On-site treatment of a motorway service area wastewater using a package sequencing batch reactor (SBR)

2005 ◽  
Vol 51 (10) ◽  
pp. 311-316 ◽  
Author(s):  
J. Del Solar ◽  
S. Hudson ◽  
T. Stephenson
Keyword(s):  
Biochemical Oxygen Demand ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Loading Rate ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Poor Performance ◽  
Service Area ◽  
Average Flow ◽  
Cycle Times

A sequencing batch reactor (SBR) treating the effluent of a motorway service station in the south of England situated on a major tourist route was investigated. Wastewater from the kitchens, toilets and washrooms facilities was collected from the areas on each side of the motorway for treatment on-site. The SBR was designed for a population equivalent (p.e.) of 500, assuming an average flow of 100 m3/d, influent biochemical oxygen demand (BOD) of 300 mg/l, and influent suspended solids (SS) of 300 mg/l. Influent monitoring over 8 weeks revealed that the average flow was only 65 m3/d and the average influent BOD and SS were 480 mg/l and 473 mg/l respectively. This corresponded to a high sludge loading rate (F:M) of 0.42 d−1 which accounted for poor performance. Therefore the cycle times were extended from 6 h to 7 h and effluent BOD improved from 79 to 27 mg/l.

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 Performance evaluation and upgrade options for existing sequencing batch reactor for nutrient removal

2019 ◽  
Vol 268 ◽  
pp. 06007
Author(s):  
Jahziel Lantin ◽  
Jeremy Ynnos Abenoja ◽  
Jason Ly ◽  
Cheenee Marie Castillones ◽  
Arnel Beltran ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Treatment Facility ◽  
Study Results ◽  
Hierarchy Process

Assessment and upgrade of existing sewage treatment plants (STPs) are necessary due to the revision of the existing effluent regulations which now monitors nutrients including ammonia, nitrate and phosphates. The aim of this study is the performance evaluation of four sequencing batch reactor (SBR) type of STP based on the following parameters: biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), nitrates, ammonia, phosphates and pH; and their potential upgrade based on the revised regulations stated in DAO 2016-08. Four sequencing batch reactor (SBR) type of STP were assessed for 12 weeks for this study. Results showed noncompliance with nutrient levels, thus upgrade is necessary. Analytical Hierarchy Process (AHP), a Multi-Criteria-Analysis (MCA) tool, was used to select the best option for upgrade among options that include (1) additional SBR tank, (2) diverting wastewater to another treatment facility, and (3) converting the SBR into membrane bioreactor (MBR). Considering the criterion for upgrade, option 2 was the most preferred decision followed by option 1 then option 3.

scholarly journals Sequencing batch reactor process for the removal of nitrogen from anaerobically treated domestic wastewater

2018 ◽  
Vol 77 (6) ◽  
pp. 1581-1590 ◽  
Author(s):  
L. Pelaz ◽  
A. Gómez ◽  
A. Letona ◽  
G. Garralón ◽  
M. Fdz-Polanco
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Anaerobic Treatment ◽  
Cycle Times ◽  
Working Volume ◽  
Nitrogen Ratio ◽  
Pre Treatment ◽  
Kjeldahl Nitrogen

Abstract This work presents the performance of a sequencing batch reactor (SBR) system used as a means of removing nitrogen from domestic wastewater containing a low chemical oxygen demand (COD) to nitrogen ratio due to pre-treatment with an anaerobic reactor. The aim of the work was to determine the feasibility of this system for the removal of nitrogen from the domestic wastewater. An SBR with a working volume of 5 L was investigated at different cycle times of 12, 8 and 6 h, at 18 °C. The efficiency of the SBR varied together with the duration of the cycle, where the optimum performance was seen in the 6 h cycle with the anoxic–aerobic–anoxic sequence. Due to the low quantity of organic matter present in the domestic wastewater after the anaerobic treatment, an additional supply of external carbon was necessary before the second anoxic stage. The removal efficiencies obtained were: 98% for total Kjeldahl nitrogen, 84% for total nitrogen and 77% for soluble COD. The reactor was thus shown to be viable, and it was concluded that this process may be successfully applied as a post-treatment for the removal of nitrogen from anaerobically treated domestic wastewater.

Biological Treatment of Poultry Slaughterhouse Wastewater by Using Different Fibers

2015 ◽  
Vol 802 ◽  
pp. 401-405 ◽  
Author(s):  
Nur Nasuha Ahmad Puat ◽  
Hamidi Abdul Aziz
Keyword(s):  
Biological Treatment ◽  
Room Temperature ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Slaughterhouse Wastewater ◽  
Average Percentage ◽  
Pollutant Concentrations ◽  
Overall Performance

This study evaluated the performance of sequencing batch reactor (SBR) with and without the fibers of poultry slaughterhouse wastewater (PSWW). The fibers act as attachment materials to the suspended solids, which are considered as pollutant in PSWW. PSWW contains high-pollutant concentrations. Experiments were conducted using two 60 L laboratory SBR reactors at room temperature (25 °C) and pH 7±0.5. The removal percentage of SBR with and without the fibers was compared in terms of chemical oxygen demand and biological oxygen demand. The removal percentage of SBR with fibers showed higher overall performance, which was approximately 90%. Meanwhile, the removal of SBR without fibers achieved an average percentage of about 70%, which was slightly lower compared with SBR reactor with fibers.

Cultivation of Aerobic Granular Sludge under Selective Pressure in a Sequencing Batch Reactor

2011 ◽  
Vol 255-260 ◽  
pp. 3037-3041 ◽  
Author(s):  
Kui Zu Su ◽  
Chang Wang ◽  
Hui Fang
Keyword(s):  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Settling Velocity ◽  
Selective Pressure ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Volume Index ◽  
Aerobic Granular Sludge ◽  
Granulation Process

Aerobic granules were cultivated in the sequencing batch reactor at 15-25°C, pH 7.0 ± 0.1. Settling time decreased from 5 minutes to 1 minute gradually. As increasing the chemical oxygen demand (COD) and NH3-N in influent, COD removal efficiency and mixed liquid suspended solids of the reactor increased. Sludge volume index decreased continuously for a few days and then stabilized at 22 ml g-1. Selective pressure induced by settling velocity was proved to play a crucial role in activated sludge granulation. Based on the continuously measured data, the granulation process was divided into three phases, granules namely initiating, developing and maturating.

Suitability of ozone pre-treatment for amoxicillin wastewater

2013 ◽  
Vol 68 (11) ◽  
pp. 2492-2496 ◽  
Author(s):  
O. Lefebvre ◽  
X. Shi ◽  
J. G. Tein ◽  
H. Y. Ng
Keyword(s):  
Biochemical Oxygen Demand ◽  
Biological Treatment ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Biological Degradation ◽  
Reactor Performance ◽  
Pharmaceutical Wastewater ◽  
Pre Treatment ◽  
By Products

This study deals with the ozonation of amoxicillin in real pharmaceutical wastewater and its efficacy as a pre-treatment, prior to biological degradation by a mixed culture of bacteria in a sequencing batch reactor (SBR). An ozone utilization of 0.27 g/g-COD (chemical oxygen demand) lowered the pH of the wastewater to 6.6, reduced the specific ultraviolet absorption by 43% and increased the biochemical oxygen demand (BOD) concentration by 37%. The BOD:COD ratio became equal to 0.89, making the ozonated wastewater seemingly suitable for biological treatment; however, when the ozonated effluent was fed to the SBR, the reactor performance degraded, an effect which was attributed to ozonation by-products. In conclusion, ozonation might not be a suitable pre-treatment for pharmaceutical wastewater containing amoxicillin, and biotreatment with properly acclimated biomass may be a better option for treatment of such pharmaceutical wastewater.

scholarly journals Adaption of Different Operation Strategies for a Sequencing Batch Reactor Plant Working at Seasonal Load Variations

2017 ◽  
Vol 1 (1) ◽  
pp. 12-16
Author(s):  
Alexandra Bercoff ◽  
Stig Morling
Keyword(s):  
Removal Efficiency ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Total N ◽  
Load Variations ◽  
Treatment Stage ◽  
Total P

A small SBR-plant (Sequencing Batch Reactor) operating at substantial load variations has been examined with respect to performance at changing load conditions. The plant serves a ski resort area about 200 km north of Stockholm. The plant has a capacity equivalent to 700 pe and a daily flow of 100 m3/d. The results have been examined closely both by a one year follow-up study of the plant performance and also by a Master Thesis. The analysis of the performance study demonstrates how flexible an intermittently operated biological reactor is in treating varying loads, but also indicates possible operational strategies. It is important to keep in mind that the inlet concentrations of the main pollutants far exceed the “normal” values in untreated municipal wastewater. This circumstance is mainly attributed to a new and concentrated sewer system. Thus the amounts of diluting water are very limited.The treatment chain is built up by a pre-treatment stage, a biological and chemical treatment stage in an SBR-reactor and a final polishing stage where the water passes a fine grade screening filter.The requirements set for effluent water by the Environmental Protection Division on the Environmental Testing Advisory Board at the Swedish Environmental Agency are:• BOD7 < 10 ppm;• Total P < 0.3 ppm;No formal requirements have been addressed for COD, suspended solids (SS) or nitrogen. However, these pollution indicators have also been examined during the follow-up session. Typical performance results during the intense period (ski season) were as follows: • BOD7 < 3 ppm, equivalent to a removal efficiency of around 99%;•COD < 40 ppm, equivalent to a removal efficiency of around 96 %;• SS < 5 ppm, equivalent to a removal efficiency of around 99 %;• Total P < 0.3 ppm, equivalent to a removal efficiency of around 98 %; and• Total N < 40 ppm, equivalent to a removal efficiency of around 77 %.Abbreviations: BOD7 means Biochemical Oxygen Demand measured during 7 days; COD means Chemical Oxygen Demand; SS means Suspended Solids, as captured on a filter with 0,45mm; SRT means Solids Residence Time.

Aeration and Water Hyacinths in Waste Stabilization Ponds

1987 ◽  
Vol 19 (12) ◽  
pp. 265-271
Author(s):  
P. R. Thomas ◽  
H. O. Phelps
Keyword(s):  
Biochemical Oxygen Demand ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Substantial Improvement ◽  
Additional Treatment ◽  
Coliform Bacteria ◽  
Effluent Quality ◽  
Stabilization Ponds ◽  
Water Hyacinths

The investigation was based on two facultative stabilization ponds initially designed to operate in parallel, and now receive wastewater in excess of their capacities from a fast expanding housing estate in the Caribbean Island of Trinidad. Because of the deterioration of the effluent quality relative to acceptable standards, an attempt was made to upgrade the ponds using water hyacinths at the early stages. However, from the results, it was clear that the introduction of water hyacinths in the test pond did not lead to any substantial improvement in the effluent because of the high loading on the pond. Therefore the ponds were modified to operate in series with surface aerators installed in the first pond. Initially, the effluent quality was monitored in terms of total suspended solids, volatile suspended solids, biochemical oxygen demand, faecal coliform bacteria, pH and dissolved oxygen with aeration in the first pond and no aquatic plants in the second pond. Although there was a significant improvement in the effluent quality, the values remained above the standards. As a result, water hyacinths were introduced in the second pond and the effluent quality monitored together with aeration in the first pond. The effluent quality improved with total suspended solids and biochemical oxygen demand values both as low as 10 mg/l in certain months, but additional treatment was needed to reduce faecal conforms.

Sign in / Sign up

Export Citation Format

Share Document