Transcript Alternatives to Aboveground Effluent Disposal Mounds

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
2.3 ft3
water
@ 62.4
lbs/ft3
equals
144
lbs/F2
1 psi
1 psi air
over 144
square
inches
equals
144 lbs/F2
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
TSS
BOD
COD
Bacteria
Viruses
Surfactants
Nutrients
Physical
•
Chemical
Biological
•
•
•
•
•
•
•
•
•
•
•
•
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 Gruber
NoMound OnSite Systems
1038 Frankland Road
Tampa, FL 33629
813.251.5856
813.253.2997 (fax)
www.nomound.com