In Depth

Aero-Tech AT-600 aerobic treatment unit

When choosing a secondary treatment device, do yourself and your client a favor and compare Aero-Tech aerobic treatment units with other types of secondary treatment devices in the four following categories.    If you do the research, you will agree that Aero-Tech is superior.

Treatment levels:
Aero-Tech does a superior job lowering CBOD, TSS and even total Nitrogen.  NSF testing results show that average effluent (leaving the ATU) is 5mg/L CBOD,   6mg/L TSS with dissolved oxygen at 4mg/L.   That is a BOD reduction of 98-99%.  Furthermore, these averages include the NSF start-up period and days where BOD was exceptionally high (400 mg/L BOD).  Aero-Tech was allowed to throw out the testing data when BOD influent was as high as 400 mg/L but but instead chose to kept that data to make a point about their unit’s superior ability to treat wastewater.    On most days (according to NSF results) Aero-Tech’s CBOD effluent was 2mg/L.

Be sure to review NSF 40 reports when evaluating secondary treatment devices.  When comparing BOD and TSS reduction, look at the percent reduction of BOD and TSS.  This is the best way to compare units since influent levels differ during NSF testing .   Aero-Tech’s influent average was 220 mg/L BOD.  Some other brands only had influent of 120 mg/L.  This is why comparing percent reduction in BOD is a good way to compare treatment units.

While many manufacturers won’t let you review their full reports, Aero-Tech makes it’s  NSF testing report is available on-line (it may take a minute for the page to load).

Aero-Tech units allow you to reduce the size of your absorption field in Indiana by 33% in heavy soils (<.5 loading rate) and by 50% in heavy soils (>=.5 loading rates).   in Indiana through ISDH).  Field system reductions are sometimes referred to as “soil credits”.

The AT-1500 (up to 1500 gallons per day) can be equipped with a 230 volt aerator to quickly and efficiently treat high strength waste from  restaurants, wineries, food service businesses and other types of facilities with high BOD.  Multiple AT-1500 units can be set in parallel to handle unlimited flows.

Maintenance on Aero-Tech ATUs is minimal.  There are no compressors to wear out and no diffusers or media to plug.  NSF requires that the certified excavator who installs the system provides two years of routine service on the unit.  The included control panel has a current sensor that  sets off the alarm if the aeration pump stops running.   Routine service includes the following (as detailed in the ATU’s manual).
Clear the scum in the carifier compartment       6 months to 2 years
Clear air vents on the control pedestal    (if applicable)  6 months to 2 years
Repair or replace the submersible aerator           (if applicable)  5 to 10 years
Pump sludge from aeration tank                         (as necessary) 2 to 5 years
Pump sludge from pretreatment/septic tank           (as necessary)   2 to 4 years

Aero-Tech’s five year warranty is the best of any NSF 40 certified device.   If your aerator goes bad after four years, you will get a new aerator with a new five year warranty.  The warranty includes parts but not installation.

Quality of Construction:
All Aero-Tech tanks are helically spun with 40 strands of  fiberglass string.  The end product is a super strong tank that is composed of 75% fiberglass and 25% resin.  All Aero-Tech tanks are completely water tight and can be fitted with an optional anti-flotation ring.  The aeration pumps are well built, giving  Aero-Tech the confidence to warranty them for five years.

AutoCAD files (and PDF files) are available for all Aero-Tech tanks.  This makes your design work easy and efficient.  Contact Me for more information.

Aero-Tech has simplified its paperwork by producing one single manual that includes all of the following:

  • System Introduction
  • Process Description
  • Operating Instructions (for homeowners)
  • Initial Service Policy Description
  • Unit Dimensions and Part Names
  • Routine Service Description
  • Tank and Control Panel Installation Instructions
  • Start Up Procedures
  • Inspection and Service Procedures
  • Warranty Information

Contact me to find out more.