The Electrolytic Organic Destruction (EOD) Process
EOD is a new technology for treating organic contaminants in waste or process water developed by De Nora Tech, a
leader in electrochemistry for over 36 years.
Often organic bearing waste water is treated using biological systems (activated sludge or trickling filters). In some cases,
due the nature of the organics, for example toxicity or the time required for the biological system to breakdown the
organic, biological systems may not be effective or economical. In these cases, the waste water may be concentrated and
hauled away, or activated carbon might be used to adsorb the organic. In both cases, the cost to haul away and dispose
of the concentrate or contaminated carbon can be expensive. (For more information on the economics of EOD click here.)
The EOD process involves oxidizing organic compounds in an electrochemical cell both directly at the surface of a
catalytic electrode and indirectly by oxidizing chemicals in solution. The technology employs electricity as the main
reactant and the addition of other chemicals is not required unless the solution conductivity is extremely low. In some
cases the organic compounds can be converted to carbon dioxide and in many other cases to compounds that are more
easily treated by biological processes. Care must be taken in treating streams with high chloride content. This can result
in chlorine generation at the anode and the possibility of producing chlorinated organics. .
The figure below shows the basic EOD process. Water containing an organic contaminant is circulated from a batch tank,
through an electrolyzer and back to the batch tank. The electrolyzer contains anodes and cathodes and current is
passed through the anode and cathode pairs. Organic compounds are oxidized at the surface of the anode or in solution
by oxidizing compounds produced at the anode. The anode is typically a high surface area electrode with an electro
catalytic coating. The high surface improves mass transfer of the organic to the surface of the anode or the contact
between the oxidizing compound and the organic. The electro catalytic coating on the anode can improve the selectivity
of the reaction. The cathode provides the counter reaction and completes the circuit. In most cases the reaction at the
cathode is the production of hydrogen gas.
A more detailed discussion of the reactions within the electrochemical cell can be found by following the following link:
EOD Reaction Details.
Hydrogen is explosive or flammable in air or oxygen over a broad concentration range. To avoid the explosive/flammable
dangers of hydrogen, it is typically diluted to below 2 volume % hydrogen using an air blower. The lower explosive limit
(LEL) of hydrogen in air is 4 volume %.
EOD is a new technology for treating organic contaminants in waste or process water developed by De Nora Tech, a
leader in electrochemistry for over 36 years.
Often organic bearing waste water is treated using biological systems (activated sludge or trickling filters). In some cases,
due the nature of the organics, for example toxicity or the time required for the biological system to breakdown the
organic, biological systems may not be effective or economical. In these cases, the waste water may be concentrated and
hauled away, or activated carbon might be used to adsorb the organic. In both cases, the cost to haul away and dispose
of the concentrate or contaminated carbon can be expensive. (For more information on the economics of EOD click here.)
The EOD process involves oxidizing organic compounds in an electrochemical cell both directly at the surface of a
catalytic electrode and indirectly by oxidizing chemicals in solution. The technology employs electricity as the main
reactant and the addition of other chemicals is not required unless the solution conductivity is extremely low. In some
cases the organic compounds can be converted to carbon dioxide and in many other cases to compounds that are more
easily treated by biological processes. Care must be taken in treating streams with high chloride content. This can result
in chlorine generation at the anode and the possibility of producing chlorinated organics. .
The figure below shows the basic EOD process. Water containing an organic contaminant is circulated from a batch tank,
through an electrolyzer and back to the batch tank. The electrolyzer contains anodes and cathodes and current is
passed through the anode and cathode pairs. Organic compounds are oxidized at the surface of the anode or in solution
by oxidizing compounds produced at the anode. The anode is typically a high surface area electrode with an electro
catalytic coating. The high surface improves mass transfer of the organic to the surface of the anode or the contact
between the oxidizing compound and the organic. The electro catalytic coating on the anode can improve the selectivity
of the reaction. The cathode provides the counter reaction and completes the circuit. In most cases the reaction at the
cathode is the production of hydrogen gas.
A more detailed discussion of the reactions within the electrochemical cell can be found by following the following link:
EOD Reaction Details.
Hydrogen is explosive or flammable in air or oxygen over a broad concentration range. To avoid the explosive/flammable
dangers of hydrogen, it is typically diluted to below 2 volume % hydrogen using an air blower. The lower explosive limit
(LEL) of hydrogen in air is 4 volume %.
Spartan Environmental Technologies
Air and Water Treatment
Air and Water Treatment
 |
| |
 |
| |
 |
| |
 |
| |
 |
| |
 |
| |
 |
| |
 |
Spartan Environmental
Technologies, L.L.C.
7383 Lauren J Dr
Mentor, OH 44060
USA
Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com
Technologies, L.L.C.
7383 Lauren J Dr
Mentor, OH 44060
USA
Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com