Nitrification/Denitrification in Intermittent Aeration Process for Swine Wastewater Treatment

2001 ◽  
Vol 127 (8) ◽  
pp. 705-711 ◽  
Author(s):  
Jiayang Cheng ◽  
Bin Liu
Keyword(s):  
Wastewater Treatment ◽  
Swine Wastewater ◽  
Intermittent Aeration ◽  
Aeration Process

Activated Sludge Model No. 1 calibration for piggery wastewater treatment using respirometry

2004 ◽  
Vol 49 (5-6) ◽  
pp. 389-396 ◽  
Author(s):  
H. Boursier ◽  
F. Beline ◽  
E. Paul
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Intermittent Aeration ◽  
Hydrolysis Constant ◽  
Piggery Wastewater ◽  
Activated Sludge Model ◽  
A Value ◽  
Organic Fractions ◽  
Aeration Process ◽  
Kinetics Of

To optimise the intermittent aeration process for piggery wastewater, the Activated Sludge Model No. 1 needs to be calibrated and adapted to this specific effluent. By combining aerobic and anoxic respirometric tests, biodegradation kinetics of organic fractions in piggery wastewater could be studied. Modeling of the respirometric curves proved that the simplified hydrolysis model was sufficient for piggery wastewater treatment simulation. The hydrolysis constant (KH) and heterotrophic sludge yield (YH) were determined at temperature and pH in the ranges 10-40°C and 7-9, respectively. The constants were slightly influenced by the temperature but not significantly affected by the pH, with average values of 3 d-1 for KH, and 0.60 for YH. The anoxic respirometric tests revealed that the experimental ASM1 anoxic correction factor (ηg) was higher than one. This could be explained by the fact that the anoxic and the aerobic heterotrophic sludge yields were probably different. By fixing a value of 0.8 for ηg, the anoxic sludge yield (YHD) could be calculated at 0.53. A modified version of ASM1 for substrate biodegradation in piggery wastewater intermittent aeration process was proposed, including the separation between the anoxic and the aerobic sludge yields and a simplified hydrolysis kinetic.

Innovative technologies for wastewater treatment in coastal tourist areas

2002 ◽  
Vol 46 (8) ◽  
pp. 67-74 ◽  
Author(s):  
D. Orhon ◽  
I. Sekoulov ◽  
H. Dulkadiroglu
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Intermittent Aeration ◽  
Flow Process ◽  
Innovative Technologies ◽  
Treatment Technologies ◽  
Continuous Flow Process ◽  
Aeration Process ◽  
Selection Of

The selection of appropriate wastewater treatment technologies for coastal tourist areas is important in the sense that they have to meet stringent effluent limits in a simple and easy to operate flow scheme. This paper outlines different effluent standards implemented in sensitive coastal areas and briefly discusses the merit of a number of innovative technologies, namely the sequencing batch reactor, the intermittent aeration process, the moving bed reactor and the biofim-filter-sequencing batch reactor system, either as a batch or continuous flow process applicable in these areas.

Nitrogen Removal from Anaerobically Pretreated Swine Wastewater in an Intermittent Aeration Process

2005 ◽  
Author(s):  
Melanie A. Head ◽  
Cesar R. Mota ◽  
Jennifer A. Ridenoure ◽  
Francis L. de los Reyes III ◽  
and Jay J. Cheng
Keyword(s):  
Nitrogen Removal ◽  
Swine Wastewater ◽  
Intermittent Aeration ◽  
Aeration Process

scholarly journals Minimization of N2O Emission through Intermittent Aeration in a Sequencing Batch Reactor (SBR): Main Behavior and Mechanism

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 210
Author(s):  
Tang Liu ◽  
Shufeng Liu ◽  
Shishi He ◽  
Zhichao Tian ◽  
Maosheng Zheng
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Quantitative Polymerase Chain Reaction ◽  
N2o Emission ◽  
Ammonia Oxidizer ◽  
Batch Reactors ◽  
Intermittent Aeration ◽  
Major Pathway ◽  
Nitrifier Denitrification

To explore the main behavior and mechanism of minimizing nitrous oxide (N2O) emission through intermittent aeration during wastewater treatment, two lab-scale sequencing batch reactors operated at intermittently aerated mode (SBR1), and continuously aerated mode (SBR2) were established. Compared with SBR2, the intermittently aerated SBR1 reached not only a higher total nitrogen removal efficiency (averaged 93.5%) but also a lower N2O-emission factor (0.01–0.53% of influent ammonia), in which short-cut nitrification and denitrification were promoted. Moreover, less accumulation and consumption of polyhydroxyalkanoates, a potential endogenous carbon source promoting N2O emission, were observed in SBR1. Batch experiments revealed that nitrifier denitrification was the major pathway generating N2O while heterotrophic denitrification played as a sink of N2O, and SBR1 embraced a larger N2O-mitigating capability. Finally, quantitative polymerase chain reaction results suggested that the abundant complete ammonia oxidizer (comammox) elevated in the intermittently aerated environment played a potential role in avoiding N2O generation during wastewater treatment. This work provides an in-depth insight into the utilization of proper management of intermittent aeration to control N2O emission from wastewater treatment plants.

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