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Summary of SBR Process

Abstract: Sequencing Batch Reactor (SBR-Sequencing Batch Reactor) as early as 1914 to a British scholar Ardern and Locket invented the water treatment process. Early 70s, the United States Natre Dame University Professor R. Irvine on the laboratory scale SBR process using a systematic in-depth study, and in 1980 in the United States Environmental Protection Agency (EPA) under the auspices of the Culwer in Indiana and the city rebuilt SBR production of the world's first wastewater treatment plant. SBR process is the process to run according to timing, one operation in five phases: fill, reaction, settling, decanting the water, idle. Keywords: SBR process Sequencing Batch Reactor (SBR-Sequencing Batch Reactor) is up by early 1914 British scholar Ardern and Locket invented the water treatment process. Early 70s, the United States Natre Dame University Professor R. Irvine on the laboratory scale SBR process using a systematic in-depth study, and in 1980 in the United States Environmental Protection Agency (EPA) under the auspices of the Culwer in Indiana and the city rebuilt SBR production of the world's first wastewater treatment plant. SBR process is the process to run according to timing, one operation in five phases: fill, reaction, settling, decanting the water, idle. Running the SBR process, the running time of each stage,[link widoczny dla zalogowanych], the volume of the reactor mixture and running so you can change depending on the nature of the sewage, water quality, water quality, flexibility and operational changes in functional requirements. For the SBR reactor is only a timing control, space control barriers, so it can be flexibly controlled. Thus, SBR technology fast development, and derived from many kinds of new SBR treatment process. Intermittent aeration cycle delay <LABEL class=lb onclick=University of New South Wales developed in partnership with the United States ABJ's. 1976, the world's first wastewater treatment plant put into operation ICEAS process. Compared with the traditional SBR ICEAS, the most important feature: in the reactor inlet side set up a pre-reaction zone, the entire water treatment process is continuous, intermittent drainage, no idle phase of the response stage and therefore lower treatment costs than conventional SBR. Since the whole process of continuous water, sediment dewatering stage is poor, limiting the amount of water. Intermittent <LABEL class=lb onclick=A proposed new hospital SBR process. The main structure is a pool of DAT pools and intermittent aerobic <LABEL class=lb onclick=lb onclick = At the same time, IAT pool sludge return DAT pool. It has a strong impact characteristics, and nitrogen and phosphorus removal capabilities. Cyclic Activated Sludge (CASS-Cyclic Activated Sludge System) is a professor in the ICEAS Gotonszy developed on the basis of technology, is a new form of SBR process. The pre-reaction zone ICEAS with a capacity smaller, more rational design of optimized biological selector instead. CASS pool is usually divided into three response areas: biological selector, anoxic zone and aerobic zone, the volume than the average for the 1:5:30. Intermittent operation throughout the process, while <LABEL class=lb onclick=The treatment system has the function of nitrogen removal dephosphorization. UNITANK cell pool activated sludge treatment system proposed by the Belgian SEGHERS company, which is a variant of another SBR process. It combines the SBR process and the characteristics of oxidation ditch process, integrated design allows continuous water continuously throughout the water system, and a single pond water is relatively intermittent intermittent drainage. This system can be flexible time and space control, the appropriate hydraulic retention time increases, sewage nitrogen and phosphorus removal can be achieved. Modified Sequencing Batch Reactor (MSBR-Modified Sequencing Batch Reactor) is a C, Y. Yang, who according to technical characteristics of SBR with A2-O technology, research and development of a more ideal treatment system. Single cell multi-grid method, in continuous operation under constant water level. Usually divided into the main pool MSBR <LABEL class=lb onclick=B, oxygen tanks, slurry separation pool. Each cycle is divided into six sessions, each three hours for a half-cycle. The operational status of a semi-cycle: A pool of water first enters the anaerobic denitrification, re-entering the anaerobic tank B and phosphorus, into the main pool aerobic treatment, and then enter the batch pool, two pools alternating batch run (anoxic - aerobic / precipitation - water). More nitrogen and phosphorus removal capacity. SBR technology advantages 1, the ideal plug flow process driven biochemical reactions that increase efficiency, pool anaerobic, aerobic state in turn, purifying effect. 2, are stable operation, the sewage in an ideal state of precipitation still requires a short time, high efficiency, good water quality. 3, resistance to shock loading, water treatment tanks are stranded on the water with dilution, buffering, effectively resist the impact of water and organic contaminants. 4, each process in the process according to water quality, quantity adjustments, flexible operation. 5, processing equipment, small, simple structure, easy operation and maintenance management. 6, reaction tanks there DO, BOD5 concentration gradient, effective control of activated sludge expansion. 7, SBR law system itself is also suitable for combined construction method, which will help wastewater treatment plant expansion and renovation. 8, nitrogen and phosphorus removal, proper control operation mode to achieve aerobic, anoxic, anaerobic state of alternating nitrogen and phosphorus removal with good results. 9, process is simple and low cost. The main equipment is only one batch sequencing batch reactor, goes for the settling tank, sludge return system, regulation pool, primary sedimentation tank can be omitted, compact layout, covers an area of province. SBR system, the scope of the technical characteristics of the , SBR system, further broadening the use of activated sludge. Technical conditions for the recent, SBR system is more suitable for the following conditions: 1) small urban sewage and industrial enterprises of the industrial wastewater, especially in large intermittent changes in emissions and traffic areas. 2) require high water quality in places such as scenic spots, lakes and harbors, not only to remove organic matter, phosphorus and nitrogen removal also requires the water to prevent the eutrophication of rivers and lakes. 3) water shortage areas. SBR biological treatment system can be physico-chemical treatment, no additional facilities, to facilitate water recycling. 4) shortage of land areas. 5) built a continuous flow of the sewage treatment plant transformation. 6) is very suitable for handling small amount of water, intermittent discharge of industrial wastewater and distributed point source pollution control. SBR design elements, design features of the main parameters SBR 1, operating cycle (T) to determine SBR operating cycle from water-filled time, reaction time, settling time, drainage time and the mud idle time to determine. Water filling time (tv) should have an optimal value. As mentioned above, water-filled time should be based on specific water and used during the operation of the aeration <LABEL class=lb onclick=When using a limited <LABEL class=lb onclick=non-limited <LABEL class=lb onclick=Water-filled time normally take 1 ~ 4h. Reaction time (tR) is to determine the volume of SBR reactor is a very key process design parameters, the determination of its value also depends on the nature of the sewage during the operation of the reactor in the sludge concentration and <LABEL class = lb onclick = g ('aeration aeration');Class is easy for sewage wastewater treatment, can take a shorter reaction time, whereas refractory material containing toxic substances or waste water, the reaction time may be appropriate to take longer. Usually 2 ~ 8h. Precipitation drainage time (tS + D) by 2 ~ 4h general design. Idle time (tE) 2h general by design. A cycle time tC ≥ tRtStD, cycles n24/tC 2, the calculation of reactor volume of sewage assumed amount of each series of q, in each cycle into the reactor effluent volume q / n · N. The volume of each reactor: V: The capacity of each reactor 1 / m: discharge than n: number of cycles (cycles / d) N: the number of each series of reaction cell q: each series of sewage into the water (design maximum daily wastewater volume) (m3 / d) 3, System sequencing batch activated sludge, <LABEL class=lb onclick=class = lb onclick = kgBOD, low load operation when 1.5 ~ 2.5kgO2/kgBOD. In sequencing batch activated sludge, since the tanks were in the same reaction <LABEL class=lb onclick=<LABEL class=lb onclick=Common <LABEL class=lb onclick=aeration aeration');lb onclick = have a mixed effect, while avoiding congestion. 4, the drainage system ⑴ supernatant was excluded from the device should be able to set the drainage time, the activated sludge floating in the situation does not occur supernatant discharge, discharge methods are gravity discharge and pump discharge. ⑵ supernatant discharge device for the prevention of failure, an accident with a drainage system should be set. ⑶ discharge device in the supernatant should be equipped with anti-scum out of the body. Sequencing batch activated sludge discharge device in the drainage of precipitation, activated sludge to be discharged and the supernatant separated, and have the following characteristics: 1) should be neither disturbed the settled sludge, the sludge will not go up, according to the provisions of the flow discharge supernatant. (Quantitative drainage) 2) to obtain the clear treated water after the separation, should be as close to the surface of the water catchment agencies, and with the supernatant after discharge drainage water level changes. (Follow the water level of performance)