Michael EumannMichael EumannEUWA Water Treatment PlantsEUWA Water Treatment Plants
World Brewing CongressWorld Brewing CongressPortland, Oregon, USAPortland, Oregon, USAJuly 28-August 1 2012July 28-August 1 2012
BREWERY WASTE WATER RECYCLING
A CASE STUDY
Agenda
• Sustainability targets
• Water consumption figures
• Potential users for recycled water
• Target values for recycled water ( service water)
• Case Study Design Information
• Flow Diagram
• Performance data
• Summary
• Outlook
Sustainability Targets: Water
3. Heineken:• 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)
2. SABMiller:• 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)
1. ABInBev:• 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)
Water consumption
(l/hl beer)Measures
Standard practice 500
Good practice 375 Optimisation
Good practice with waste water recycling
300 Reuse of water limited
Best practice with waste water recycling
200x1-225 Reuse of water including rinse
waters
x1: Figure published at VLB-convention March 2010
Water Consumption Figures
Water Consumption Figures:
All values given in l/hl; In total: approx. 375 l/hl.
Water treatment
Brewhouse (without CIP)
CIP (total)
Boiler feed water
Else
Dilution water
Fermentation and maturation
(without CIP)
Filtration (without CIP)
Filling (without CIP)
Potential users for recycled water
I.: No direct or indirect product contact
• 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.
II.: No direct product contact (but final rinse allowed), additionally
• 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:
• Limitation only by the max. yield of the waste water recovery plant.
Potential users for recycled water
Water treatment
Brewery Waste water treatment
Waste water recycling
River, lake
Well,Municipal water supply,
Surface water
For CIP, packaging and cooling towers:
• Needs to meet drinking water standards (WHO or company
specifications).
• Special attention to:
• Total hardness ( precipitation),
• Chloride level ( stainless steel corrosion),
• pH-value (for mild steel piping, reservoirs, valves),
• Microbiology.
Service waterService water
- Brewery South America: Design capacity 8 Mio hl/y
- Water scarce area, original water consumption 3.7 hl/hl
- Existing waste water treatment plant consisting of anaerobic
and aerobic treatment, clarifier
Case Study – Design InformationCase Study – Design Information
Waste water recycling plant capacity 125 m³/h
Main components
- Ultrafiltration
- Reverse osmosis
- Disinfection
Case Study – Design InformationCase Study – Design Information
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
• 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 DIAGRAMWASTEWATER RECYCLING FLOW DIAGRAM
Boiler feed water
WASTE WATER TANK
REVERSE OSMOSIS
Reclaimed water to consumers
Disinfection
INTERMEDIATE WATER TANK
RECLAIMED WATER TANK
Chemical dosing
Chemical dosing
Cleaning chemicals
ULTRAFILTRATION
125m3/h, South America, 8 million hl/a brewery
Treated water qualityTreated water quality
Parameters WWTP effluent Recycled water
pHTHCaMgHCO3
ClSO4
TDS
odHmg/l mg/l mg/l CaCO3
mg/l mg/l mg/l
8.05288815
124435117.32281
6.5n.d.n.d.n.d.8621
n.d.92
Efficiency
• 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.
• COD,
• PO43-,
• TDS.
Legal limits to be considered.
Summary and outlook
• Brewery waste water recycling is the only way to reduce the overall water consumption in order to achieve sustainability targets in future.
• Drinking water standards can be reached without problems.
• Recycled water users have to be determined prior to the run up phase of the project.
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