scholarly journals Unravelling the spatial variation of nitrous oxide emissions from a step-feed plug-flow full scale wastewater treatment plant

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Yuting Pan ◽  
Ben van den Akker ◽  
Liu Ye ◽  
Bing-Jie Ni ◽  
Shane Watts ◽  
...  
2020 ◽  
Vol 185 ◽  
pp. 116196 ◽  
Author(s):  
Haoran Duan ◽  
Ben van den Akker ◽  
Benjamin J. Thwaites ◽  
Lai Peng ◽  
Caroline Herman ◽  
...  

2018 ◽  
Vol 52 (10) ◽  
pp. 5803-5811 ◽  
Author(s):  
Kati Blomberg ◽  
Pascal Kosse ◽  
Anna Mikola ◽  
Anna Kuokkanen ◽  
Tommi Fred ◽  
...  

Química Nova ◽  
2013 ◽  
Vol 36 (1) ◽  
pp. 16-20 ◽  
Author(s):  
William Z. de Mello ◽  
Renato P. Ribeiro ◽  
Ariane C. Brotto ◽  
Débora C. Kligerman ◽  
Andrezza de S. Piccoli ◽  
...  

2009 ◽  
Vol 2009 (10) ◽  
pp. 5347-5361 ◽  
Author(s):  
Joseph A. Kozak ◽  
Catherine O'Connor ◽  
Thomas Granato ◽  
Louis Kollias ◽  
Francesco Belluci ◽  
...  

Engevista ◽  
2015 ◽  
Vol 17 (3) ◽  
pp. 375 ◽  
Author(s):  
Renato Pereira Ribeiro ◽  
Jaime Lopes da Mota Oliveira ◽  
Débora Cynamon Kligerman ◽  
Renata Barbosa Alvim ◽  
Samara Almeida Andrade ◽  
...  

Nitrous oxide emissions were determined in three campaigns in the aeration tank of a full scale conventional activated sludge wastewater treatment plant. During these experiments, the carbonaceous organic matter (BOD and COD) removal was high and rather constant (97-98% and 93-96%). The results indicate that the concentration of total nitrogen in the influent wastewater, especially NH4+, and the aeration flow rate are key controlling factor of N2O emissions from the aeration tank. Nitrification was the major source of N2O, suggested by the behavior of DO concentrations, NO3-/NH4+ ratio and pH values along the six interlinked zones of the aeration tank. Excessive air flow intensified N2O transfer from the liquor to the atmosphere by air stripping.


2012 ◽  
Vol 7 (1) ◽  
Author(s):  
S. S. Fatima ◽  
S. Jamal Khan

In this study, the performance of wastewater treatment plant located at sector I-9 Islamabad, Pakistan, was evaluated. This full scale domestic wastewater treatment plant is based on conventional activated sludge process. The parameters which were monitored regularly included total suspended solids (TSS), mixed liquor suspended solids (MLSS), mixed liquor volatile suspended solids (MLVSS), biological oxygen demand (BOD), and chemical oxygen demand (COD). It was found that the biological degradation efficiency of the plant was below the desired levels in terms of COD and BOD. Also the plant operators were not maintaining consistent sludge retention time (SRT). Abrupt discharge of MLSS through the Surplus Activated sludge (SAS) pump was the main reason for the low MLSS in the aeration tank and consequently low treatment performance. In this study the SRT was optimized based on desired MLSS concentration between 3,000–3,500 mg/L and required performance in terms of BOD, COD and TSS. This study revealed that SRT is a very important operational parameter and its knowledge and correct implementation by the plant operators should be mandatory.


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