If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Use of Spectra in the Visible and Near-Mid-Ultraviolet Range with Principal Component Analysis and Partial Least Squares Processing for Monitoring of Suspended Solids in Municipal Wastewater Treatment Plants

$29.00 plus tax (Refund Policy)

Buy Article:

Abstract:

The present work assesses the possibility of using spectrophotometry in the near-mid-ultraviolet and visible wavelength ranges (282–790 nm) for the direct monitoring of treatment performance in municipal wastewater treatment plants (WWTPs). Principal component analysis (PCA) was used to analyze spectral data from samples collected along three WWTP process lines with different primary and secondary treatment units. The clustering observed in PCA score plots was mainly attributed to the suspended solids fraction present in the wastewater and highlighted differences in solids quality between plants and along the treatment lines. Thus, satisfactory partial least squares (PLS) calibration models to estimate total suspended solids (TSS) values from the acquired spectra could only be established per plant. The PLS models were established using 1–2 factors, with root mean error of cross-validation and coefficient of determination values in the 50–86 mg TSS L–1 and 82–95% ranges, respectively.

Keywords: PARTIAL LEAST SQUARES; PCA; PLS; PRINCIPAL COMPONENT ANALYSIS; SUSPENDED SOLIDS; ULTRAVIOLET–VISIBLE SPECTROSCOPY; WASTEWATER QUALITY MONITORING

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370210792434332

Affiliations: 1: IBB—Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisbon, Portugal. nidia.lourenco@ist.utl.pt 2: IBB—Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisbon, Portugal 3: SMAS de Almada, Praceta Ricardo Jorge, 2-2A Pragal, 2800-585 Almada, Portugal

Publication date: September 1, 2010

More about this publication?
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more