Bài viết Đánh giá hiệu quả xử lý thành phần hữu cơ, nitơ và photpho trong nước thải sử dụng bùn hạt hiếu khí trong bể phản ứng theo mẻ luân phiên trình bày kết quả đánh giá khả năng xử lý thành phần hữu cơ, nitơ và photpho trong nước thải khu công nghiệp Phú Bài bằng quá trình bùn hạt hiếu khí trong bể phản ứng theo mẻ luân phiên (Sequential Batch Reactor, SBR). | VNU Journal of Science Earth and Environmental Sciences Vol. 38 No. 2 2022 42-59 Original Article Assessment of the Removal Efficiency of Organic Matter Nitrogen and Phosphorus Using Aerobic Granular Sludge in Sequential Batch Reactor Tran Quang Loc Tran Thi Tu Nguyen Dang Hai Nguyen Quang Hung Tran Dang Bao Thuyen Dinh Thanh Kien Institute of Resources and Environment Hue University 7 Hanoi Phu Nhuan Hue City Thua Thien Hue Vietnam Received 02 November 2020 Revised 06 April 2021 Accepted 07 July 2021 Abstract This research demonstrates the assessment of the removal efficiency of organic matter nitrogen and phosphorus in wastewater of Phu Bai industrial zone using aerobic granular sludge process in sequential batch reactor SBR . The experiment was carried out in two SBR namely R1 and R2 with 240 minutes of cycle time and a two-stepwise aeration was applied including 90 minutes at airflow rate Q1 6 L min and 136 minutes at Q2 2 L min. However one-step feeding was used for R1 meanwhile 2-step feeding 75 of volumetric at the beginning of batch and 25 remaining after aeration time Q1 was applied for R2. The result showed that the size of sludge particle has increased from 1 to 2 mm and high biomass in Total Suspended Solid TSS of g L was retained in both reactors and sludge shows a good settling ability with a low SVI value of 40-42 mL g TSS after 50 days of operational experiment. It was indicated that aerobic granular sludge in R1 and R2 still maintained the development and stability during the operation. The removal efficiency of COD and N-NH4 removal in two reactors were similar and kept high at 92-93 and 96- 97 respectively while P-PO43- removal efficiency was just in the range of 68-80 . The simultaneous nitrification and denitrification process SND was achieved with two-stepwise aeration in both reactors. Additionally the experimental data showed the efficiency of SND in R2 85-87 was higher than that of R1 64-68 which demonstrated that the operating .
