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On-Site Wastewater Conditioning System for Phosphorus Removal An Interim Report NALMS 11-13-14 Chris Mikolajczyk, CLM, Princeton Hydro, LLC Paul Sutphen,

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Presentation on theme: "On-Site Wastewater Conditioning System for Phosphorus Removal An Interim Report NALMS 11-13-14 Chris Mikolajczyk, CLM, Princeton Hydro, LLC Paul Sutphen,"— Presentation transcript:

1 On-Site Wastewater Conditioning System for Phosphorus Removal An Interim Report NALMS Chris Mikolajczyk, CLM, Princeton Hydro, LLC Paul Sutphen, BS, MS, Clear Lake Technology, LLC

2 Lake Impairment July 1950 – lake clarity 12 feet vs 4 feet July 2014 Culver Lake is a eutrophic water body and is P limited Phosphorus loading from septic represents a significant source of nutrient loading from the watershed

3 Design Objectives of Waste Water Conditioning System Contain phosphorus and other contaminants within septic tank Adaptable to all tank and field on-site systems No ground disturbance or alteration required to existing system Simple, reliable, and relatively low cost Condition wastewater in proportion to household phosphorus regardless of numbers in household

4 Septic Tank Effluent Sampling Results Before dosing with alum pH Cond TP = 9.8 –11, avg mg./l PO4(P) = , avg. 7.8 mg./l TSS = , avg. 66 mg./l E. Coliform = 2.49 million/100ml. Avg. H2O consumption 70 gpd (2 member household) Phosphorus/person= 1.17 gr./day (30% org./70% inorganic.) After dosing with alum pH Cond, TP 3.9 mg./l ( 63% red.) PO4(P) 0.6 mg./l (92% red.) TSS = 18-62, avg. 38 mg./l (42% red.) E. Coliform = 23 thousand/100ml. (99% red.) Alum dose range mg./l. Alum use approx. 4 gal./yr./person Alum cost approx. $22/yr./person

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6 Summary of Findings and Next Steps Developed a system for conditioning waste water A 1000 gallon Septic tank functions well as a clarifier Significant removal of phosphorus, coliform and TSS 30 gal. tank of liquid alum would last > 2 years/2 persons Next Steps Continue to monitor sludge accumulation to determine optimum septic tank pumping frequency Continue testing of a black/grey water two tank system More information at clearlaketechnology.com

7 End of Presentation Questions?


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