kiện tại Việt Nam. Trong nội dung bài báo này, trình bày kết quả nghiên cứu xử lý chất hữu cơ (COD và NH4+ - N) của việc sử dụng bùn hạt hiếu khí để XLNT tại trạm Trúc Bạch - Hà Nội quy mô phòng thí nghiệm. Nghiên cứu được thực hiện trên mô hình bể xử lý theo mẻ (SBR) có kích thước: đường kính bể là 0,110 (m), chiều cao bể là 1 (m), thể tích làm việc của bể là 4 (lít). Một chu kỳ làm việc của bể là 3 giờ, trong 1 chu kỳ gồm 4 pha: pha cấp nước vào có thời gian 2 (phút), pha sục khí 130 (phút), pha nghỉ 30 (phút), pha xả 15 (phút). Kết quả: hiệu quả loại bỏ COD luôn lớn hơn 90%
hiệu quả loại bỏ NH4+ - N luôn lớn hơn 75%. Từ khóa: Bùn hạt hiếu khí
hiệu quả xử lý chất hữu cơ
xử lý nước thải.Urban wastewater in Vietnam is currently not collected and treated effectively. According to the latest report of the Ministry of Construction (2020), currently only 10 ÷ 15% of urban wastewater flow in Vietnam is collected and treated to meet discharge standards. Popular wastewater treatment technologies in Vietnam include: activated sludge technology (CAS), sequencing batch reactor technology (SBR), Trickling Filter technology (TF), and oxidation ditch technology (OD), Moving bed bioreactor technology (MBBR), membrane bioreactor technology (MBR),... Application of aerobic granular sludge for urban wastewater treatment in Vietnam is at the laboratory research stage and has achieved results. The initial results were very good under the conditions in Vietnam. In this paper, present the results of research on organic mattertreatment (COD and NH4+ - N) using aerobic granular sludge for wastewater at Truc Bach treatment of Hanoi in a laboratory scale. The research was conducted on sequencing batch reactor (SBR) model with dimensions: tank diameter is 0.110 (m), height is 1 (m), working volume is 4 (liters). One working cycle is 3 hours, in a cycle consisting of 4 phases: water supply phase has 2 (minutes), aeration phase 130 (minutes), rest phase 30 (minutes), discharge phase 15 (minutes). Results: COD removal efficiency is always greater than 90%
NH4+ - N removal efficiency is always greater than 75%. Key word: Aerobic granular sludge
effective organic matter treatment
wastewater treatment.

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