Quantification method of N2O emission from full-scale biological nutrient removal wastewater treatment plant by laboratory batch reactor analysis

2014 ◽  
Vol 165 ◽  
pp. 111-115 ◽  
Author(s):  
Yesul Lim ◽  
Dong-Jin Kim
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plant ◽  
Batch Reactor ◽  
Treatment Plant ◽  
N2o Emission ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Quantification Method

A logistic model for the remediation of filamentous bulking in a biological nutrient removal wastewater treatment plant

2015 ◽  
Vol 72 (3) ◽  
pp. 391-405 ◽  
Author(s):  
Nashia Deepnarain ◽  
Sheena Kumari ◽  
Jordache Ramjith ◽  
Feroz Mahomed Swalaha ◽  
Valter Tandoi ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plant ◽  
In Situ Hybridisation ◽  
Treatment Plant ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Filamentous Bacteria ◽  
Operational Parameters ◽  
Filamentous Bulking

Biological nutrient removal (BNR) systems across the globe frequently experience bulking and foaming episodes, which present operational challenges such as poor sludge settling due to excessive filamentous bacteria. A full-scale BNR plant treating primarily domestic wastewater was monitored over a period of 1 year to investigate filamentous bacterial growth response under various plant operating parameters. Identification of filamentous bacteria by conventional microscopy and fluorescent in situ hybridisation indicated the dominance of Eikelboom Type021N, Thiothrix spp., Eikelboom Type 1851 and Eikelboom Type 0092. A cumulative logit model (CLM) was applied to elucidate significant relationships between the filamentous bacteria and plant operational parameters. The model could predict the potential abundance of dominant filamentous bacteria in relation to wastewater treatment plant operational parameters. Data obtained from the model corroborated with previous findings on the dominance of most filaments identified, except for Type 0092, which exhibited some unique traits. With further validation, the model could be successfully applied for identifying specific parameters which could contribute towards filamentous bulking, thus, providing a useful tool for regulating specific filamentous growth in full-scale wastewater treatment plants.

Alternatives for upgrading the Wilderness Wastewater Treatment Plant for biological nutrient removal

2004 ◽  
Vol 48 (11-12) ◽  
pp. 453-462
Author(s):  
E.U. Cokgor ◽  
C.W. Randall
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Biological Nutrient Removal ◽  
Oxidation Ditch ◽  
Concentric Ring ◽  
Annual Average ◽  
Flow Capacity ◽  
Ring Oxidation

The Wilderness Wastewater Treatment Plant (WWTP) located in Orange County, Virginia is a four concentric ring oxidation ditch activated sludge system with a rated capacity of 1,935 m3/day. The three outer rings are used for wastewater treatment and the inner ring is used as an aerobic digester. The flow capacity has been increased from 1,935 to 3,760 m3/d, however, the desired design capacity has since been increased to 3,870 m3/d, and there are plans to eventually expand to approximately 4,840 m3/d with improved nitrogen removal. The design goal for the planned upgrade is to discharge an effluent that contains less than 10 mg/l total nitrogen (TN) at all times, with an annual average of 8 mg/l or less. In this study, the pre-upgrade performance of the Wilderness Wastewater Treatment Plant was evaluated and several modifications were recommended for the incorporation of biological nutrient removal (BNR).

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