Performance of Sequencing Batch Reactor Treating Sewage Using Two Stage Anoxic Aerobic

2020 ◽  
Vol 17 (2) ◽  
pp. 704-706
Author(s):  
M. I. Aida Isma ◽  
R. Ashvini ◽  
M. Munira
Keyword(s):  
Particle Size ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Two Stage ◽  
Reactor Unit ◽  
Idle Period ◽  
Ciliate Species ◽  
N Removal ◽  
Sludge Settleability

Sequencing batch reactor technology (SBR) is an increasingly popular reactor configuration because of flexibility of operation in the treatment of domestic wastewater. However, the combined two stage anoxic-aerobic for further nitrogen removal has not been explored further. This study aims to determine the performance efficiency of two-stage anoxic-aerobic using sequencing batch reactor. 10 L of SBR reactor was operated twice daily. The system was operated on a 500 minutes cycle with 10 minutes of feeding, 300 minutes for reacting, 60 minutes of sedimentation, 10 minutes of decanting and 120 minutes for an idle period. Effluent quality (chemical oxygen demand (COD), ammoniacal nitrogen (NH4–N), total suspended solids (TSS)), particle size and sludge settleability have been analyzed over a period of 35 days of operation. Results shows that the overall efficiencies for COD, TSS and NH4–N were 93.8%, 98.4 % and 85.9%, respectively. In the lab scale SBR reactor unit, the 2 h anoxic/1.5 h aerobic period resulted in good process performance with COD, NH4–N and TSS removal of 66.0%, 78.5% and 59.4 %, respectively. Increasing the length of anoxic up to 1 h did not enhance the NH4–N removal with 4.5% in anoxic phase and 7.2% in aerobic phase. Sludge settleability became poorer as the ciliate species becomes rich. The particle size of the sludge was observed to increase from 117.743 μm to 127.310 μm. It is recommended that the duration of combined anoxic/aerobic periods should be optimized to achieve maximum performance and nutrient removal.

PERFORMANCE OF INTEGRATED TWO STAGE ANOXIC-AEROBIC SEQUENCING BATCH REACTOR IN THE TREATMENT OF SEWAGE

2019 ◽  
Vol 1 (2) ◽  
pp. 69-71
Author(s):  
Aida Isma M.I. ◽  
Ashvini R. ◽  
Munira M.
Keyword(s):  
Particle Size ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Two Stage ◽  
Operating Period ◽  
Effluent Quality ◽  
N Removal ◽  
Removal Efficiencies ◽  
The Impact ◽  
Sludge Settleability

A 10 L SBR reactor was operated on a two cycles per day with total cycle time of 500 minutes. This study explored the impact of a 300 minute react period with alternating two stage anoxic-aerobic phases starting at 120 minutes to 30 minutes on effluent quality, sludge settleability and particle size distribution.The overall removal efficiencies for COD,  TSS and NH4-N were 93.8%, 98.4 % and 85.9%, respectively. The results indicated a good process performance with the first 2h anoxic/1.5 h aerobic period with removals of 66.0%, 78.5% and 59.4 % for COD, NH4-N and TSS removal respectively.The NH4-N removal was not enhanced although the anoxic period was lengthened by 1 h with low removal of 4.5 % and subsequent 7.2% of the second aerobic phase. There was an increase in the particle size of the sludge from 117.743μm to 127.310μm over an  operating period of 35 days.

scholarly journals Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

2017 ◽  
Vol 20 ◽  
pp. 207-216 ◽  
Author(s):  
Ali W. Alattabi ◽  
Clare B. Harris ◽  
Rafid M. Alkhaddar ◽  
Khalid S. Hashim ◽  
Montserrat Ortoneda-Pedrola ◽  
...  
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Two Stage ◽  
Sludge Settleability

Biological phosphorus removal at temperatures from 3 to 10 °C — a full-scale study of a sequencing batch reactor unit

1994 ◽  
Vol 21 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Stefan Marklund ◽  
Stig Morling
Keyword(s):  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Cold Climate ◽  
The Arctic ◽  
Biological Phosphorus Removal ◽  
Reactor Unit ◽  
Biological Phosphorus

Low temperature biological phosphorus removal technology was tested at a small village wastewater treatment plant near the Arctic circle. An aeration basin in a conventional activated sludge step was retrofitted to a sequencing batch reactor with a maximum volume of approximately 27 m3. The study period was November 1989 to June 1991. The wastewater temperature varied between 3 and 10 °C during one full year and was below 5 °C during approximately 240 days of the year. A total sequencing batch reactor cycle time of 6–12 hours produced a phosphorus reduction of 70–80%. During the same time, biochemical oxygen demand (BOD7) reductions varied between 70% and 90%. These reductions were achieved at supernatant suspended solid concentrations of 20–30 mg/L. Effluent soluble phosphorus concentrations were usually lower than 1.0 mg/L at water temperatures down to 5 °C. At 4 °C, a sharp increase to greater than 2.0 mg/L was evident. Supernatant soluble BOD7 was less than 8 mg/L and was found to be independent of temperature. Key words: biological wastewater phosphorus removal, sequencing batch reactor, cold climate.

Peranan BOD biosensor untuk proses optimasi pengolahan limbah sintetik di SBR

2019 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Lindawati Lindawati
Keyword(s):  
Biochemical Oxygen Demand ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand

Sebuah Sequencing Batch Reactor (SBR) digunakan untuk mengevaluasi peranan Biochemical Oxygen Demand (BOD) biosensor dalam proses optimasi proses pengolahan nutrien karbon, nitrogen dan fosfat. Hasil penelitian menunjukkan bahwa BOD biosensor dapat dipergunakan untuk penentuan karbon organik, sehingga reduksi siklus SBR dapat dilakukan dan efisiensi proses meningkat. Pola konsumsi karbon organik ditemukan dengan adanya ‘tanda diam’ pada fase anoksik/ anaerobik, di mana dari tanda ini, fase aerobik dapat segera dimulai. Reduksi durasi siklus SBR dari 8 jam menjadi 4 jam meningkatkan efiesiensi pengolahan C, N dan P yang meningkat pula (hampir dua kali lebih tinggi).

scholarly journals Dynamic control of nutrient-removal from industrial wastewater in a sequencing batch reactor, using common and low-cost online sensors

2015 ◽  
Vol 73 (4) ◽  
pp. 740-745 ◽  
Author(s):  
Jan Dries
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Industrial Wastewater ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Low Cost ◽  
Dynamic Control ◽  
Oxygen Demand ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

On-line control of the biological treatment process is an innovative tool to cope with variable concentrations of chemical oxygen demand and nutrients in industrial wastewater. In the present study we implemented a simple dynamic control strategy for nutrient-removal in a sequencing batch reactor (SBR) treating variable tank truck cleaning wastewater. The control system was based on derived signals from two low-cost and robust sensors that are very common in activated sludge plants, i.e. oxidation reduction potential (ORP) and dissolved oxygen. The amount of wastewater fed during anoxic filling phases, and the number of filling phases in the SBR cycle, were determined by the appearance of the ‘nitrate knee’ in the profile of the ORP. The phase length of the subsequent aerobic phases was controlled by the oxygen uptake rate measured online in the reactor. As a result, the sludge loading rate (F/M ratio), the volume exchange rate and the SBR cycle length adapted dynamically to the activity of the activated sludge and the actual characteristics of the wastewater, without affecting the final effluent quality.

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