IF ITS NOT A HOUSE, ITS HIGH STRENGTH Ron Suchecki Hoot Systems, LLC Lake Charles, LA

AWWARF Domestic Water Use

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

Progress In Water Savings Pre 1985 – Toilets were GPF Standard was 3.5 GPF 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)

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

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

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

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

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

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

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

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

CIDWT Resources

Exit to CIDWT Form

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

Any Questions