Water Technologies
Strategies for Water Reuse
in the Food & Beverage Industry
Process Expo
Chicago, IL
November 4, 2011
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Siemens Water Technologies
Topics for Today’s Presentation
I.
II.
III.
IV.
V.
VI.
Page 2
Overview
In-Plant Cascading Water Reuse
Reject Recovery RO’s
Treatment of Plant Effluent Water
Summary
Questions
Siemens Water Technologies
Water is a Global Crisis in the Making
By 2025, Demand for Water Will Exceed Supply
Some other analysts put
this point 10 years earlier
Source: Valmont Water Management Group
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Siemens Water Technologies
Water Reuse - Overview
 Nearly all major Food & Beverage companies have
Sustainability goals related to water and energy
usage
 Water Ratio – Water usage per unit of product
 Energy Ratio – Energy usage per unit of product
 Water conservation and awareness should be the
initial focus, and then water reuse.
 Water Reuse is a key tool for reducing your plant’s
water ratio
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Siemens Water Technologies
Water Reuse - Overview (Continued)
 Identifying water reuse opportunities starts with
a “Water Balance” of your facility
 Metering is needed to identify where water is going
and to measure your success
 First find your water reuse opportunities that
require minimal treatment. These are your “Low
Hanging Fruit”:
 Maximize Condensate Return
 Empty Container Rinse Water
 Any water stream can be reused with enough
treatment. The key is to find the right streams
and the right solution that will provide an
economically justifiable project.
Page 5
Siemens Water Technologies
Topics for Today’s Presentation
I.
II.
III.
IV.
V.
VI.
Page 6
Overview
In-Plant Cascading Water Reuse
Reject Recovery RO’s
Treatment of Plant Effluent Water
Summary
Questions
Siemens Water Technologies
In-Plant Cascading Water Reuse
The easiest and least expensive method of
water reuse is capturing water used in the plant
before it gets contaminated with other waste
streams:
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Carbon Tower Backwash
Multi-Media Backwash
Cooling Water for Compressors
Empty Container Rinse Water
Steam Condensate
Discharge from Container Cooler/Warmer
Pump Seal Water
CIP System Final Rinse
Rainwater
Siemens Water Technologies
In-Plant Cascading Water Reuse

These water streams are easy to capture and require
minimal treatment for reuse
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Match the water quality needed with the water streams that
are available. Some possible uses of reuse water include:
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Irrigation
Cooling Towers
Crate Washing
Warmers/Coolers
Toilet Flushing
Truck Washing
Siemens Water Technologies
Typical Water Treatment System PFD –
With Carbon Tower and Multimedia Backwash Reclaim
Recirculation
Nanofiltration
Or
Reverse Osmosis
City
Water
Multimedia
Filters
To
Drain
To
Distribution
Header
Pumps
UV
Treated
Water
Storage
Carbon
Towers
Polishers
Reject to
Drain
Turbidity
Monitor
Cartridge
Filter
From
Distribution
Header
B/W
Reclaim
Tank
Backwash Reclaim System
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Siemens Water Technologies
Case Study No. 1:
Carbon Tower Backwash Reclaim
Carbonated Soft Drink Plant
 Carbon towers are used to treat
ingredient water at a soft drink facility
 After initial flush to drain, carbon tower
backwash water is captured in a 10,000
gallon storage tank.
 Collected water is re-chlorinated and
filtered by a bag filter and a cartridge
filter to capture any carbon fines.
 Reuse water is blended back into the
incoming city water tank at no more that
10% of total flow.
 Saves 10,000 gallons of water for each
backwash.
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Siemens Water Technologies
Rainwater Harvesting –
General Guidelines
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Use rain water to reduce city water usage in non-critical applications:
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Irrigation
Toilet Flushing
Cooling Applications
Feed water to in-plant water treatment system
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Works best in areas with high annual rainfall
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Recommendation: Capture rainwater from the roof rather than
parking lots due to oils and other contaminants.
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Numerous successful projects in Portland and Seattle areas on
commercial buildings. This trend can be applied to industrial facilities
as well.
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Siemens Water Technologies
Rainwater Harvesting –
Main System Components
Coarse
Filter
System
Controls
Rain
Water
Pump
Skid
Disinfection
System
Water
Users
Collection
Tank
Day
Tank
Cartridge
Filter
City
Water
Backup
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Siemens Water Technologies
Rainwater Harvesting –
Underground Collection Tank
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Siemens Water Technologies
Rainwater Treatment System –
Portland State University – Science and Eng. Bldg.
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Siemens Water Technologies
Case Study No. 2 Rain Water Harvesting and Reuse
Carbonated Soft Drink Facility in Asia
 Rain water is collected, treated, and used to
supplement city water.
 Rain Water Harvesting & Treatment System
Includes:
 In-Ground Rain Water Collection Tanks with
Submersible Pumps – (2)
 Central Collection Tank – 5,000 Gallons
 Transfer Pumps (2)
 Multimedia Filter & Bag Filter
 Treated rain water goes into their incoming city
water tank for treatment by the plant ingredient water
system.
Page 15
Siemens Water Technologies
Topics for Today’s Presentation
I.
II.
III.
IV.
V.
VI.
Page 16
Overview
In-Plant Cascading Water Reuse
Reject Recovery RO’s
Treatment of Plant Effluent Water
Summary
Questions
Siemens Water Technologies
Membrane System Evolution
Timeline for Membrane Filtration:
Recovery Rate
1980’s
Initial Use of Membranes in Beverage
1990’s
Acceptance of Membrane Filtration
75-80%
2000’s
Optimization of Membrane Systems
80-90%
New Generation of Recovery Technology
Future
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70-75%
90-95%
95+%
Siemens Water Technologies
Advantage of using a Reject Recovery RO
80% Recovery
90% Recovery
0.8x
X GPM
0.8x
X GPM
0.2x
0.9x
0.1 x
0.2 x
0.1 x
Standard RO
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RO plus reject recovery RO
Siemens Water Technologies
Typical Water Treatment System PFD –
With Reject Recovery RO
Recirculation
Nanofiltration
Or
Reverse Osmosis
City
Water
From
Distribution
Header
To
Distribution
Header
UV
Multimedia
Filters
Carbon
Towers
Treated
Water
Storage
Break
Tank
Optional
Flow Path
Pumps
Polishers
Recovery
RO
50%
Reject Recovery RO
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Siemens Water Technologies
Case Study Example No. 3 Reject Recovery RO
Non-Carbonated Beverage Facility
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Reject water collected from RO and
Nanofiltration Units
Recovery RO sized for 90 gpm
permeate
Recovery RO cost approximately
$100,000
Annual water savings of 20,000,000
gallons
Annual water savings of $120,000
based on $6 per 1000 gallons for
incoming water and wastewater
treatment
Reject Recovery RO
Payback in about one year!
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Siemens Water Technologies
Reject Recovery RO’s
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Reject Recovery RO’s have become very common in F&B
Facilities with membrane water treatment
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Bottled Water Facilities
Carbonated Soft Drink Facilities
Non-Carbonated Beverage Facilities
Food Production Facilities
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Suitability can be limited based on water chemistry.
Areas with high silica have limited application.
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Don’t run at over 50-60% recovery rate due to high
scaling potential. Water chemistry is critical.
Page 21
Siemens Water Technologies
Topics for Today’s Presentation
I.
II.
III.
IV.
V.
VI.
Page 22
Overview
In-Plant Cascading Water Reuse
Reject Recovery RO’s
Treatment of Plant Effluent Water
Summary
Questions
Siemens Water Technologies
Treatment of Plant Effluent Water
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The technology exists to treat any Food
& Beverage plant wastewater back to
potable water quality. If the plant
already has a wastewater treatment
system, then the economics of water
reuse could be much more favorable.
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Advancements in membrane
technology are making water reuse
more viable.
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Membrane Bioreactors (MBR) is the
leading technology for wastewater
reuse.
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Siemens Water Technologies
Defining Requirements for Water Reuse
Objectives of treatment:
To remove contaminates (organics, inorganics, suspended, dissolved) to
a quality for beneficial reuse.
Typical Processes:
 Removing Organics – Biological Degradation (anaerobic/aerobic),
increased use of MBR or UF polishing
 Remove Suspended Particles – Clarification and Filtration,
increased use of MF and UF membranes
 Remove Inorganic Dissolved Constituents - Reverse Osmosis,
Microfiltration Softening, Demineralization (increasingly, Integrated
Membrane Systems (UF+RO+CDI))
 Disinfection (pathogen inactivation) – Chlorine, UV, Ozone
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Siemens Water Technologies
What is a Membrane Bioreactor?
The substitution of a membrane separation process for activated sludge
secondary clarification and tertiary filtration.
Membrane Bioreactor
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Siemens Water Technologies
MBR
MBR (Membrane Bio Reactor) process uses membranes as an absolute barrier with very small pore size which
gives a very clear treated water.
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Siemens Water Technologies
Water Reuse Solutions
Page 27
Siemens Water Technologies
Case Study Example No. 4 –
Effluent Water Reuse System
Carbonated Beverage Facility
Incoming
Plant Water
F&B Plant
To Non-Ingredient
Water Uses
Potable
Reuse
Water
65 GPM
Chlorinated
Storage
Wastewater
Treatment
(SBR)
Reverse
Osmosis
To Sewer
UltraFiltration
Prescreen
Chlorination
Reject to
Drain
Topics for Today’s Presentation
I.
II.
III.
IV.
V.
VI.
Page 29
Overview
In-Plant Cascading Water Reuse
Reject Recovery RO’s
Treatment of Plant Effluent Water
Summary
Questions
Siemens Water Technologies
Water Reuse - Summary
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The economics of water reuse can vary widely depending
on your circumstances:
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Cost of water and sewage in your location
Availability of water (limitations on production)
Volume of water used in your facility
Impact of droughts on your region
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Public acceptance of water reuse in the Food & Beverage
industry is limited. Currently projects are only for noningredient applications.
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Consider all of your water streams when looking for water
minimization and water reuse opportunities (see next
slide).
Page 30
Siemens Water Technologies
Water Reuse Solutions (Industrial – F&B) Summary
Water Sources
to be Reused
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Carbon Tower B/W
Multi-media B/W
Cooling Water
Container Rinse Water
Warmers / Coolers
Line Lube
CIP Water
Pump Seal Water
Rain Water
Treated Wastewater
Page 31
Reclaimed
Water Users
Treatment
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Multi-Media
Microfiltration
Ultrafiltration
Reverse Osmosis
Membrane Bioreactor
Biological Treatment
Clarification
UV Disinfection
Ozonation
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Cooling Water
Toilet Flushing
Irrigation
Process Water System
Cooling Towers
Wash Down
Truck Washing
Warmers / Coolers
Boiler Feed Water
Siemens Water Technologies
Water Reuse - Summary
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Interest in water reuse is expected to grow
dramatically in the near future.
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Water reuse opportunities can be simple or
quite complicated depending on the
application.
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Siemens Industry, Inc. can help you
identify your potential water savings and
reuse opportunities and apply the
appropriate solutions.
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Siemens Water Technologies
Questions?
Page 33
Siemens Water Technologies
Thank You
David Bridgers
F&B National Account Manager
Siemens Industry, Inc.
Water Technologies Business Unit
Atlanta, GA
Phone: 770-921-1837
Mobile: 404-414-8765
E-mail: david.bridgers@siemens.com
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Siemens Water Technologies