Presentation on theme: "Michael Eumann EUWA Water Treatment Plants World Brewing Congress Portland, Oregon, USA July 28-August 1 2012 BREWERY WASTE WATER RECYCLING A CASE STUDY."— Presentation transcript:
Michael Eumann EUWA Water Treatment Plants World Brewing Congress Portland, Oregon, USA July 28-August 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 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, )
Water consumption (l/hl beer) Measures Standard practice500 Good practice375Optimisation Good practice with waste water recycling 300Reuse of water limited Best practice with waste water recycling 200 x1 -225Reuse 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, CO 2 -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 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 Information
Waste water recycling plant capacity 125 m³/h Main components -Ultrafiltration -Reverse osmosis -Disinfection Case 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 DIAGRAM Boiler feed water
125m 3 /h, South America, 8 million hl/a brewery
Treated water quality Parameters WWTP effluentRecycled water pH TH Ca Mg HCO 3 Cl SO 4 TDS o dH mg/l mg/l CaCO 3 mg/l n.d 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 SiO 2, PO 4 3-, 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, PO 4 3-, 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.