A thermodynamic analysis of the activated sludge process: Application to soybean wastewater treatment in a sequencing batch reactor

AIChE Journal ◽  
2009 ◽  
Vol 55 (10) ◽  
pp. 2737-2745 ◽  
Author(s):  
Bing-jie Ni ◽  
Han-qing Yu
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Thermodynamic Analysis ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Activated Sludge Process

Advanced Treatment of Domestic Wastewater Using Sequencing Batch Reactor Activated Sludge Process

1993 ◽  
Vol 28 (10) ◽  
pp. 267-274 ◽  
Author(s):  
M. Imura ◽  
E. Suzuki ◽  
T. Kitao ◽  
S. Iwai
Keyword(s):  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Domestic Wastewater ◽  
Experimental Period ◽  
Small Scale ◽  
Experimental Plant ◽  
Activated Sludge Process ◽  
Nitrogen And Phosphorus ◽  
Experimental Apparatus

In order to apply a sequencing batch reactor activated sludge process to small scale treatment facilities, various experiments were conducted by manufacturing an experimental apparatus made of a factory-produced FRP cylinder transverse tank (Ø 2,500mm). Results of the verification test conducted for one year by leading the wastewater discharged from apartment houses into the experimental apparatus were as follows. Excellent performance was achieved without any addition of carbon source, irrespective of the organic compound concentration and the temperature of raw wastewater. Organic substances, nitrogen and phosphorus were removed simultaneously. Due to the automated operation format, stable performance was obtained with only periodic maintenance. Though water depth of the experimental plant was shallow, effective sedimentation of activated sludge was continued during the experimental period. Regarding the aerobic and anaerobic process, nitrification and denitrification occurred smoothly.

The impact of powdered keramsite on activated sludge and wastewater treatment in a sequencing batch reactor

2019 ◽  
Vol 237 ◽  
pp. 305-312 ◽  
Author(s):  
Adam Masłoń ◽  
Janusz A. Tomaszek ◽  
Justyna Zamorska ◽  
Monika Zdeb ◽  
Adam Piech ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
The Impact

scholarly journals Simulation for the Performance and Economic Evaluation of Conventional Activated Sludge Process Replacing by Sequencing Batch Reactor Technology in a Petroleum Refinery Wastewater Treatment Plant

2019 ◽  
Vol 3 (2) ◽  
pp. 45 ◽  
Author(s):  
Shahryar Jafarinejad
Keyword(s):  
Computer Simulation ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Petroleum Refinery ◽  
Batch Reactor ◽  
Refinery Wastewater ◽  
Conventional Activated Sludge ◽  
Petroleum Refinery Wastewater ◽  
Project Construction

Treatment of the petroleum refinery wastewater containing complex chemicals using biological processes is usually challenging because of the inhibition and/or toxicity of these matters when they serve as microbial substrates. In addition, performance modeling and cost evaluation of processes are essential for designing, construction, and forecasting future economic requirements of the petroleum refinery wastewater treatment plants (PRWWTPs). In this study, the performance and economics of conventional activated sludge (CAS) process replacing by sequencing batch reactor (SBR) technology in a two train PRWWTP were evaluated using simulation. The final treated effluent characteristics for the PRWWTPs containing CAS + CAS and SBR + CAS processes under steady state conditions were studied and evolution of the main parameters of the final effluent during the 30 days of simulation for these plants were investigated. Finally, the total project construction, operation labor, maintenance, material, chemical, energy, and amortization costs of these plants were estimated and compared. Results demonstrated that the project construction cost of PRWWTP containing CAS + CAS processes was lower than that of PRWWTP containing SBR + CAS processes and the energy and amortization costs for both plants were higher in comparison with the operation, maintenance, material, and chemical costs. Note that this study is a computer simulation and drawing general conclusions only on the basis of computer simulation may be insufficient.

pH: Keyfactor in the Biological Phosphorus Removal Process

1994 ◽  
Vol 29 (7) ◽  
pp. 71-74 ◽  
Author(s):  
G. J. F. Smolders ◽  
M. C. M. van Loosdrecht ◽  
J. J. Heijnen
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Glycogen Metabolism ◽  
Activated Sludge Process ◽  
Biological Phosphorus Removal ◽  
Anaerobic Conditions ◽  
Biochemical Mechanisms ◽  
Biological Phosphorus

Experiments have been performed, using a sequencing batch reactor, to examine the effect of pH on biological phosphorus removal in the activated sludge process. The results, which indicate that glycogen metabolism occurs during anaerobic conditions, are useful in elucidating the biochemical mechanisms involved in phosphorus-removal, and have potential implications for systems such as Phostrip.

Removal of Nutrients and BOD from Soybean Fermentation Wastewater in a Ten-Year-Old Sequencing Batch Reactor Activated Sludge Process

1990 ◽  
Vol 22 (9) ◽  
pp. 85-92 ◽  
Author(s):  
M. Okada ◽  
K. Terazono ◽  
R. Sudo
Keyword(s):  
Activated Sludge ◽  
High Performance ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Diurnal Fluctuation ◽  
Activated Sludge Process ◽  
Subsequent Increase ◽  
Fermentation Products ◽  
Soybean Fermentation ◽  
Bod Removal

Surveys on the performance of nitrogen, phosphorus and BOD removal were carried out in a full-scale conventional, i.e. continuously aerated, sequencing batch reactor (SBR) activated sludge process which was constructed ten years ago, treating wastewater from a small factory producing soybean fermentation products. The old SBR plant, originally designed only for BOD removal, is operated with one cycle per day and aerated continuously for 19 hours per day from the start of working and wastewater inflow followed by sedimentation and decanting the next morning before work. In spite of continuous and a constant rate of aeration, DO increased rapidly immediately after the beginning of aeration, whereas it decreased down to less than 0.5 mg l−1 with the inflow of wastewater. DO increased again after work with little inflow of wastewater. The diurnal fluctuation of DO enhanced both nitrification and denitrification simultaneously in a single tank reactor with continuous aeration and resulted in high performance of nitrogen removal beyond expectation as well as BOD. The anaerobic condition and subsequent increase in DO also enhanced release and luxury uptake of phosphorus, i.e. biological removal of phosphorus. Increase in the strength of wastewater enhanced denitrification without deterioration of BOD removal. Phosphorus removal, however, was deteriorated by insufficient sludge production.

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