Thursday, July 9, 2009

Waste Water Processing: Electrocoagulation

Electro coagulation is an exciting new technology and here at SES we can evaluate your waste stream for electrocoagulation. Just give us a call at 210-633-0051

The broad-spectrum treatment effect of electrogoactulation allows one system to remove multiple contaminates with the same price, space, and time as it would to remove one contaminate. Here are some capabilities of electrocoagulation: it removes heavy metals, suspended and colloidal solids, fats oil and grease; it breaks oil emulsions in water; destroys and removes bacteria, viruses, and complex organics. With all of these capabilities the benefits are numerous including: reducing your sludge volume, no usage of chemicals, able to process multiple contaminants, harvests proteins, oils, and metals, and is able to process waste streams with up to 5% solids.
Below is how the process is actually performed:
1. Equilibration is done in a similar manner as with conventional systems. Following equilibration the wastewater is pumped through a reaction chamber. This technology is very useful in removing a variety of wastewater contaminants. This technology has been used successfully in removing metals, oil and grease, and fecal solids.
2. Electro coagulation - is done in a reaction chamber which consists of a chamber with several sacrificial charged steel plates inside. Positive and negative charges are applied to alternate plates, one being negative and the other positive. As water passes over the plates through the reaction chamber or cell, an electron soup is formed which includes metal ions from the steel plates mixed with ionic species present in the water, these highly charged species form bonding sites for the contaminants in the water, and just as in the conventional treatment process they form little particulates. From this point forward the process is basically the same as conventional treatment. The advantage is that usually there is no chemical usage required with the possible exception of ph adjustment to enhance the process. A rectifier is used to provide the power to charge the plates. This process is very efficient and results in a very low cost process for treatment of your wastewater.
3. De foam/clarification - coming out of the reaction chamber is clear water and the particulates which are lifted out of the water by the formation of gas during the process. These float to the top initially, they will eventually fall to the bottom and this leaves a clear water product which can be decanted to the discharge point. Defoaming / clarification may be accomplished in an inclined plane clarifier or a regular poly tank.
4. Decant/filtration - following the process of defoaming and clarification the water should be sent through a polishing filter. This may be done using a variety of filtration products. SES can help you put your entire system together.

Investing in new technologies can really pay off for your company; give us a call to talk about how we can help you implement this new technology. (210)633-0051

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