BREWERY WASTE WATER RECYCLING
A CASE STUDY
World Brewing Congress
Portland, Oregon, USA
July 28-August 1 2012
Michael Eumann
EUWA Water Treatment Plants
Agenda
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Sustainability targets
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Water consumption figures
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Potential users for recycled water
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Target values for recycled water ( service water)
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Case Study Design Information
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Flow Diagram
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Performance data
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Summary
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Outlook
Sustainability Targets: Water
1. ABInBev:
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Cut water consumption by 30 % by 2012 from 2007
Latest number 2011: 3.71 hl/hl,
 Target 3.5 hl/hl.
(ABInBev Press Release, 15.03.2010)
2. SABMiller:
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Cut water consumption by 25 % by 2015 from 2008,
Latest number 2011: 4.0 hl/hl,
 Target 3.5 hl/hl.
(SABMiller Position Paper – Water, March 2009)
3. Heineken:
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Cut water consumption by at least 25 % by 2020 from 2008,
Latest number 2011: 4.3 hl/hl,
 Target 3.7 hl/hl.
(Heineken press release 13.04.2010 and Heineken Sustainability Report 2009)
Water Consumption Figures
Water consumption
(l/hl beer)
Measures
Standard practice
500
Good practice
375
Optimisation
Good practice with waste
water recycling
300
Reuse of water
limited
200x1-225
Reuse of water
including rinse
waters
Best practice with waste water
recycling
x1: Figure published at VLB-convention March 2010
Water Consumption Figures:
Water treatment
Else
Boiler feed water
15
8
20
Brewhouse (without CIP)
55
CIP (total)
107
85
Filling (without CIP)
25
17
43
Dilution water
Filtration (without CIP)
Fermentation and maturation
(without CIP)
All values given in l/hl; In total: approx. 375 l/hl.
Potential users for recycled water
I.: No direct or indirect product contact
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Full bottle and can rinsing,
Crate washing,
CO2-Recovery (washing),
Vacuum pumps,
Make-up water, e.g. for cleaning and disinfection,
Boiler feed water,
Condensers and cooling towers,
Administration,
Fire fighting,
Irrigation.
 Total amount: approx. 75 l/hl.
Potential users for recycled water
II.: No direct product contact (but final rinse allowed), additionally
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CIP final rinse water,
Bottle washer,
Bottle and can rinser.
 Total amount: approx. 175 l/hl.
Potential users for recycled water
III.: Feeding back into the raw water inlet:
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Limitation only by the max. yield of the waste water
recovery plant.
Waste water recycling
Well,
Municipal water supply,
Surface water
Brewery
Water treatment
Waste water treatment
River, lake
Service water
For CIP, packaging and cooling towers:
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Needs to meet drinking water standards (WHO or company
specifications).
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Special attention to:
• Total hardness ( precipitation),
• Chloride level ( stainless steel corrosion),
• pH-value (for mild steel piping, reservoirs, valves),
• Microbiology.
Case Study – Design Information
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Brewery South America: Design capacity 8 Mio hl/y
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Water scarce area, original water consumption 3.7 hl/hl
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Existing waste water treatment plant consisting of anaerobic
and aerobic treatment, clarifier
Case Study – Design Information
Waste water recycling plant capacity 125 m³/h
Main components
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Ultrafiltration
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Reverse osmosis
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Disinfection
Design Information
1. Removal of particles and microorganisms
 Microfiltration, ultrafiltration
2. Demineralisation
 Reverse osmosis (RO)
3. Disinfection
 Chlorination
1. Removal of particles and microorganisms
• Particles, turbidity and microorganisms (
activated sludge) have to be removed.
• Typically achieved by membrane technology
(microfiltration (MF) or ultrafiltration (UF)).
2. Demineralisation
Demineralisation necessary for most service water
applications to remove
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Total hardness and m-alkalinity,
Chloride,
Total dissolved solids (TDS).
Demineralisation may not be necessary for all
applications (irrigation).
3. Final disinfection
NaOCl is used for disinfection
Economic solution in terms of investment and
operation costs
Potential byproducts not critical as there is no
product contact
ClO2 as an alternative if byproducts are
critical
WASTEWATER RECYCLING FLOW DIAGRAM
ULTRAFILTRATION
WASTE
WATER
TANK
Chemical
dosing
INTERMEDIATE
WATER TANK
Cleaning
chemicals
Disinfection
Boiler
feed water
REVERSE OSMOSIS
RECLAIMED
WATER
TANK
Chemical
dosing
Reclaimed water
to consumers
125m3/h, South America, 8 million hl/a brewery
Treated water quality
Parameters
pH
TH
Ca
Mg
HCO3
Cl
SO4
TDS
odH
mg/l
mg/l
mg/l CaCO3
mg/l
mg/l
mg/l
WWTP effluent
Recycled water
8.05
28
88
15
1244
351
17.3
2281
6.5
n.d.
n.d.
n.d.
86
21
n.d.
92
Efficiency
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Water recovery rates:
• UF: > 90 %,
• RO: up to 70 %,
 overall yield > 60 %.
 Mainly RO determines the efficiency of the recycling plant,
depending on
• SiO2,
• PO43-,
• m-Alkalinity,
• Organics.
Operating Cost
UF Cleaning Chemicals
0.6 cents/m³ treated water
RO Conditioning Chemicals
5.0 cents/m³ treated water
Treated Water Conditioning Chemicals
2.9 cents/m³ treated water
Power consumption
9.5 cents/m³ treated water
Total
18.0 cents/m³ treated water
Impact on Waste Water Composition
Increase in concentration of e.g.
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COD,
PO43-,
TDS.
 Legal limits to be considered.
Summary and outlook
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Brewery waste water recycling is the only way to reduce the
overall water consumption in order to achieve sustainability
targets in future.
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Drinking water standards can be reached without problems.
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Recycled water users have to be determined prior to the run up
phase of the project.
THANK YOU FOR YOUR ATTENTION
www.euwa.com