alternatives to aboveground effluent disposal mounds overview of the nomound ® system technology
TRANSCRIPT
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Alternatives to Aboveground Effluent
Disposal Mounds
Overview of the NoMound® System Technology
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NoMound® Presentation Overview
• Current Status• Basic Concept/Underlying
Principles• Construction Components• NoMound® DN - Denitrification• Questions & Answers• Contact Information
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NoMound® Applicability
• Newly Patented Technology• Used for Effluent Disposal at High Water
Table Sites• Eliminates Effluent Disposal Mound or
Requirement for Site Elevation/Fill• Additional Applications Under
Development– NoMound® DN - Denitrification– NoMound® SW - Stormwater
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NoMound® Status
• US Patents Issued October 1998• Florida Innovative System Approval
December 1998• First Installation in Sanford, FL, February
1999• All Florida Innovative System Installations
Completed• January 2001, Florida Permit System Status
Changed to “Engineered Systems”
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Conditions Required for Onsite Treatment
• Adequate Hydraulic Retention Time• Adequate Biomass and Bioactivity• Favorable pH and Temperature
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NoMound® Regulatory Justification
Controls & Maintains Minimum Separation Distance Required for Treatment
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Modes of Onsite System Failure
• Improper Design/ Siting/ Installation• Physical/ Mechanical• Management/ Maintenance• Hydraulic Performance/ Infiltrability
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NoMound® Process Benefits
• Controls Treatment Zone Depth
• Provides Continuous Aerobic Treatment Zone
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NoMound® Provides Installation Flexibility
• For Septic Tank or ATU Effluent Disposal • Can Use Existing Soils• Dense Clay and Bedrock Limit Its Use• Installed after Construction of Conventional
System• Works With Any Pressurized Distribution
System• Can be Used at Residential and Commercial
Sites• Commercial Sites With High BOD Require
Effluent Pretreatment
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NoMound® Basic Principle
1 psi air over 144
square inches
equals
144 lbs/F2
2.3 ft3 water@ 62.4 lbs/ft3
equals
144 lbs/F2
1 psi
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NoMound® System Components
• Conventional Septic Tank, Drainfield & Effluent Pump
• Perimeter Barrier and Cap• In-situ Monitoring and Level Controls • Control and Alarm System• Air Supply Pump (17-watts)
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NoMound® Installation, Monitoring, & Maintenance
• Installers must be NoMound® Approved• System must meet Florida D.O.H.
Requirements• D.O.H. Inspection is Standard• Maintenance same as Conventional
System
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NoMound® Installation Progress
Existing Effluent Disposal Mound
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Typical NoMound® Details LEVEL CONTROLS &
MONITORING WELL
PVC LATERALS
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NoMound® Installation Progress
Effluent Disposal System with Perimeter Barrier
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NoMound® Installation Progress
Cap Installation Progress
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NoMound® Installation Progress
Cap Installation Completion
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NoMound® Installation Progress
Final Cover Installation and Grading
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NoMound® Installation Progress
Final Grade
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Typical NoMound® Level Controls
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Typical NoMound® Monitoring Results
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Onsite Treatment Processes
• Chemical Processes – Exchange, Adsorption, Precipitation, &
Oxidation/Reduction • Biological Processes
– Predation, Biotransformation, Morbidity, & Nitrification/Denitrification
• Physical Processes– Filtration, Settling, Dispersion/Dilution, &
Volatilization
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Typical Effluent Characteristics
• Total Suspended Solids (TSS)• Biodegradable Organics (BOD)• Chemically Degradable Organics (COD)• Surfactants• Bacteria• Viruses• Nutrients (N,P)
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Effluent Treatment Process Matrix
Physical Chemical Biological
TSS •BOD •COD •Bacteria • •Viruses • • •Surfactants • • •Nutrients • •
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Nitrification/ Denitrification
• Oxidation Reactions– Ammonification Converts Organic
Nitrogen to NH4
– Nitrification Converts NH4 to NO3-N
• Reduction Reactions
– Denitrification Converts NO3-N to Nitrogen Gas
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Conditions Which Promote Denitrification
• Presence of Consumable Organic Matter• Anoxic Conditions• Nutrient Source for Bacterial Reactions• Low Temperature Variability
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NoMound® DN - Concept Design
• Presence of Organic Nitrogen Present from Secondary or Advanced Treatment Unit
• Organic Carbon Source Available • Reducing Environment - Anoxic
Conditions• Nitrogen Gas Generated by
Denitrification Used to Control Water Table
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Before NoMound®
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After NoMound®
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Contact Information for NoMound®
Paul GruberNoMound OnSite Systems
1038 Frankland RoadTampa, FL 33629
813.251.5856813.253.2997 (fax)www.nomound.com