Sensor for the detection of nitrate and nitrite in water

Veronica Cepak, Eltron Research

     We are developing a small, portable, low-power amperometric nitrate and
nitrite sensor for groundwater and surface water applications.  A
renewable, robust sensor integrated into a microfluidic system can
specifically detect nitrate and nitrite anions without significant
dilution or reduction in the sensitivity of the detected species.  The
sensor is based on an electrochemical method that uses screen-printable
microelectrodes.  Microelectrodes enhance the sensitivity and limit of
detection of the device compared to electrodes of conventional size.
The device also used a simple pump and valve system along with proven
electrochemical instrumentation for detection.  The sensor is applicable
to real time, on-site monitoring of both nitrite and nitrate in water.


Biological System to reduce odor in anaerobic lagoons

Brad Walker, Agskill

            Ag Algae is a biological system to reduce odors in anaerobic lagoons.  A single-celled green algae culture is used to produce oxygen in these system.  Treatment by aeration has proven to be an effective method of reducing lagoon odors by encouraging oxidative metabolism.  The mechanical aeration of lagoons has a high energy requirement.  In addition, aerators can be expensive and require maintenance.  By using photosynthetic oxygenation of Ag Algae, odor reduction is achieved without the high energy requirement.

            Ag Algae systems are currently employed at two swine lagoons at separate facilities located in Southeast Colorado.  AgSkill, Inc. is currently trying to market their system to Concentrated Animal Feeding Operations (CAFO) in Colorado and surrounding states.


Recovery of mercury and heavy metals from dental wastewater

Craig Turchi, ADA Technologies


Electrocoagulation treatment of bilgewater and shipboard wastewater

Craig Turchi, ADA Technologies