MWEA Technology Transfer
May 11, 2017
Membrane System Basics
Mark Prein
Membrane System Basics
• Background
• Design Considerations
• Maintenance and Replacement
Source: Water Environment Federation, Fundamentals of Membrane Bioreactors Part 1: MBR
Membrane and Process Fundamentals. Online Webinar; March 2012 (Accessed May 2017)
What is a Membrane?
Membrane Rejection
Dissolved salts
Suspended solids
Colloids
Viruses
Bacteria
Parasites
Org. macro. molecules
0.0001
0.001
0.01
0.1
polio
virus
Reverse Osmosis
1
smallest
microorganis
m
Cryptosporidium
Ultrafiltration
Nanofiltration
hair
Sand filtration
Microfiltration
ZeeWeed (UF)
100mm
10
MF
Where do they fit in?
Wikipedia - Anja Drews
Types of Membranes
Types of Membranes
Types of Membranes
ZeeWeed® 500d – Cassette
Membrane Tanks
Design
Considerations
Footprint
Headworks – Screens
Fine Screen
Pump To vs. Pump From Membrane Tanks
Pump To
•
•
•
•
•
More RAS Flow
Bioreactors are Storage
More Response Time
Pump Thinner RAS
Easier to Control Flows
Pump From
•
•
•
•
•
Less RAS flow
Limited Storage
Less Response Time
Pump Thicker RAS
Harder to control Flows
What MLSS?
What MLSS?
Water Advocates
Membrane Tanks
Firm Capacity
Pump Gallery
Pump Gallery
Membrane Train Control
Maintenance &
Replacement
Maintenance - Equipment
Membrane Management
Energy Intensity
Least amount of cleaning to maintain function & extend life
•
•
•
•
Relax with Air Scour
Backpulse
Maintenance Clean
Recovery Clean
Membrane Module
Breakage
Membrane Module Sludging
Membrane Replacement
Membrane Life
GMRP/GRP
Handling Area
Questions?