Field based pilot-scale drinking water distribution system: Simulation of long hydraulic retention times and microbiological mediated monochloramine decay
| Autor: | Adam Medlock, Barbara Drigo, Veerdhawal Kulkarni, John Awad, Paul Monis, Melody Lau, John van Leeuwen |
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| Přispěvatelé: | Kulkarni, Veerdhawal, Awad, John, Medlock, Adam, Monis, Paul, Lau, Melody, Drigo, Barbara, van Leeuwen, John |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Microflora Clinical Biochemistry Alkalinity Pilot distribution system 010501 environmental sciences Minimal supervision 01 natural sciences Distribution system Simulated pilot distribution system 03 medical and health sciences Microbiological monochloramine decay Engineering Field based lcsh:Science 0105 earth and related environmental sciences ComputingMethodologies_COMPUTERGRAPHICS Chemical treatment Pilot scale food and beverages Pulp and paper industry hydraulic retention times 8amicrobiological monochloramine decay draw and fill system Medical Laboratory Technology 030104 developmental biology Hydraulic retention times Environmental science lcsh:Q Water treatment Nitrification microflora Draw & fill system Fm test |
| Zdroj: | MethodsX MethodsX, Vol 5, Iss, Pp 684-696 (2018) |
| ISSN: | 2215-0161 |
| Popis: | Graphical abstract Drinking water distribution systems with long hydraulic retention times (HRTs) commonly encounter rapid microbiological-mediated monochloramine decay that results in microbial regrowth and nitrification with reduction in alkalinity. In this paper, we report the design and operation of a field-based pilot-scale distribution system (PDS) operated at flows that simulate long HRTs (∼10 days) to promote rapid microbiological monochloramine decay over long periods. The PDS is designed to enable the testing of chemical treatment for the control of nitrification and monochloramine decay. The PDS has two identical cylindrical polyethylene tanks (DS1 & DS2), each of 1 m diameter and 1.8 m height (∼1 kL) holding 900 m of polyethylene (PE) tubing with sampling points every 300 m intervals. Microbial mediated decay (determined by the Fm test) of monochloramine occurred as treated (alum coagulated and flocculated) and chloraminated water passed through the DSs. In this manuscript we report: • An inexpensive, flexible and compact system that can be readily set-up at a full-scale water treatment plant, requiring minimal supervision for operation. • A ‘draw & fill’ system for achieving control on HRT’s through the pipes. |
| Databáze: | OpenAIRE |
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