1. OutlineBackground Conventional on-site systems Advanced treatment systems

2. Water Quality Problems on a National Scale 10-30% of systems failing annually 10-30% of systems failing annually Over 50% of systems >30 yrs. old Over 50% of systems >30 yrs. old Not meeting Clean Water Act goals Not meeting Clean Water Act goals

3. Wastewater treatment systems have an impact on our marine resources. n All wastewater treatment systems produce a discharge. n The better the system – the cleaner the discharge. n Dirty discharges hurt nearby marine or water resources. The EPA admits that the CT River was at one time called “America’s best landscaped sewer.”

4. Conventional Septic System Consists of a Minimum 1000 Gallon Septic Tank, With Two Compartments and an Effluent Filter Discharging to an Approved Leaching System

5. CONVENTIONAL SEPTIC TANK

6. Effluent Filter Installed in the Outlet Baffle

7. The Septic System The Proper Setting Ground Water Basement Septic Tank Leaching Trenches Septic System Effluent 18” Minimum Vertical Separation Distance Required

8. What is an Advanced Treatment System? n These are on-site wastewater systems that have features beyond typical septic systems, which can provide a higher degree of treatment than conventional septic systems n Still uncommon in Connecticut. (Requires a management plan.) n All of these systems use biological processes to provide treatment.

9. What is an Advanced Treatment System? (Continued) n The basic biological treatment concepts (e.g. trickling filters, activated sludge systems, etc.) have been in use for many years in larger scale settings. n They are now packaged to scale down applications to serve individual homes and clusters. n Systems take advantage of newer materials of construction and more powerful controllers. n Advanced Treatment Systems Use Air Blowers or Pumps to Recirculate Fluids. Some Systems Have Multiple Control Units.

10. VARIOUS COMPONENTS FILTER RISER TRICKLING FILTER AIR COMPRESSOR

13. An Advanced Technology System Could be as Simple as a Recirculating Trickling Filter, or a Recirculating Sand Filter Sand Filters May be Recirculated to the Septic Tank or Installed as Part of the Leaching System in the Single Pass Mode.

14. RECIRCULATING MODE

15. BOTTOMLESS LEACHING

16. COMMUNITY SYSTEMS