Journal
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
Volume 137, Issue 7, Pages 596-601Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)EE.1943-7870.0000371
Keywords
Water quality; Fluorescence; Organic carbon; Coagulation; Water sampling
Funding
- Severn Trent Water Ltd.
- University of Birmingham
- Natural Environment Research Council [ceh010010] Funding Source: researchfish
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Optimization of organic matter (OM) removal is of key importance for effective water treatment, as its presence affects treatment processes. In particular, OM increases the operational cost of treatment caused by increased coagulant and disinfectant demands. In the work reported here, fluorescence spectroscopy is used to assess the effect of changing coagulation pH on OM removal, character, and composition. The results of a 3-month trial of low pH coagulation operation at a major surface water treatment works in the Midlands region of the UK are discussed, together with the effect upon total organic carbon (TOC) removal. OM removal was assessed on the basis of both measured removal and fluorescence-inferred removal (through intensity-reduction measurements). Fluorescence spectroscopy demonstrated that optimized coagulation affects the quantitative and qualitative OM properties. Fluorescence analyses were shown to complement other OM measurements, with reductions of peak intensities correlating well with removal of TOC in a range of different treatment conditions. DOI: 10.1061/(ASCE)EE.1943-7870.0000371. (C) 2011 American Society of Civil Engineers.
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