guelph residential greywater field test final report - City of Guelph

More documents

Recommendations

Info

equates to a GHG emission of approximately 8 kg of CO2e per year 4 . The energy demand associate with supplying 24 m 3 per year of water for toilet flushing via Guelph’s municipal system would be somewhat less at approximately 18 kWh per home per year, a demand that equates to a GHG emission of only about 5 kg of CO2e per year. 4 Based on Ontario coefficient of 0.27 a kg CO2/kWh as identified in Greenhouse Gas and Energy Co-Benefits of Water Conservation, March 2009, Carol Maas City of Guelph Residential Greywater Field Test 24 Final Report
4.0 Water Quality Monitoring 4.1 Approach As part of Water Quality Monitoring for the Field Test, the City of Guelph sampled greywater at 20 participant households on a monthly basis for a one-year period. Dip samples of treated greywater were collected from toilets within each home with City staff completing onsite testing for Turbidity and Chlorine Residuals. Beyond onsite sampling and analysis, samples for parameters including biochemical oxygen demand (BOD), chemical oxygen demand (COD), and Escherichia coli (E.coli) were collected by City staff at each home and submitted to Maxxam Analytics Laboratory in Mississauga for testing. In addition, researchers at the University of Guelph School of Engineering conducted sampling at the 5 remaining homes on a bi-weekly basis. As part of this sampling program, water quality samples were taken of both the shower water entering the greywater reuse system (influent) as well as grey water being supplied to the toilets (effluent). Participants were instructed to collect shower water by plugging their tub and taking a sample of the water following their shower. The raw and treated greywater samples were picked up in the morning for laboratory analysis at the University. Throughout the study duplicate samples were taken by researchers for testing at both Maxxam Analytics and the University to ensure consistency in results attained. The Health Canada guidelines specify that at least 5 greywater samples should be taken from a system each month to accurately determine the median values, however, neither the City or the University collected samples at this frequently due to challenges in attaining access to private residents under this frequency and financial limitations associated with satisfying this sampling regime. However, to support program participants throughout the duration of the study, homeowners were given the opportunity to request the completion of additional water quality samples at their home should issues or other challenges be experienced with their system. City of Guelph Residential Greywater Field Test 25 Final Report
Page 1 and 2: Guelph Residential Greywater Field
Page 3 and 4: Table of Contents List of Tables ..
Page 5 and 6: Table 16: Precedents Risk Associate
Page 7 and 8: asis) has been limited by municipal
Page 9 and 10: Guelph Residential Greywater Reuse
Page 11 and 12: 2.0 State of Home Greywater Systems
Page 13 and 14: Trunk Sewer and Paisley-Clythe Feed
Page 15 and 16: component of the ConservePump syste
Page 17 and 18: Canadian Standards Association The
Page 19 and 20: Figure 2: Water End Use Summary for
Page 21 and 22: Table 4: Average Water Savings Site
Page 23: 3.5 System Energy Usage To measure
Page 27 and 28: highest quality of raw greywater pr
Page 29 and 30: Regardless of whether a toilet is s
Page 31 and 32: 5.0 Social Feedback Monitoring & Ac
Page 33 and 34: technologies in advance of their pa
Page 35 and 36: Communication Improvements There ar
Page 37 and 38: • Scenario 1: Payback on Investme
Page 39 and 40: zone isolation in the home (such as
Page 41 and 42: esource use (treatment chemical use
Page 43 and 44: 8.0 Municipal Management Framework
Page 45 and 46: • Ongoing System Sampling and Per
Page 47 and 48: Table 12: Risk Associated with Educ
Page 49 and 50: Table 15: Risk Associated with Not
Page 51 and 52: defined to increase educational req
Page 53 and 54: planning horizon of this strategy.
Page 55 and 56: Field Test Observations Key finding
Page 57 and 58: water/wastewater demands. In learni
Page 59 and 60: quality. Additionally appropriate t
Page 61 and 62: CSA. (2011). CSA B64.10: Selection
Page 63 and 64: ISO. (2009). ISO 31000: Risk Manage
Page 65 and 66: RWTF. (2003). Recycled Water Task F

guelph residential greywater field test final report - City of Guelph

Create successful ePaper yourself

Delete template?

Save as template?