Application of enhanced assimilable organic carbon method across operational drinking water systems
| Autor: | Graeme Moore, Joby Boxall, Catherine A. Biggs, Frances C. Pick, Katherine E. Fish, Jonathan P. Moses |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Water Management Science Cell Enumeration Techniques 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Bacterial growth Research and Analysis Methods Pseudomonas fluorescens 01 natural sciences Water Purification Distribution system Spectrum Analysis Techniques Natural Resources Water Quality Organic Chemicals 0105 earth and related environmental sciences Total organic carbon Multidisciplinary Bacteria Drinking Water Ecology and Environmental Sciences Organisms Biology and Life Sciences Total Cell Counting Reproducibility of Results Spirillum Flow Cytometry Pulp and paper industry Carbon 020801 environmental engineering Chemistry Spectrophotometry Physical Sciences Water Resources Engineering and Technology Medicine Environmental science Water treatment Cytophotometry Water quality Chlorine Water Microbiology Research Article Chemical Elements |
| Zdroj: | PLoS ONE, Vol 14, Iss 12, p e0225477 (2019) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | Assimilable organic carbon (AOC) is known to correlate with microbial growth, which can consequently degrade drinking water quality. Despite this, there is no standardised AOC test that can be applied to drinking water distribution systems (DWDS). Herein we report the development of a quick, robust AOC that incorporates known strains Pseudomonas fluorescens strain P-17 and Spirillum strain NOX, a higher inoculum volume and enumeration using flow cytometry to generate a quicker (total test time reduced from 14 to 8 days), robust method. We apply the developed AOC test to twenty drinking water treatment works (WTW) to validate the method reproducibility and resolution across a wide range of AOC concentrations. Subsequently, AOC was quantified at 32 sample points, over four DWDS, for a year in order to identify sinks and sources of AOC in operative networks. Application of the developed AOC protocol provided a previously unavailable insight and novel evidence of pipes and service reservoirs exhibiting different AOC and regrowth behaviour. Observed correlations between AOC and microbial growth highlight the importance of monitoring AOC as an integral part of managing drinking water quality at the consumers tap. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|