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IF IT’S NOT A HOUSE, IT’S HIGH STRENGTH

IF IT’S NOT A HOUSE, IT’S HIGH STRENGTH. Ron Suchecki Hoot Systems, LLC Lake Charles, LA. Domestic Water Use. AWWARF - 1999. Typical Domestic Sewage. 200mg/L BOD/TSS (100-300) 40-70mg/L Total Nitrogen 1999 study, 75% of water use is NOT Toilet use. Progress In Water Savings.

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IF IT’S NOT A HOUSE, IT’S HIGH STRENGTH

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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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