A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Membrane Integrity Monitoring with Distributed Laser Turbidimetry
The objective of this study was to determine whether distributed laser light‐scattering turbidimetry is a viable approach for monitoring membrane integrity. The study consisted of two phases. Phase 1 measured the sensitivity and minimum detection levels of four monitoring instruments. Phase 2 determined the minimum breach size (and corresponding log removal) required for detecting a change in water quality for each instrument. The water quality used in phase 1 was controlled using quantifiable particle count addition with 0.026‐, 1.0‐ and 5.0‐μm fluorescing microspheres. Membrane integrity monitoring was studied in phase 2 by feeding an increasingly breached membrane with either raw water or water pretreated by coagulation/settling and either known concentrations of 5.0‐μm microspheres or powdered activated carbon (PAC). The results indicate that distributing existing technology sensors throughout a membrane rack may provide greater benefits than working to increase the sensitivity of a single detector. Also, laser light source turbidimeters are more sensitive than white light source turbidimeters or particle counters when raw or PAC‐amended water is considered.
Membrane Integrity Monitoring with Distributed Laser Turbidimetry
The objective of this study was to determine whether distributed laser light‐scattering turbidimetry is a viable approach for monitoring membrane integrity. The study consisted of two phases. Phase 1 measured the sensitivity and minimum detection levels of four monitoring instruments. Phase 2 determined the minimum breach size (and corresponding log removal) required for detecting a change in water quality for each instrument. The water quality used in phase 1 was controlled using quantifiable particle count addition with 0.026‐, 1.0‐ and 5.0‐μm fluorescing microspheres. Membrane integrity monitoring was studied in phase 2 by feeding an increasingly breached membrane with either raw water or water pretreated by coagulation/settling and either known concentrations of 5.0‐μm microspheres or powdered activated carbon (PAC). The results indicate that distributing existing technology sensors throughout a membrane rack may provide greater benefits than working to increase the sensitivity of a single detector. Also, laser light source turbidimeters are more sensitive than white light source turbidimeters or particle counters when raw or PAC‐amended water is considered.
Membrane Integrity Monitoring with Distributed Laser Turbidimetry
Carr, Mary C. (author) / Carlson, Kenneth H. (author) / Sadar, Michael (author)
Journal ‐ American Water Works Association ; 95 ; 83-94
2003-06-01
12 pages
Article (Journal)
Electronic Resource
English
| Wiley | 1922
Dispersed particle size characterization by in-line turbidimetry during polymer extrusion
| British Library Online Contents | 2018
Distributed Fiber-Optic Sensing and Integrity Monitoring
| British Library Online Contents | 2010