Abstract
Research Article| June 06 2014 Total photosynthetic pigments in addition to turbidity during the selection of coagulant treatments: a drinking water treatment perspective H. Ewerts; H. Ewerts 1Rand Water Analytical Services, PO Box 3526, Vereeniging 1930, South Africa E-mail: hendrik.ewerts50@gmail.com; hewerts@randwater.co.za Search for other works by this author on: This Site PubMed Google Scholar A. Swanepoel; A. Swanepoel 1Rand Water Analytical Services, PO Box 3526, Vereeniging 1930, South Africa Search for other works by this author on: This Site PubMed Google Scholar H. H. du Preez; H. H. du Preez 1Rand Water Analytical Services, PO Box 3526, Vereeniging 1930, South Africa2Department of Zoology, University of Johannesburg, Auckland Park, South Africa Search for other works by this author on: This Site PubMed Google Scholar N. Van der Walt N. Van der Walt 1Rand Water Analytical Services, PO Box 3526, Vereeniging 1930, South Africa Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2015) 64 (1): 1–9. https://doi.org/10.2166/aqua.2014.020 Article history Received: February 20 2014 Accepted: May 19 2014 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation H. Ewerts, A. Swanepoel, H. H. du Preez, N. Van der Walt; Total photosynthetic pigments in addition to turbidity during the selection of coagulant treatments: a drinking water treatment perspective. Journal of Water Supply: Research and Technology-Aqua 1 February 2015; 64 (1): 1–9. doi: https://doi.org/10.2166/aqua.2014.020 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Total photosynthetic pigments (TPP) or chlorophyll-a analysis can be useful in selecting coagulant treatments that will improve phytoplankton removal and reduce treatment costs. The objectives of this study were to compare the efficacy of phytoplankton and turbidity removal when using TPP and turbidity as indicator parameters of appropriate coagulant treatments as well as to evaluate the cost impacts thereof. During seven different sampling occasions, source water samples with substantially different TPP and turbidity contents were collected from two South African freshwater sources (Benoni Lake and Vaal Dam) to conduct jar stirring tests. After sedimentation, TPP and turbidity analyses were performed to assess the efficacy of coagulant treatments (Ca(OH)2-SiO2, Ca(OH)2-organic polymer and organic polymer). Results showed that TPP analysis is indeed a useful indicator parameter to consider purifying source water enriched with phytoplankton. Ca(OH)2-organic polymer treatment was more costly than Ca(OH)2-SiO2 and organic polymer, but the only coagulant treatment that met the removal criteria after sedimentation. Benoni Lake source water (TPP: 34.29 μg/l; 4.29 NTU) was more costly to treat than Vaal Dam source water (TPP: 2.29 μg/l; 80.29 NTU). Findings made from this study confirm that high phytoplankton concentrations in source water due for treatment will increase the treatment costs. chlorophyll, jar stirring tests, water purification © IWA Publishing 2015 You do not currently have access to this content.
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