Presentation on theme: "BREWERY WASTE WATER RECYCLING A CASE STUDY"— Presentation transcript:
1 BREWERY WASTE WATER RECYCLING A CASE STUDY World Brewing CongressPortland, Oregon, USAJuly 28-AugustMichael EumannEUWA Water Treatment Plants1
2 Agenda Sustainability targets Water consumption figures Potential users for recycled waterTarget values for recycled water ( service water)Case Study Design InformationFlow DiagramPerformance dataSummaryOutlook
3 Sustainability Targets: Water 1. ABInBev:Cut water consumption by 30 % by 2012 from 2007Latest number 2011: hl/hl, Target 3.5 hl/hl.(ABInBev Press Release, )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)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 and Heineken Sustainability Report 2009)
4 Water Consumption Figures (l/hl beer)MeasuresStandard practice500Good practice375OptimisationGood practice with waste water recycling300Reuse of water limitedBest practice with waste water recycling200x1-225Reuse of water including rinse watersx1: Figure published at VLB-convention March 2010
5 Water Consumption Figures: Water treatmentElseBoiler feed waterBrewhouse (without CIP)CIP (total)Dilution waterFilling (without CIP)Filtration (without CIP)Fermentation and maturation(without CIP)All values given in l/hl; In total: approx. 375 l/hl.
6 Potential users for recycled water I.: No direct or indirect product contactFull 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.
7 Potential users for recycled water II.: No direct product contact (but final rinse allowed), additionallyCIP final rinse water,Bottle washer,Bottle and can rinser.Total amount: approx. 175 l/hl.
8 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.Water treatmentBreweryWaste water treatmentWaste water recyclingRiver, lakeWell,Municipal water supply,Surface water
9 Service 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.99
10 Case Study – Design Information Brewery South America: Design capacity 8 Mio hl/yWater scarce area, original water consumption 3.7 hl/hlExisting waste water treatment plant consisting of anaerobic and aerobic treatment, clarifier1010
11 Case Study – Design Information Waste water recycling plant capacity 125 m³/hMain componentsUltrafiltrationReverse osmosisDisinfection1111
12 Design Information 1. Removal of particles and microorganisms Microfiltration, ultrafiltration2. Demineralisation Reverse osmosis (RO)3. Disinfection Chlorination
13 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)).
14 2. DemineralisationDemineralisation necessary for most service water applications to removeTotal hardness and m-alkalinity,Chloride,Total dissolved solids (TDS).Demineralisation may not be necessary for all applications (irrigation).
15 3. Final disinfection NaOCl is used for disinfection Economic solution in terms of investment and operation costsPotential byproducts not critical as there is no product contactClO2 as an alternative if byproducts are critical
16 WASTEWATER RECYCLING FLOW DIAGRAM WASTE WATER TANKREVERSE OSMOSISReclaimed water to consumersDisinfectionINTERMEDIATE WATER TANKRECLAIMED WATER TANKChemical dosingCleaning chemicalsULTRAFILTRATIONBoiler feed water
19 Treated water quality Parameters WWTP effluent Recycled water pH TH Ca MgHCO3ClSO4TDSodHmg/lmg/l CaCO38.05288815124435117.322816.5n.d.86219219
20 Efficiency Water recovery rates: UF: > 90 %, RO: up to 70 %, overall yield > 60 %.Mainly RO determines the efficiency of the recycling plant, depending onSiO2,PO43-,m-Alkalinity,Organics.
21 Operating Cost UF Cleaning Chemicals 0.6 cents/m³ treated water RO Conditioning Chemicals cents/m³ treated waterTreated Water Conditioning Chemicals cents/m³ treated waterPower consumption cents/m³ treated waterTotal cents/m³ treated water
22 Impact on Waste Water Composition Increase in concentration of e.g.COD,PO43-,TDS. Legal limits to be considered.
23 Summary and outlookBrewery 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.