Presentation on theme: "Page 1 Siemens Water Technologies Water Technologies Strategies for Water Reuse in the Food & Beverage Industry Process Expo Chicago, IL November 4, 2011."— Presentation transcript:
Page 1 Siemens Water Technologies Water Technologies Strategies for Water Reuse in the Food & Beverage Industry Process Expo Chicago, IL November 4, 2011
Page 2 Siemens Water Technologies Topics for Today’s Presentation I. Overview II. In-Plant Cascading Water Reuse III. Reject Recovery RO’s IV. Treatment of Plant Effluent Water V. Summary VI. Questions
Page 3 Siemens Water Technologies Water is a Global Crisis in the Making By 2025, Demand for Water Will Exceed Supply Source: Valmont Water Management Group Some other analysts put this point 10 years earlier
Page 4 Siemens Water Technologies Water Reuse - Overview Nearly all major Food & Beverage companies have Sustainability goals related to water and energy usage Water Ratio – Water usage per unit of product Energy Ratio – Energy usage per unit of product Water conservation and awareness should be the initial focus, and then water reuse. Water Reuse is a key tool for reducing your plant’s water ratio
Page 5 Siemens Water Technologies Water Reuse - Overview (Continued) Identifying water reuse opportunities starts with a “Water Balance” of your facility Metering is needed to identify where water is going and to measure your success First find your water reuse opportunities that require minimal treatment. These are your “Low Hanging Fruit”: Maximize Condensate Return Empty Container Rinse Water Any water stream can be reused with enough treatment. The key is to find the right streams and the right solution that will provide an economically justifiable project.
Page 6 Siemens Water Technologies Topics for Today’s Presentation I. Overview II. In-Plant Cascading Water Reuse III. Reject Recovery RO’s IV. Treatment of Plant Effluent Water V. Summary VI. Questions
Page 7 Siemens Water Technologies In-Plant Cascading Water Reuse The easiest and least expensive method of water reuse is capturing water used in the plant before it gets contaminated with other waste streams: Carbon Tower Backwash Multi-Media Backwash Cooling Water for Compressors Empty Container Rinse Water Steam Condensate Discharge from Container Cooler/Warmer Pump Seal Water CIP System Final Rinse Rainwater
Page 8 Siemens Water Technologies In-Plant Cascading Water Reuse These water streams are easy to capture and require minimal treatment for reuse Match the water quality needed with the water streams that are available. Some possible uses of reuse water include: Irrigation Cooling Towers Crate Washing Warmers/Coolers Toilet Flushing Truck Washing
Page 9 Siemens Water Technologies Typical Water Treatment System PFD – With Carbon Tower and Multimedia Backwash Reclaim Multimedia Filters Treated Water Storage To Distribution Header Polishers City Water Pumps Carbon Towers Nanofiltration Or Reverse Osmosis UV Recirculation B/W Reclaim Tank To Drain Turbidity Monitor From Distribution Header Cartridge Filter Backwash Reclaim System Reject to Drain
Page 10 Siemens Water Technologies Case Study No. 1: Carbon Tower Backwash Reclaim Carbonated Soft Drink Plant Carbon towers are used to treat ingredient water at a soft drink facility After initial flush to drain, carbon tower backwash water is captured in a 10,000 gallon storage tank. Collected water is re-chlorinated and filtered by a bag filter and a cartridge filter to capture any carbon fines. Reuse water is blended back into the incoming city water tank at no more that 10% of total flow. Saves 10,000 gallons of water for each backwash.
Page 11 Siemens Water Technologies Rainwater Harvesting – General Guidelines Use rain water to reduce city water usage in non-critical applications: Irrigation Toilet Flushing Cooling Applications Feed water to in-plant water treatment system Works best in areas with high annual rainfall Recommendation: Capture rainwater from the roof rather than parking lots due to oils and other contaminants. Numerous successful projects in Portland and Seattle areas on commercial buildings. This trend can be applied to industrial facilities as well.
Page 12 Siemens Water Technologies Rainwater Harvesting – Main System Components Collection Tank Day Tank Rain Water Cartridge Filter Pump Skid Water Users Disinfection System City Water Backup Coarse Filter System Controls
Page 13 Siemens Water Technologies Rainwater Harvesting – Underground Collection Tank
Page 14 Siemens Water Technologies Rainwater Treatment System – Portland State University – Science and Eng. Bldg.
Page 15 Siemens Water Technologies Case Study No. 2 - Rain Water Harvesting and Reuse Carbonated Soft Drink Facility in Asia Rain water is collected, treated, and used to supplement city water. Rain Water Harvesting & Treatment System Includes : In-Ground Rain Water Collection Tanks with Submersible Pumps – (2) Central Collection Tank – 5,000 Gallons Transfer Pumps (2) Multimedia Filter & Bag Filter Treated rain water goes into their incoming city water tank for treatment by the plant ingredient water system.
Page 16 Siemens Water Technologies Topics for Today’s Presentation I. Overview II. In-Plant Cascading Water Reuse III. Reject Recovery RO’s IV. Treatment of Plant Effluent Water V. Summary VI. Questions
Page 17 Siemens Water Technologies Membrane System Evolution Timeline for Membrane Filtration:Recovery Rate 1980’sInitial Use of Membranes in Beverage70-75% 1990’sAcceptance of Membrane Filtration75-80% 2000’sOptimization of Membrane Systems80-90% New Generation of Recovery Technology90-95% Future95+%
Page 18 Siemens Water Technologies Advantage of using a Reject Recovery RO 90% Recovery 0.1 x 0.9x X GPM RO plus reject recovery RO 0.8x 0.2x 0.1 x 80% Recovery 0.2 x X GPM Standard RO 0.8x
Page 19 Siemens Water Technologies Typical Water Treatment System PFD – With Reject Recovery RO Multimedia Filters Treated Water Storage To Distribution Header Polishers City Water Pumps Carbon Towers Nanofiltration Or Reverse Osmosis UV Recirculation Recovery RO 50% Break Tank From Distribution Header Reject Recovery RO Optional Flow Path
Page 20 Siemens Water Technologies Non-Carbonated Beverage Facility Case Study Example No. 3 - Reject Recovery RO Reject water collected from RO and Nanofiltration Units Recovery RO sized for 90 gpm permeate Recovery RO cost approximately $100,000 Annual water savings of 20,000,000 gallons Annual water savings of $120,000 based on $6 per 1000 gallons for incoming water and wastewater treatment Payback in about one year! Reject Recovery RO
Page 21 Siemens Water Technologies Reject Recovery RO’s Reject Recovery RO’s have become very common in F&B Facilities with membrane water treatment Bottled Water Facilities Carbonated Soft Drink Facilities Non-Carbonated Beverage Facilities Food Production Facilities Suitability can be limited based on water chemistry. Areas with high silica have limited application. Don’t run at over 50-60% recovery rate due to high scaling potential. Water chemistry is critical.
Page 22 Siemens Water Technologies Topics for Today’s Presentation I. Overview II. In-Plant Cascading Water Reuse III. Reject Recovery RO’s IV. Treatment of Plant Effluent Water V. Summary VI. Questions
Page 23 Siemens Water Technologies Treatment of Plant Effluent Water The technology exists to treat any Food & Beverage plant wastewater back to potable water quality. If the plant already has a wastewater treatment system, then the economics of water reuse could be much more favorable. Advancements in membrane technology are making water reuse more viable. Membrane Bioreactors (MBR) is the leading technology for wastewater reuse.
Page 24 Siemens Water Technologies Defining Requirements for Water Reuse Objectives of treatment: To remove contaminates (organics, inorganics, suspended, dissolved) to a quality for beneficial reuse. Typical Processes: Removing Organics – Biological Degradation (anaerobic/aerobic), increased use of MBR or UF polishing Remove Suspended Particles – Clarification and Filtration, increased use of MF and UF membranes Remove Inorganic Dissolved Constituents - Reverse Osmosis, Microfiltration Softening, Demineralization (increasingly, Integrated Membrane Systems (UF+RO+CDI)) Disinfection (pathogen inactivation) – Chlorine, UV, Ozone
Page 25 Siemens Water Technologies What is a Membrane Bioreactor? The substitution of a membrane separation process for activated sludge secondary clarification and tertiary filtration. Membrane Bioreactor
Page 26 Siemens Water Technologies MBR MBR (Membrane Bio Reactor) process uses membranes as an absolute barrier with very small pore size which gives a very clear treated water.
Page 27 Siemens Water Technologies Water Reuse Solutions
Case Study Example No. 4 – Effluent Water Reuse System Prescreen Potable Reuse Water 65 GPM Reject to Drain Chlorination F&B Plant Wastewater Treatment (SBR) Incoming Plant Water Chlorinated Storage To Non-Ingredient Water Uses To Sewer Reverse Osmosis UltraFiltration Carbonated Beverage Facility
Page 29 Siemens Water Technologies Topics for Today’s Presentation I. Overview II. In-Plant Cascading Water Reuse III. Reject Recovery RO’s IV. Treatment of Plant Effluent Water V. Summary VI. Questions
Page 30 Siemens Water Technologies Water Reuse - Summary The economics of water reuse can vary widely depending on your circumstances: Cost of water and sewage in your location Availability of water (limitations on production) Volume of water used in your facility Impact of droughts on your region Public acceptance of water reuse in the Food & Beverage industry is limited. Currently projects are only for non- ingredient applications. Consider all of your water streams when looking for water minimization and water reuse opportunities (see next slide).
Page 31 Siemens Water Technologies Water Reuse Solutions (Industrial – F&B) - Summary Water Sources to be Reused Treatment Reclaimed Water Users Carbon Tower B/W Multi-media B/W Cooling Water Container Rinse Water Warmers / Coolers Line Lube CIP Water Pump Seal Water Rain Water Treated Wastewater Multi-Media Microfiltration Ultrafiltration Reverse Osmosis Membrane Bioreactor Biological Treatment Clarification UV Disinfection Ozonation Cooling Water Toilet Flushing Irrigation Process Water System Cooling Towers Wash Down Truck Washing Warmers / Coolers Boiler Feed Water
Page 32 Siemens Water Technologies Water Reuse - Summary Interest in water reuse is expected to grow dramatically in the near future. Water reuse opportunities can be simple or quite complicated depending on the application. Siemens Industry, Inc. can help you identify your potential water savings and reuse opportunities and apply the appropriate solutions.
Page 34 Siemens Water Technologies Thank You David Bridgers F&B National Account Manager Siemens Industry, Inc. Water Technologies Business Unit Atlanta, GA Phone: 770-921-1837 Mobile: 404-414-8765 E-mail: email@example.com