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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THANK YOU FOR YOUR ATTENTIONTHANK YOU FOR YOUR ATTENTION