Study the effect of recycled pressurized air on oxygen transfer design parameters in sequencing batch reactor technology

2016 ◽  
Vol 31 (1) ◽  
pp. 90-96 ◽  
Author(s):  
Hesham M. Elkaramany ◽  
Amro A. Elbaz ◽  
Amal N. Mohamed ◽  
Alhassan H. Sakr
Keyword(s):  
Oxygen Transfer ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Design Parameters ◽  
Reactor Technology

scholarly journals Laboratory-scale anaerobic sequencing batch reactor for treatment of stillage from fruit distillation

2013 ◽  
Vol 67 (5) ◽  
pp. 1068-1074 ◽  
Author(s):  
Elena Cristina Rada ◽  
Marco Ragazzi ◽  
Vincenzo Torretta
Keyword(s):  
Anaerobic Digestion ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Gas Production ◽  
Design Parameters ◽  
Anaerobic Sequencing Batch Reactor ◽  
Reactor Technology ◽  
Volatile Solids ◽  
Experimental Apparatus

This work describes batch anaerobic digestion tests carried out on stillages, the residue of the distillation process on fruit, in order to contribute to the setting of design parameters for a planned plant. The experimental apparatus was characterized by three reactors, each with a useful volume of 5 L. The different phases of the work carried out were: determining the basic components of the chemical oxygen demand (COD) of the stillages; determining the specific production of biogas; and estimating the rapidly biodegradable COD contained in the stillages. In particular, the main goal of the anaerobic digestion tests on stillages was to measure the parameters of specific gas production (SGP) and gas production rate (GPR) in reactors in which stillages were being digested using ASBR (anaerobic sequencing batch reactor) technology. Runs were developed with increasing concentrations of the feed. The optimal loads for obtaining the maximum SGP and GPR values were 8–9 gCOD L−1 and 0.9 gCOD g−1 volatile solids.

Estimation of oxygen transfer rate in sequencing batch reactor

1996 ◽  
Vol 34 (3-4) ◽  
pp. 413-420
Author(s):  
Y. C. Liao ◽  
D. J. Lee
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Transfer ◽  
Transfer Rate ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Transfer Rate ◽  
Intermittent Aeration ◽  
Transient Effects ◽  
Operational Parameters ◽  
Transient Model

Transient model of oxygen transfer rate in a sequencing batch reactor is derived and solved numerically. The dissolved oxygen response under several conditions is analyzed. Effects of operational parameters and liquid bath height are studied. When with short, intermittent aeration periods, the transient effects on oxygen transfer rate may be substantial and should be taken into considerations. An example considering bioreaction is also given.

Sequencing Batch Reactor Technology

2010 ◽  
pp. 721-747 ◽  
Author(s):  
Lawrence K. Wang ◽  
Nazih K. Shammas
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Reactor Technology

Biological treatment of greywater using sequencing batch reactor technology

2008 ◽  
Vol 65 (1) ◽  
pp. 71-85 ◽  
Author(s):  
A. Jamrah ◽  
A. Al‐Futaisi ◽  
M. Ahmed ◽  
S. Prathapar ◽  
A. Al‐Harrasi ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Reactor Technology

scholarly journals Design of Sequencing Batch Reactor (SBR) Treatment Plant for Abattoir Wastewater (A Case of Apa Mmini Stream)

2020 ◽  
pp. 15-21
Author(s):  
Ogbebor Daniel ◽  
Ndekwu, Benneth Onyedikachukwu
Keyword(s):  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Settling Velocity ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Design Parameters ◽  
Sequence Batch Reactor ◽  
The Impact

Aim: The study aimed at designing a wastewater treatment method for removal of (Biological Oxygen Demand) BOD5 using Sequencing batch reactor (SBR). Study Design: SBR functions as a fill-and-draw type of activated sludge system involving a single complete-mix reactor where all steps of an activated sludge process take place. Methodology: The intermittent nature of slaughterhouse wastewaters favours batch treatment methods like sequence batch reactor (SBR). Attempts to remediate the impact of this BOD5 on the stream, led to the design of a sequence batch reactor which was designed to treat slaughterhouse effluent of 1000 L. Results: The oxygen requirement for effective removal of BOD5 to 95% was determined to be 21.10513 kgO2/d, while L:B  of 3:1 was considered for the reactor. Also, air mixing pressure for the design was 0.16835 bar, while settling velocity was . Conclusion: To ensure proper treatment of BOD5 load of the slaughterhouse, a sequencing Batch reactor of 1000 litre carrying capacity was designed. For effective operation of this design, the pressure exerted by the mixing air was 0.16835 bar which was far greater than the pressure exerted by the reactor content and the nozzle. Settling velocity of 0.0003445 m/s for 0.887 hrs was required for the reactor to be stable and a theoretical air requirement of 1.6884 m³/d was calculated. Hence the power dissipated by the rising air bubbles to ensure efficient mixing of oxygen in the reactor was calculated as 26530003.91 Kilowatts. With these design parameters, the high BOD5 load downstream of the river can be treated to fall below the FMEnv recommended limit of 50 mg/l.

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