Application of Data Driven techniques to Predict N2O Emission in Full-scale WWTPs

The emission of nitrous oxide (N2O) from full-scale anoxic/anaerobic/oxic (A2O) and sequencing batch reactor (SBR) processes was measured to evaluate N2O emission from urban wastewater treatment plants (WWTPs). The results showed that N2O flux in the A2O WWTP followed an order of A2O-oxic zone > aerated grit tank >> A2O-anaerobic zone > A2O-anoxic zone > final clarifier > primary clarifier, while in the SBR WWTP the order was SBR tank >> swirl grit tank > wastewater distribution tank and within the SBR tank in an order of SBR-feeding period > SBR-aeration period > SBR-settling period > SBR-decanting period. N2O emission from the A2O WWTP was approximately 486.61 kg d−1, 96.9% of which was from the A2O-oxic zone. In the SBR WWTP, the emission of N2O was 339.24 kg d−1 with 99.9% of the total emission coming from the periods of feeding and aeration. There was 6.52% of nitrogen-load in the influent being transformed to the emitted N2O in the SBR WWTP; the percentage was 3.35 times higher than that in the A2O WWTP.

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Effect of aeration regime on N2O emission from partial nitritation-anammox in a full-scale granular sludge reactor

Water Research ◽

10.1016/j.watres.2014.10.056 ◽

2015 ◽

Vol 68 ◽

pp. 793-803 ◽

Cited By ~ 73

Author(s):

C.M. Castro-Barros ◽

M.R.J. Daelman ◽

K.E. Mampaey ◽

M.C.M. van Loosdrecht ◽

E.I.P. Volcke

Keyword(s):

Granular Sludge ◽

N2o Emission ◽

Full Scale ◽

Partial Nitritation

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Fingerprinting the ship propulsion system: low hanging fruit or mission impossible?

10.24868/issn.2631-8741.2018.013 ◽

2018 ◽

Author(s):

A Vrijdag ◽

Y Sang

Keyword(s):

Transfer Functions ◽

Full Scale ◽

Propulsion System ◽

Data Driven ◽

Parameter Estimates ◽

System Parameters ◽

Ship Propulsion ◽

Wide Range ◽

System Input ◽

Ship Operation

In this paper the concept of ship propulsion system “fingerprinting” is explored as an alternative for data driven models that require extensive measured datasets collected over long periods of ship operation. As a first exploratory step a model of a ship in bollard pull conditions is linearised and its transfer functions are determined. Subsequently limited experimental data, involving sinusoidal excitation of the system input at a wide range of frequencies, is used to determine the system parameters. The resulting parameter estimates compare well against previously determined values. Although the developed ideas are far from ready to be used on full scale, the authors believe that the approach is promising enough to be developed further towards full scale application.

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A data-driven approach for simulation of full-scale downburst wind speeds

Journal of Wind Engineering and Industrial Aerodynamics ◽

10.1016/j.jweia.2013.08.010 ◽

2013 ◽

Vol 123 ◽

pp. 171-190 ◽

Cited By ~ 35

Author(s):

Lijuan Wang ◽

Megan McCullough ◽

Ahsan Kareem

Keyword(s):

Full Scale ◽

Data Driven ◽

Wind Speeds ◽

Data Driven Approach

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Assessment of Full-Scale N2O Emission Characteristics and Testing of Control Concepts in an Activated Sludge Wastewater Treatment Plant with Alternating Aerobic and Anoxic Phases

Environmental Science & Technology ◽

10.1021/acs.est.9b04889 ◽

2019 ◽

Vol 53 (21) ◽

pp. 12485-12494 ◽

Cited By ~ 5

Author(s):

Xueming Chen ◽

Artur Tomasz Mielczarek ◽

Kirsten Habicht ◽

Mikkel Holmen Andersen ◽

Dines Thornberg ◽

...

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

N2o Emission ◽

Full Scale ◽

Emission Characteristics

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Interneuronal mechanisms of hippocampal theta oscillations in a full-scale model of the rodent CA1 circuit

eLife ◽

10.7554/elife.18566 ◽

2016 ◽

Vol 5 ◽

Cited By ~ 67

Author(s):

Marianne J Bezaire ◽

Ivan Raikov ◽

Kelly Burk ◽

Dhrumil Vyas ◽

Ivan Soltesz

Keyword(s):

Information Processing ◽

Theta Rhythm ◽

Gamma Oscillations ◽

Full Scale ◽

Theta Oscillations ◽

Data Driven ◽

Scale Model ◽

Hippocampal Theta Rhythm ◽

Ca1 Area ◽

Hippocampal Theta

The hippocampal theta rhythm plays important roles in information processing; however, the mechanisms of its generation are not well understood. We developed a data-driven, supercomputer-based, full-scale (1:1) model of the rodent CA1 area and studied its interneurons during theta oscillations. Theta rhythm with phase-locked gamma oscillations and phase-preferential discharges of distinct interneuronal types spontaneously emerged from the isolated CA1 circuit without rhythmic inputs. Perturbation experiments identified parvalbumin-expressing interneurons and neurogliaform cells, as well as interneuronal diversity itself, as important factors in theta generation. These simulations reveal new insights into the spatiotemporal organization of the CA1 circuit during theta oscillations.

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