Post-Treatment Aeration Demonstrations

BlueInGreen, LLC demonstrated the Supersaturated Dissolved Oxygen Injector (SDOXTM) technology in two post-

treatment aeration applications. The SDOXTM was installed and operated at two regional wastewater treatment

facilities: the City of Fayetteville Paul R. Noland Wastewater Treatment Facility and the Rogers Pollution Control

Facility. In both demonstrations, the SDOXTM was directly compared to existing post-treatment aeration systems.

City of Fayetteville Wa st ewater Treatment Facility Demonstration 



The

portable

SDOXTM

system

pictured

was

demonstrated  for  CH2M

HILL OMI at the City of

Fayetteville

Wastewater

Treatment  Facility.  The

SDOXTM  oxygenated  the

post-treatment

effluent

continuously over six days.

The demonstration indicated implementing an SDOXTM would result in an 80% cost savings per year.

This

demonstration convinced OMI and the City of Fayetteville to purchase the SDOXTM.

Table 1: Side-by-side Comparison of the SDOXTM with the Existing Fayetteville Post-Treatment Aeration System.

Cost Efficiency*

DO Increase

Oxygen Consumed

Power Consumed

(mg / L)

(lb O2/ day)

(HP)

($ / lb DO)

3.9

4040

30

$ 0.81

Existing System

SDOXTM

3.2

505

13.6

$ 0.15

*Based on 2007 electricity and oxygen costs.

Existing Post-Treatment Aeration System Setup and Performance:

 Two surface agitators  /aerators provide most post-treatment aeration. A supplemental oxygen feed system

provides additional oxygenation.

 The existing post-treatment aeration system increases the effluent dissolved oxygen (DO) concentration by

an average of 3.9 mg/L.

 The surface agitators  /aerators draw 30 HP, and the supplemental oxygen feed system uses 4040 lb O2 per day.