A full-scale test of a biological nutrients removal system using the sequencing batch reactor activated sludge process

1997 ◽  
Vol 35 (1) ◽  
pp. 241-247 ◽  
Author(s):  
Y.-T. Rim ◽  
H.-J. Yang ◽  
C.-H. Yoon ◽  
Y.-S. Kim ◽  
J.-B. Seo ◽  
...  
Keyword(s):  
Removal Rate ◽  
Batch Reactor ◽  
Full Scale ◽  
Yield Coefficient ◽  
Effluent Quality ◽  
Conversion Rates ◽  
Scale Test ◽  
Removal Efficiencies ◽  
Operating Cycles ◽  
Removal System

A full-scale pilot plant using SBR process was experimented with an actual wastewater emanating from a recreational center. The main purpose of this investigation was to evaluate applicability in the field and process removal efficiencies in terms of BOD, SS, TN and TP and its corresponding kinetic parameters. It was found that removal efficiencies were comparable with results of other studies reported in the literature. BOD removal was observed to be 95% on average while SS removal to be 89% on average. Removal rate of nitrogen was 70% in terms of total nitrogen and that of phosphorus was 77% in terms of total phosphorus. Effluent concentrations were 7.3 mg/??? BOD, 10.4mg/??? SS, 13.6mg/??? TN and 0.9mg/??? TP. Effluent quality was maintained consistently stable by controlling decantation quantity and operating cycles. Denitrification/nitrification were accomplished during anaerobic/aerobic processes and the conversion rates were 4.5mg/kgMLSS/hr and 1.5mg/kgMLSS/hr, respectively. The sludge yield coefficient was 0.32 whereas sludge phosphorus luxury uptake was as high as 5.6wt% at the end of aerobic cycle. Microscopic examination revealed that microcytes that were observed predominantly in sludge were Vorticella, Epistilis, Aspidisca (protozoa) and Philodina (rotatoria). This experiment may prove that SBR process is one of the most promising technologies that can be employed to treat organic matter as well as nutrients in wastewaters that are generated from such sources as recreational facilities because of fluctuations of wastewaters in terms of quality and quantity.

scholarly journals Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

2019 ◽  
Vol 38 (3) ◽  
pp. 243
Author(s):  
Happy Mulyani ◽  
Gregorius Prima Indra Budianto ◽  
Margono Margono ◽  
Mujtahid Kaavessina
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Removal Rate ◽  
Batch Reactor ◽  
Cod Removal ◽  
Operation Condition ◽  
Effluent Quality ◽  
Aeration Time ◽  
Standard Quality ◽  
Cod Removal Rate

Industrial wastewater treatment using Sequencing Batch Reactor (SBR) can improve effluent quality at lower cost than that obtained by other biological treatment methods. Further optimization is still required to enhance effluent quality until it meets standard quality and to reduce the operating cost of treatment of high strength organic wastewater. The purpose of this research was to determine the effect of pretreatment (pH adjustment and prechlorination) and aeration time on effluent quality and COD removal rate in tapioca wastewater treatment using SBR. Pretreatment was done by (1) adjustment of tapioca wastewater pH to control (4.92), 7, and 8, and (2) tapioca wastewater prechlorination at pH 8 during hour using calcium hypochlorite in variation dosages 0, 2, 4, 6 mg/L Cl2, SBR operation was conducted according to following steps: (1) Filling of pre-treated wastewater into a bioreactor during 1 hour, and (2) aeration of the mixture of tapioca wastewater and activated sludge during 8 hours. Effluent sample was collected at every 2-hours aeration for COD analysis. COD removal rate mathematical formula was got by first deriving the best fit function between aeration time and COD. Optimum aeration time resulting in no COD removal rate. The value of COD effluent and its removal rate in optimum aeration time was used to determine the recommended of operation condition of pretreatment. Research result shows that chosen pH operation condition is pH 8. Prechorination can make effluent quality which meets standard quality and highest COD removal rate. The chosen Cl2 dosage is 6 mg/L.

Treatment of strong nitrogen swine wastewater in a full-scale sequencing batch reactor

2004 ◽  
Vol 49 (5-6) ◽  
pp. 315-323 ◽  
Author(s):  
K.M. Poo ◽  
B.H. Jun ◽  
S.H. Lee ◽  
J.H. Im ◽  
H.J. Woo ◽  
...  
Keyword(s):  
Batch Reactor ◽  
P Uptake ◽  
Full Scale ◽  
Swine Wastewater ◽  
High Concentration ◽  
Effluent Quality ◽  
Loading Rates ◽  
Maximum Loading ◽  
Swine Urine

Treatment of swine wastewater containing strong nitrogen was attempted in a full-scale SBR. The strongest swine wastewater was discharged from a slurry-type barn and called swine-slurry wastewater (SSW). Slightly weaker wastewater was produced from a scraper-type barn and called swine-urine wastewater (SUW). TCOD, NH4+-N and TSS in raw SSW were 23,000-72,000 mg/L, 3,500-6,000 mg/L and 17,000-50,000 mg/L, respectively. A whole cycle of SBR consists of 4 sub-cycles with anoxic period of 1 hr and aerobic period of 3 hr. The maximum loading rates of both digested-SSW and SUW were similar to 0.22 kg NH4+-N/m3/day whereas the maximum loading rates of raw SSW was up to 0.35 TN/m3/day on keeping the effluent quality of 60 TN mg/l. The VFAs portion of SCOD in raw SSW was about more than 60%. The VFAs in SUW and digested-SSW were about 22% and 15%, respectively. NH4+-N and PO43--P in SSW were removed efficiently compared to those in digested-SSW and DUW because SSW had high a C/N ratio and readily biodegradable organic. High concentration of organic was useful to enhance denitrification and P uptake. Also the amount of external carbon for denitrification was reduced to 5% and 10% of those for digested-SSW and SUW.

Feasibility study of sequencing batch reactor system for upgrading wastewater treatment in Malaysia

2004 ◽  
Vol 48 (11-12) ◽  
pp. 327-335 ◽  
Author(s):  
S. Al-Shididi ◽  
M. Henze ◽  
Z. Ujang
Keyword(s):  
Continuous Monitoring ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Cost Effective ◽  
Operating Conditions ◽  
Effluent Quality ◽  
Operational Cycle ◽  
Laboratory Investigations ◽  
Removal Efficiencies ◽  
Additional Carbon Source

The objective of this study was to assess the feasibility of the Sequencing Batch Reactor (SBR) system for implementation in Malaysia. Theoretical, field, laboratory investigations, and modelling simulations have been carried out. The results of the study indicated that the SBR system was robust, relatively cost-effective, and efficient under Malaysian conditions. However, the SBR system requires highly skilled operators and continuous monitoring. This paper also attempted to identify operating conditions for the SBR system, which optimise both the removal efficiencies and the removal rates. The removal efficiencies could reach 90–96% for COD, up to 92% for TN, and 95% for SS. An approach to estimate a full operational cycle time, to estimate the de-sludging rate, and to control the biomass in the sludge has also been developed. About 4 hours react time was obtained, as 2.25 hours of nitrification with aerated slow fill and 1.75 hour of denitrification with HAc addition as an additional carbon source. Inefficient settling was one of the problems that affect the SBR effluent quality. The settling time was one hour for achieving Standard B (effluent quality) and 2 hours for Standard A.

Improvement and prediction of OSA system performance in sludge reduction through integration with thermal and mechanical treatment

2016 ◽  
Vol 74 (9) ◽  
pp. 2087-2096 ◽  
Author(s):  
Sara Nazif ◽  
Naser Mehrdadi ◽  
Sajad Zare ◽  
Sarvenaz Mosavari
Keyword(s):  
Thermal Treatment ◽  
Mechanical Treatment ◽  
Removal Rate ◽  
Batch Reactor ◽  
Cod Removal ◽  
Aeration Tank ◽  
Sludge Reduction ◽  
Mechanical Mixing ◽  
Effluent Quality ◽  
Sludge Production

The oxic–settling–anoxic (OSA) process is one of the sludge production reduction methods in the activated sludge process. In this method, sludge is stored in an anaerobic tank within the sludge return line before entrance into an aeration tank. Due to this method's flexibility in application to operating treatment plants and not being energy-consuming, its application is developing. In this research, the improvement of the OSA process is investigated via thermal and mechanical treatment in a sequencing batch reactor (SBR). A pilot-scale reactor and domestic wastewater are used. Sludge was subjected to high temperature in an anaerobic tank using a heat transformer and it was subjected to mechanical shear through mechanical mixing in the anaerobic tank. Different temperatures and voltages were tested. The OSA process reduced sludge production by 24% while the chemical oxygen demand (COD) removal rate decreased from 90% to 86%. Thermal treatment combined with the OSA process caused a maximum of 46% sludge production reduction. However temperatures above 90 °C are not recommended due to a high level of decrease in COD removal. Mechanical mixing in combination with the OSA process led to 34% sludge production reduction. The effluent quality is not affected by the OSA process itself but is slightly reduced by thermal treatment and mechanical mixing. Therefore, for reaching the maximum sludge reduction in OSA plus thermal and mechanical treatment it would be necessary to evaluate the effect of different sets of parameters on effluent quality beside the sludge reduction. For this purpose multi-layer perceptron artificial neural network models are developed to predict the effluent total suspended solids and COD removal efficiency as well as sludge production rate. The models perform well and would be useful tools in determining the optimal set of system operation parameters.

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.

Full-Scale Test on Coupled Thermo-Hydro-Mechanical Processes in Engineered Barrier System

1994 ◽  
Vol 1 (1) ◽  
pp. 77-83
Author(s):  
Yoshiji Moro ◽  
Tomoo Fujita ◽  
Takeshi Kanno ◽  
Akira Kobayashi
Keyword(s):  
Full Scale ◽  
Full Scale Test ◽  
Scale Test ◽  
Engineered Barrier

The assessment of particulate matter (PM2.5) removal efficiency on air cleaner products through full scale test in Korea

2019 ◽  
Vol 18 (1) ◽  
pp. 76-80 ◽  
Author(s):  
Kichul Kim ◽  
Pil-Ju Park ◽  
Soomi Eo ◽  
Seungmi Kwon ◽  
Kwangrae Kim ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Removal Efficiency ◽  
Full Scale ◽  
Full Scale Test ◽  
Air Cleaner ◽  
Scale Test

A Critical Look into the Deviation of Full Scale Performance from Design Expectations

1989 ◽  
Vol 21 (10-11) ◽  
pp. 1389-1402 ◽  
Author(s):  
R. Zaloum
Keyword(s):  
Expert Systems ◽  
Waste Treatment ◽  
Full Scale ◽  
Operating Conditions ◽  
Organic Load ◽  
Computer Assisted ◽  
Uniform Load ◽  
Effluent Quality ◽  
Simulation Techniques ◽  
Steady Level

Deviations from design expectations appear to stem from views which assume that a unique response should result from a given set of operating conditions. The results of this study showed that two systems operating at equal organic loads or F/M ratios and at the same SRT do not necessarily give equal responses. This deviation was linked to the manner in which the HRT and influent COD are manipulated to obtain a constant or uniform load, and to subtle interactions between influent COD, HRT and SRT on the biomass and effluent responses. Increases of up to 200% in influent COD from one steady level to the next did not significantly influence the effluent VSS concentration while an effect on filtered COD was observed for increases as low as 20%. Effluent TKN and filtered COD correlated strongly with the operating MLVSS while phosphorus residual depended on the operating SRT and the organic load removed. These results point to the inadequacy of traditional models to predict effluent quality and point to the need to consider these effects when developing simulation techniques or computer assisted expert systems for the control of waste treatment plants.

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