scholarly journals The Effects of Different External Carbon Sources on Nitrous Oxide Emissions during Denitrification in Biological Nutrient Removal Processes

2018 ◽  
Vol 301 ◽  
pp. 012111
Author(s):  
Xiang Hu ◽  
Jing Zhang ◽  
Hongxun Hou
Keyword(s):  
Nitrous Oxide ◽  
Nutrient Removal ◽  
Carbon Sources ◽  
Biological Nutrient Removal ◽  
Nitrous Oxide Emissions ◽  
Removal Processes

Assessment of the denitrification potential for biological nutrient removal processes using OUR/NUR measurements

2002 ◽  
Vol 46 (9) ◽  
pp. 237-246 ◽  
Author(s):  
S. Sözen ◽  
N. Artan ◽  
D. Orhon ◽  
E. Avcioglu
Keyword(s):  
Mass Balance ◽  
Nutrient Removal ◽  
Carbon Sources ◽  
Biological Nutrient Removal ◽  
Meat Processing ◽  
Denitrification Potential ◽  
Removal Processes ◽  
University Of Cape Town ◽  
Activated Sludge Systems ◽  
Key Parameter

The denitrification potential, a key parameter in nutrient removal activated sludge systems, is mathematically described in terms of mass balance expressions for different carbon sources, namely, easily biodegradable substrate, slowly biodegradable substrate and biomass. Mass balance was derived both for single-anoxic (pre-denitrification) and dual anoxic (Bardenpho) systems. Correction factors for anoxic growth were experimentally determined using respirometry for domestic sewage and meat processing wastewater. The denitrification potential expressions were evaluated for different process configurations such as pre-denitrification, Bardenpho process and University of Cape Town (UCT) process.

scholarly journals Modelization of Nutrient Removal Processes at a Large WWTP Using a Modified ASM2d Model

2018 ◽  
Vol 15 (12) ◽  
pp. 2817 ◽  
Author(s):  
Jakub Drewnowski ◽  
Jacek Makinia ◽  
Lukasz Kopec ◽  
Francisco-Jesus Fernandez-Morales
Keyword(s):  
Nutrient Removal ◽  
Carbon Sources ◽  
Oxygen Demand ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Organic Substrates ◽  
Modified Model ◽  
Rate Limiting Step ◽  
Uptake Rates ◽  
Rate Limiting

The biodegradation of particulate substrates starts by a hydrolytic stage. Hydrolysis is a slow reaction and usually becomes the rate limiting step of the organic substrates biodegradation. The objective of this work was to evaluate a novel hydrolysis concept based on a modification of the activated sludge model (ASM2d) and to compare it with the original ASM2d model. The hydrolysis concept was developed in order to accurately predict the use of internal carbon sources in enhanced biological nutrient removal (BNR) processes at a full scale facility located in northern Poland. Both hydrolysis concepts were compared based on the accuracy of their predictions for the main processes taking place at a full-scale facility. From the comparison, it was observed that the modified ASM2d model presented similar predictions to those of the original ASM2d model on the behavior of chemical oxygen demand (COD), NH4-N, NO3-N, and PO4-P. However, the modified model proposed in this work yield better predictions of the oxygen uptake rate (OUR) (up to 5.6 and 5.7%) as well as in the phosphate release and uptake rates.

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