Alternatives to Aboveground Effluent

Disposal Mounds

Overview of the NoMound® System Technology

NoMound® Presentation Overview

• Current Status• Basic Concept/Underlying

Principles• Construction Components• NoMound® DN - Denitrification• Questions & Answers• Contact Information

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

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”

Conditions Required for Onsite Treatment

• Adequate Hydraulic Retention Time• Adequate Biomass and Bioactivity• Favorable pH and Temperature

NoMound® Regulatory Justification

Controls & Maintains Minimum Separation Distance Required for Treatment

Modes of Onsite System Failure

• Improper Design/ Siting/ Installation• Physical/ Mechanical• Management/ Maintenance• Hydraulic Performance/ Infiltrability

NoMound® Process Benefits

• Controls Treatment Zone Depth

• Provides Continuous Aerobic Treatment Zone

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

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

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)

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

NoMound® Installation Progress

Existing Effluent Disposal Mound

Typical NoMound® Details LEVEL CONTROLS &

MONITORING WELL

PVC LATERALS

NoMound® Installation Progress

Effluent Disposal System with Perimeter Barrier

NoMound® Installation Progress

Cap Installation Progress

NoMound® Installation Progress

Cap Installation Completion

NoMound® Installation Progress

Final Cover Installation and Grading

NoMound® Installation Progress

Final Grade

Typical NoMound® Level Controls

Typical NoMound® Monitoring Results

Onsite Treatment Processes

• Chemical Processes – Exchange, Adsorption, Precipitation, &

Oxidation/Reduction • Biological Processes

– Predation, Biotransformation, Morbidity, & Nitrification/Denitrification

• Physical Processes– Filtration, Settling, Dispersion/Dilution, &

Volatilization

Typical Effluent Characteristics

• Total Suspended Solids (TSS)• Biodegradable Organics (BOD)• Chemically Degradable Organics (COD)• Surfactants• Bacteria• Viruses• Nutrients (N,P)

Effluent Treatment Process Matrix

Physical Chemical Biological

TSS •BOD •COD •Bacteria • •Viruses • • •Surfactants • • •Nutrients • •

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

Conditions Which Promote Denitrification

• Presence of Consumable Organic Matter• Anoxic Conditions• Nutrient Source for Bacterial Reactions• Low Temperature Variability

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

Before NoMound®

After NoMound®

Contact Information for NoMound®

Paul GruberNoMound OnSite Systems

1038 Frankland RoadTampa, FL 33629

813.251.5856813.253.2997 (fax)www.nomound.com