Water Reuse Handbook - the Public Building Commission of Chicago

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Water Reuse Handbook Approval Process Currently, greywater systems are not expressly allowed as an alternative to traditional plumbing systems in the Illinois Plumbing Code (the State has jurisdiction over plumbing issues in Chicago). Approval from the State must be sought for greywater systems until such an alternative is legislatively allowed. In addition, the City of Chicago Committee on Standards and Tests must review any systems that are not currently accepted under the Chicago Building Code. The approval process should roughly follow the flowchart on the previous page until regulations are enacted to approve greywater systems. 1 START: Greywater Source 24 : Public Building Commission of Chicago It should be noted that, due to the limited number of greywater systems built to date in the State of Illinois, the permitting process for such systems may be more involved and time-consuming than the process for rainwater harvesting systems. Additional time should be budgeted for City and State project review and minor system redesign. Several sources of water may be appropriate for use in a greywater system, including used water from showers, lavatories, or washing machines. Sources do not include water from the kitchen sink, dishwasher, or blackwater (wastewater from toilets and urinals). Kitchen wastewater and blackwater contain high amounts of organic and inorganic contaminants and bacteria which should be avoided for greywater systems. All greywater sources, especially laundry water, should avoid cleaners that contain harsh chemicals, bleaches, disinfectants, or phosphates. Ammonia-based cleaners should not be used in washing machines contributing to a greywater system that uses chlorine purification, as such cleaners combined with chlorine may form chlorine gas. Hazardous chemicals should never be put down a drain that contributes to a greywater system. In addition, washing machines used as a greywater source should not be used to wash heavily soiled or human waste-soiled items (i.e. dirty diapers). Tools and Strategies: Greywater System Design 1 INITIAL 2 FILTER START GREYWATER SOURCE OVERFLOW TO SEWER 3 FILTER August 2011 4 PURIFICATION SYSTEM DOSIN LOOP
Tools and Strategies: Greywater System Design 2 3 Initial Filter Filter 4 Purification System August 2011 An initial filter serves to remove hair, lint, and other solids from the greywater source to reduce the risk of clogging the system downstream. Cleaning of this filter should occur regularly. See the Rainwater Harvesting System discussion on filters. The majority of information included there is also applicable to greywater systems, with the following clarifications. Ultrafiltration and reverse osmosis filter water to a finer degree than particle filters and may be useful to include in a greywater system, due to various contaminants and particles that source water may contain. These options should be explored during the design of the system. See the Rainwater Harvesting System discussion on UV and chlorination purification techniques. The majority of information included there is also applicable to greywater systems, with the following clarifications. 1 INITIAL 2 FILTER OVERFLOW TO SEWER Chlorine loop (applies only if chlorination START is used for purification 3 GREYWATER of greywater): Due to higher levels FILTER SOURCE of impurities and pollutants in greywater, the system should incorporate a dosing loop to recirculate water in the storage tank through the purification system to maintain the desired chlorine level. As an alternative, an automatic chlorine analyzer can continuously monitor chlorine levels and provide more chlorine via a chemical injection pump if necessary. The system should incorporate a fail-safe feature that automatically reverts the system to municipal make-up water if chlorine levels fall below the acceptable level. 1 INITIAL 2 FILTER START GREYWATER SOURCE 1 INITIAL 2 FILTER START GREYWATER SOURCE DOSING LOOP Water Reuse Handbook VENTILATION OVERFLOW TO SEWER 3 FILTER OVERFLOW TO SEWER 3 FILTER MUNICIPAL MAKE-UP WATER AIR GAP Public Building Commission of Chicago : 25 4 PURIFICATIO SYSTEM 4 PURIFICATIO SYSTEM 4 5 6 PURIFICATION SYSTEM STORAGE TANK OVERFLOW DRAIN BOOSTER PUMP
Page 1 and 2: AUGUST 2011 Public Building Commiss
Page 3 and 4: Contents Introduction .............
Page 5 and 6: Letter from the Chairman As Chairma
Page 7 and 8: Letter from the Executive Director
Page 9 and 10: Introduction The Public Building Co
Page 11 and 12: Reduced Demand for Potable Water Re
Page 13 and 14: Water Regulations Introduction Exis
Page 15 and 16: Recent Regulatory Developments Augu
Page 17 and 18: Tools and Strategies: Reducing Fres
Page 19 and 20: Tools and Strategies: Reducing Fres
Page 21 and 22: August 2011 VENTILATION 8 FINISH In
Page 23 and 24: Tools and Strategies: Rainwater Har
Page 31: August 2011 VENTILATION 7 REQUIRED
Page 35 and 36: Tools and Strategies: Greywater Sys
Page 37 and 38: Tools and Strategies: Blackwater Sy
Page 39 and 40: August 2011 Public Building Commiss
Page 41 and 42: Planning for a Water Reuse System:
Page 43 and 44: Planning for a Water Reuse System:
Page 45 and 46: Building Operations and Maintenance
Page 47 and 48: Building Operations and Maintenance
Page 49 and 50: Local Case Studies: Beach Houses Be
Page 51 and 52: Local Case Studies: Beach Houses Au
Page 53 and 54: Local Case Studies: Valley Forge Fi
Page 55 and 56: Local Case Studies: Yannell Residen
Page 57 and 58: Local Case Studies: Center on Halst
Page 59 and 60: Local Case Studies: Center on Halst
Page 61 and 62: National/International Examples: St
Page 63 and 64: National/International Examples: Po
Page 65 and 66: National/International Examples: To
Page 67 and 68: National/International Examples: Ha
Page 69 and 70: National/International Examples: Sy
Page 75 and 76: Bibliography “Greywater Reuse in
Page 77 and 78: Bibliography “The Lifesaver Bottl
Page 79 and 80: Definitions Definitions August 2011
Page 81 and 82: August 2011 Water Reuse Handbook Pu
Page 83 and 84:
August 2011 Water Reuse Handbook Pu
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Water Reuse Handbook - the Public Building Commission of Chicago

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