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Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment plants

Ma, Shuai; Zeng, Siyu; Dong, Xin; Chen, Jining and Olsson, Gustaf LU (2014) In Frontiers of Environmental Science and Engineering in China 8(1). p.128-136
Abstract
The prediction of the influent load is of great importance for the improvement of the control system to a large wastewater treatment plant. A systematic data analysis method is presented in this paper in order to estimate and predict the periodicity of the influent flow rate and ammonia (NH3) concentrations: 1) data filtering using wavelet decomposition and reconstruction; 2) typical cycle identification using power spectrum density analysis; 3) fitting and prediction model establishment based on an autoregressive model. To give meaningful information for feedforward control systems, predictions in different time scales are tested to compare the corresponding predicting accuracy. Considering the influence of the rainfalls, a linear fitting... (More)
The prediction of the influent load is of great importance for the improvement of the control system to a large wastewater treatment plant. A systematic data analysis method is presented in this paper in order to estimate and predict the periodicity of the influent flow rate and ammonia (NH3) concentrations: 1) data filtering using wavelet decomposition and reconstruction; 2) typical cycle identification using power spectrum density analysis; 3) fitting and prediction model establishment based on an autoregressive model. To give meaningful information for feedforward control systems, predictions in different time scales are tested to compare the corresponding predicting accuracy. Considering the influence of the rainfalls, a linear fitting model is derived to estimate the relationship between flow rate trend and rain events. Measurements used to support coefficient fitting and model testing are acquired from two municipal wastewater treatment plants in China. The results show that 1) for both of the two plants, the periodicity affects the flow rate and NH3 concentrations in different cycles (especially cycles longer than 1 day); 2) when the flow rate and NH3 concentrations present an obvious periodicity, the decreasing of prediction accuracy is not distinct with increasing of the prediction time scales; 3) the periodicity influence is larger than rainfalls; 4) the rainfalls will make the periodicity of flow rate less obvious in intensive rainy periods. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
influent load prediction, wavelet de-noising, power spectrum density, autoregressive model, time-frequency analysis, wastewater treatment
in
Frontiers of Environmental Science and Engineering in China
volume
8
issue
1
pages
128 - 136
publisher
Higher Education Press
external identifiers
  • wos:000330209000013
  • scopus:84888088452
ISSN
2095-2201
DOI
10.1007/s11783-013-0598-9
language
English
LU publication?
yes
id
9e6d0ce2-2301-4d43-8607-e35a2fa1307c (old id 4318538)
date added to LUP
2014-02-25 10:42:09
date last changed
2017-01-01 03:46:53
@article{9e6d0ce2-2301-4d43-8607-e35a2fa1307c,
  abstract     = {The prediction of the influent load is of great importance for the improvement of the control system to a large wastewater treatment plant. A systematic data analysis method is presented in this paper in order to estimate and predict the periodicity of the influent flow rate and ammonia (NH3) concentrations: 1) data filtering using wavelet decomposition and reconstruction; 2) typical cycle identification using power spectrum density analysis; 3) fitting and prediction model establishment based on an autoregressive model. To give meaningful information for feedforward control systems, predictions in different time scales are tested to compare the corresponding predicting accuracy. Considering the influence of the rainfalls, a linear fitting model is derived to estimate the relationship between flow rate trend and rain events. Measurements used to support coefficient fitting and model testing are acquired from two municipal wastewater treatment plants in China. The results show that 1) for both of the two plants, the periodicity affects the flow rate and NH3 concentrations in different cycles (especially cycles longer than 1 day); 2) when the flow rate and NH3 concentrations present an obvious periodicity, the decreasing of prediction accuracy is not distinct with increasing of the prediction time scales; 3) the periodicity influence is larger than rainfalls; 4) the rainfalls will make the periodicity of flow rate less obvious in intensive rainy periods.},
  author       = {Ma, Shuai and Zeng, Siyu and Dong, Xin and Chen, Jining and Olsson, Gustaf},
  issn         = {2095-2201},
  keyword      = {influent load prediction,wavelet de-noising,power spectrum density,autoregressive model,time-frequency analysis,wastewater treatment},
  language     = {eng},
  number       = {1},
  pages        = {128--136},
  publisher    = {Higher Education Press},
  series       = {Frontiers of Environmental Science and Engineering in China},
  title        = {Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment plants},
  url          = {http://dx.doi.org/10.1007/s11783-013-0598-9},
  volume       = {8},
  year         = {2014},
}