Hiệu quả xử lý chất hữu cơ trong quá trình nuôi bùn hạt hiếu khí

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Tác giả: Văn Doanh Phạm

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Môi trường, 2023

Mô tả vật lý: tr.19-22

Bộ sưu tập: Báo, Tạp chí

ID: 341181

Thêm vào giỏ Liên kết toàn văn

Growth and application of aerobic granulation in wastewater treatment has been in recent years in the World. Research on aerobic granules has greatly increased in number and quality. Research on the wastewater treatment efficiency of aerobic granular sludge has developed, especially research on the efficiency of wastewater treatment in the growth of aerobic. This essay describes the process of effectiveness of COD removal and Nitrification in growth of aerobic granulation with artificial wastewater, acetate is the main component at the laboratory in Viet Nam. The culture sludge is activated sludge taken from the conditioning tank of Yen So treatment. Research is carried out on the reactor SBR technology with 0,11 m in diameter and 1 m in height, working volume of 2,5 lit. The time of one cycle is 4 hours, each cycle is divided into 4 periods: 1 - 2 min of influent filling, 180 min of aeration, 20 - 30 min of settling and 10 - 15 min of effluent… The input wastewater is wastewater with high strength and has an OLR of 2,7 - 3,0 kg COD/m3.day, the time for research is 120 days. As a result, after 120 days COD removal is more than 90%, NH4+ - N removal is more than 80%.Nuôi cấy và ứng dụng thành công bùn hạt hiếu khí trong xử lý nước thải (XLNT) đã được thực hiện trên thế giới từ nhiều năm qua. Các đề tài nghiên cứu về lĩnh vực này phát triển cả về số lượng và chất lượng. Trong đó, nghiên cứu về hiệu quả xử lý cơ chất trong nước thải của bùn hạt hiếu khí phát triển mạnh mẽ, đặc biệt là nghiên cứu hiệu quả xử lý cơ chất trong quá trình nuôi bùn hạt hiếu khí. Bài báo trình bày hiệu quả xử lý COD và NH4+ - N trong quá trình hình thành và phát triển của bùn hạt hiếu trong điều kiện phòng thí nghiệm tại Việt Nam, với nước thải nhân tạo, chất nền là acetate, bùn nuôi cấy là bùn hoạt tính lấy từ bể điều hòa của Nhà máy XLNT Yên Sở. Nghiên cứu nuôi bùn hạt hiếu khí được thực hiện trên mô hình bể xử lý theo mẻ (SBR) có kích thước: Đường kính bể là 0,110m
chiều cao bể là 1 m
thể tích làm việc của bể là 2,5 lít. Một chu kỳ làm việc của bể là 4 giờ, trong 1 chu kỳ gồm 4 pha: Pha cấp nước vào, thời gian 1 - 2 phút
pha sục khí 180 phút
pha nghỉ 20 - 30 phút
pha xả 10 - 15 phút. Nước đầuvào cho mô hình là nước thải nhân tạo có tải trọng hữu cơ từ 2,7 - 3,0 kg COD/m3.ngày
Tổng thời gian thí nghiệm là 120 ngày. Kết quả cho thấy hiệu quả loại bỏ COD luôn lớn hơn 90%
hiệu quả loại bỏ NH4+ - N luôn lớn hơn 80%.

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