Membrane Technology (Reverse Osmosis)
Membrane Technology Overview (7 hours) Instructor – Kelly Franks
The intent of this workshop is to provide the attendees with a general technical overview of the varying types of membrane treatment available for drinking water, including:
-Microfiltration
-Ultrafiltration
-Nanofiltration
-Reverse Osmosis
Applications, advantages, disadvantages, operator involvement and maintenance will be discussed for each technology
- Introduction: (1 hour)
Water contaminants overview
-Ions
-Gases
-Organics
-reading and analysing a water analysis
Osmosis and Reverse Osmosis (nanofiltration) (1 hour)
-Osmotic Pressure
-applied pressure
-net driving pressure
-water flux
-salt flux
-Organics
-difference/similarities between Reverse Osmosis and Nanofiltration
-applications and limitations
Microfiltration and Ultrafiltration
-applications and limitations
-difference/similarities between Micro and Ultrafiltration
- Membrane elements, modules and vessels (1 hour)
-Envelopes
-feed water spacer
-Permeate spacer
-flow path
-single stage, multi-stage
-single pass, double pass
- Reverse Osmosis Unit operation (1 hour)
RO unit operation
-Recovery rate
-Concentrations
-Water flux per element
-Net driving Pressure/element (NDP)
-Salt passage (SP)/element
-NDP and SP versus temperature
- Pretreatment Options (1 hour)
-minimizing scaling and fouling
-antiscalant projections and injection
-acid injection
-cartridge filtration
-microfiltration and ultrafiltration
-Manganese Greensand Vs. Biological filtration
- Membrane cleaning (1 hour)
-low pH
-high pH
-temperature
-element tolerances
-quantifying success
- Daily Monitoring (1 hour)
-normalizer permeate flow (NPF)
-Normalized Salt Passage (NSP)
-Normalized pressure drop
-Normalized differential pressure
Questions and discussions.
