Xử lý phenol trong nước thải bằng công nghệ sinh học ở quy mô phòng thí nghiệm=Phenol biological treatment in wastewater by laboratory scale

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Tác giả: Ngoc Thuan Le, Thi Mai Vu

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.128

Bộ sưu tập: Metadata

ID: 485192

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Các thí nghiệm trong nghiên cứu này sử dụng thiết bị xử lý bùn hoạt tính hiếu khí để nghiên cứu quá trình loại bỏ phenol và formaldehyde khỏi nước thải ở quy mô phòng thí nghiệm. Một mô-đun xử lý với bùn hoạt tính có thể tích 70 L, giai đoạn khởi động với thời gian lưu thủy lực là 10 giờ, giá trị pH trong khoảng 6,8-7, DO trong ngăn thiếu khí luôn nhỏ hơn 0,5 mg/L, trong ngăn hiếu khí trong khoảng giá trị 3,0 và 4,5 mg/L. Kết quả cho thấy bùn hoạt tính sau quá trình khởi động ở trạng thái ổn định với MLSS 2800 mg/L đến 3170 (mg/L), chỉ số thể tích bùn (SVI30) là 156,7 ml/g và bùn hoạt tính cho thấy khả năng lắng tốt. Phenol trong nước thải đầu vào dưới 200 mg/L, hiệu suất loại bỏ của thiết bị xử lý bùn hoạt tính rất tốt, hầu như toàn bộ phenol đều được loại bỏ khỏi nước thải. Khi xử lý nước thải bằng hỗn hợpphenol và formaldehyde, hiệu suất xử lý giảm khi tăng nồng độ chất ô nhiễm, ở nồng độ 300 mg/L formaldehyde và phenol, chỉ có 82,36% và 72,63% tương ứng được loại bỏ. Công nghệ sinh học với bùn hoạt tính có thể được sử dụng để xử lý phenol và formaldehyde trong nước thải công nghiệp. Từ khóa: Thiết bị xử lý sinh học
bùn hoạt tính
nước thải công nghiệp
xử lý phenol.Experiments used an aerobic-activated sludge reactor to investigate the removal of phenol and formaldehyde from wastewater on a laboratory scale. An activated sludge reactor module with a volume of 70 L, starts up with 10 hours of hydraulic retention time pH value in the range of 6.8-7, the DO in the anoxic compartment is always less than 0.5 mg/L, in the aerobic compartment between the values of 3.0 and 4.5 mg / L. The results showed that the activated sludge after the start-up process was stable with MLSS 2800 mg/L to 3170 (mg/L), sludge volume index (SVI30) was 156.7 ml/g, and activated sludge showed good sedimentation ability. Phenol in influent less than 200 mg/L, the removal performance of activated sludge reactor is very good, almost all phenol is removed from the wastewater. When treating wastewater with a mixture of phenol and formaldehyde, there is a reduction in treatment efficiency when increasing the pollutant concentration, at a concentration of 300 mg/L of formaldehyde and phenol, only 82.36%. and 72.63% respectively is eliminated. Activated sludge reactor can be used to treat industrial phenol and formaldehyde-containing wastewater. Keywords: Activated sludge reactor
industrial wastewater
phenol removal

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