Quality evaluation methods for wastewater treatment plant data
Loading...
Authors
Author (Corporation)
Publication date
2008
Typ of student thesis
Course of study
Collections
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Water Science and Technology
Special issue
DOI of the original publication
Link
Series
Series number
Volume
57
Issue / Number
10
Pages / Duration
1601-1609
Patent number
Publisher / Publishing institution
IWA Publishing
Place of publication / Event location
Edition
Version
Programming language
Assignee
Practice partner / Client
Abstract
Non identified systematic errors in data sets can cause severe problems inducing wrong decisions in function control, process modelling or planning of new treatment infrastructure. In this paper statistical methods are shown to identify systematic errors in full-scale WWTP data sets. With a redundant mass balance approach analyzing five different mass balances, systematic errors of about 10%–20% compared to the input fluxes can be identified at a 5%-significance level. A Shewhart control-chart approach to survey the data quality of on-line-sensors allows a statistical as well as a fast graphical analysis of the measurement process. A 19 month data set indicates that NO3−, PO4− and NH4− on-line analyzers in the filter effluent and MLSS sensors in the aeration tanks were not disturbed by any systematic error for 85–95% of the measuring time. The in-control-interval (±3·standard deviation) has a width of ±12–17% (NO3-N), ±35–40% (PO4-P), ±83% (NH4-N) and ±12–15% (TS) of the measured reference value.
Keywords
Control charts, Error propagation, Sensors, Statistical methods, Uncertainty, Wastewater treatment
Subject (DDC)
Event
Exhibition start date
Exhibition end date
Conference start date
Conference end date
Date of the last check
ISBN
ISSN
0273-1223
1474-3876
1474-3876
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Closed
License
Citation
Thomann, M. (2008). Quality evaluation methods for wastewater treatment plant data. Water Science and Technology, 57(10), 1601–1609. https://doi.org/10.2166/wst.2008.151