WASTEWATER TREATMENT Topic Sequency Batch Reactor (SBR) Lecturer 1 TRƯỜNG ĐẠI HỌC TÔN ĐỨC THẮNG KHOA MÔI TRƯỜNG VÀ BẢO HỘ LAO ĐỘNG 901031 XU LY NUOC THAI – 16032022 2901031 XU LY NUOC THAI – 16032022 CONTENT 1 • Vocabulary 2 • Introduction 3 • Operating Principles 3901031 XU LY NUOC THAI – 16032022 1 VOCABULARY Words Meaning 1 Sequency Batch Reactor Bể SBR 2 The aeration Sự sục khí 3 Anaerobic digesters Thiết bị phân hủy kỵ khí 4 Mechanical biological treatment Công trình xử lí sinh học 5.
TRƯỜNG ĐẠI HỌC TÔN ĐỨC THẮNG KHOA MÔI TRƯỜNG VÀ BẢO HỘ LAO ĐỘNG WASTEWATER TREATMENT Topic : Sequency Batch Reactor (SBR) Lecturer : 901031 - XU LY NUOC THAI – 16/03/2022 CONTENT • Vocabulary • Introduction • Operating Principles 901031 - XU LY NUOC THAI – 16/03/2022 VOCABULARY Words Sequency Batch Reactor The aeration Anaerobic digesters Mechanical biological treatment Reactor basin Waste sludge draw-off mechanism Aeration equipment Effluent decanter Process control system Meaning Bể SBR Sự sục khí Thiết bị phân hủy kỵ khí Cơng trình xử lí sinh học Bể phản ứng Cơ chế hút bùn thải Thiết bị sục khí Bình gạn nước thải Hệ thống kiểm sốt quy trình 901031 - XU LY NUOC THAI – 16/03/2022 VOCABULARY 10 11 12 Words Biochemical Oxygen Demand (BOD Chemical Oxygen Demand (COD) Supernatant Meaning Nhu cầu oxy sinh hóa Nhu cầu oxy hóa học Nổi bề mặt 13 Fill, React, Settle, Draw and Idle Làm đầy, Pha phản ứng, Lắng, Rút nước, Pha chờ 14 15 16 17 Microorganism Pollutants Batch Settlement Tanks Vi sinh vật Chất nhiễm Lị (phản ứng ) Bể lắng INTRODUCTION 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION • SBR is a batch reactor with activated sludge A special feature is that the aeration and settling processes take place in the same tank • Sequencing batch reactors (SBR) or sequential batch reactors are industrial processing tanks for the treatment of wastewater SBR reactors treat waste water such as sewage or output from anaerobic digesters or mechanical biological treatment facilities in batches Oxygen is bubbled through the waste water to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) to make suitable for discharge into sewers or for use on land • With the calculation of scientific SBR, this is the kind of work that provides high efficiency with superior advantages Wastewater after being processed becomes safe and cleaner 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION • The SBR system is a set of tanks that operate on a fill-and draw basis Each tank in the SBR system is filled during a discrete period of time and then operated as a batch reactor After desired treatment, the mixed liquor is allowed to settle and the clarified supernatant is then drawn from the tank The cycle for each tank in a typical SBR is divided into five discrete periods: Fill, React, Settle, Draw and Idle as shown in Fig 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION Technology feature: Use microorganism to biodegrade pollutants, all reaction steps occur in one tank only and treatment occurs as batch Advantages: • Automatic operation Reduce equipments of sedimentation tank.Sludge recirculation is not needed • Energy saving.The ability to treat wastewater with high concentrations of pollution, treat organic substances thoroughly Easy to control incidents 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION Disadvantages: • Requires a monitoring system of sophisticated, modern indicators • Difficult maintenance • Requires high - level operators Application: • To treat urban & domestic waste water, industrial zone wastewater • Large scale projects • Average area WWTP 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION Circular SBR tanks and Rectangular SBR tanks and aerobic digester tanks 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION Construction : • The SBR tank is composed of two tanks c – tech and selector When building an SBR tank needs to be meticulously designed and the most science • The wastewater will be processed at the selector in the selector tank then passes through the c – tech tank to handle the next 901031 - XU LY NUOC THAI – 16/03/2022 11 OPERATING PRINCIPLES SBR Process Configuration: The essential components of SBR’s are: • Reactor basin • Waste sludge draw-off mechanism • Aeration equipment • Effluent decanter • Process control system Settled sewage may also be treated if the SBR is installed downstream of existing primary settlement tanks Reactors are usually simple circular, square or rectangular tanks and may be constructed from concrete or steel 901031 - XU LY NUOC THAI – 16/03/2022 12 OPERATING PRINCIPLES SBR operation for each tank for one cycle for the five discrete time periods of Fill, React, Settle, Draw, and Idle 901031 - XU LY NUOC THAI – 16/03/2022 13 OPERATING PRINCIPLES • Fill - raw sewage or wastewater is filled into the SBR tank, can be mixed, or aerated • React - aeration process for the carbonanceous organic pollutant removal ( the time in React shall always be 1.5 h ) • Settle - settling of sludge after the react • Draw - the supernatant is decanted (withdrawn) from the tank for discharge or further treatment ( The time in Draw, should not be overly extended because of possible problems with rising sludge ) • Idle: The period between Draw and Fill is termed Idle This “idle” time can be used effectively to waste settled sludge More frequent sludge wasting programs are recommended to maintain process efficiency and sludge settling 901031 - XU LY NUOC THAI – 16/03/2022 14 THANK YOU FOR WATCHING 901031 - XU LY NUOC THAI – 16/03/2022 15 ... is that the aeration and settling processes take place in the same tank • Sequencing batch reactors (SBR) or sequential batch reactors are industrial processing tanks for the treatment of wastewater... Microorganism Pollutants Batch Settlement Tanks Vi sinh vật Chất nhiễm Lị (phản ứng ) Bể lắng INTRODUCTION 901031 - XU LY NUOC THAI – 16/03/2022 INTRODUCTION • SBR is a batch reactor with activated... Introduction • Operating Principles 901031 - XU LY NUOC THAI – 16/03/2022 VOCABULARY Words Sequency Batch Reactor The aeration Anaerobic digesters Mechanical biological treatment Reactor basin Waste