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Efficient Water Use in Residential and Commercial Buildings

Learn about water-saving strategies in buildings, including trends in toilet and faucet efficiency, sewage strength, and practical methods for determining flow and strength. Discover how new fixtures and redesign approaches can reduce water consumption and sewage disposal. Explore effective ways to estimate flow and strength based on existing data and property characteristics. Find solutions for conserving water in both residential and commercial structures in this informative guide.

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Efficient Water Use in Residential and Commercial Buildings

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  1. IF IT’S NOT A HOUSE, IT’S HIGH STRENGTH Ron Suchecki Hoot Systems, LLC Lake Charles, LA

  2. Domestic Water Use AWWARF - 1999

  3. Typical Domestic Sewage • 200mg/L BOD/TSS (100-300) • 40-70mg/L Total Nitrogen • 1999 study, 75% of water use is NOT Toilet use

  4. Progress In Water Savings • Pre 1985 – Toilets were 5.0-7.0 GPF • 1985-1991 Standard was 3.5 GPF • 1991-1996 Standards were 3.5 to 1.6 GPF • 1996-Present Standard is 1.6 • Today there are new models that Range from single flush of 1.28 Gallons, and Dual Flush of less than a gallon & 0.5 GPF (#1)

  5. Other Water Savings • Washing Machines • Past • 30-40 Gallons per load • Current – • HE Top Load - 23 Gallons • HE Front load - 15 Gallons • Lavatory Faucets • Shower Heads

  6. What Does This Mean ? • Sewage Strength • Water Consumption • These Same Factors apply outside the home as well.

  7. Commercial Structures • Bathing 19 % • No Laundry 22% • Leaks 14% • Not from bathrooms 55% • Bathroom Now - (Toilets/Sinks) may account for up to 100% of use • Type of Building may increase strength • Food Prep • Food Waste • Self Serve

  8. Ultra Flow Fixtures • Water Conservation High Profile • Remodeling at Higher Rate than Residential • Waterless Urinals

  9. How to Determine Flow & Strength • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best

  10. How to Determine Flow & Strength • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best

  11. Onsite Estimation Tables • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best 2. Estimation from Like Properties • Size • Location • Community all become major factors

  12. Onsite Estimation Tables • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best 2. Estimation from Like Properties • Size • Location • Community all become major factors 3. State Tables or National Tables or Calculators

  13. CIDWT Resources

  14. Exit to CIDWT Form

  15. BOD Loading Soda • Soda – 75,000 mg/L BOD • 75,000 BOD @32 oz. = • Diluted into 2,000 gallons – 9.5 mg/L BOD • Diluted into 500 gallons – 38 mg/L BOD

  16. Any Questions

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