DE NORA TETRA^® ABF Active Biological Filter with ozone

Why Choose DE NORA TETRA ABF Systems?

Reduced ozone equipment cost: Combining ozone with a biological filter reduces the required ozone generation capacity, which means a smaller, less costly ozone generation system.

Reduced energy consumption: Because smaller ozone systems are needed, it means that you need less power to run your requirement.

Process does not require upstream RO or UF membranes: For indirect and direct potable reuse, the DE NORA TETRA ABF filter does not require expensive to own and operate membrane technology to achieve water reuse standards.

Disinfection Byproduct Reduction: The BAF biologically oxidizes commonly produced disinfection byproducts associated with ozone usage such as bromate, aldehydes and NDMA. It also provides a biologically stable effluent by oxidizing Assimilable Organic Carbon (AOC’s) generated by ozonation. Biologically stable effluent lowers the risk of undesirable downstream biofilm growth in the filter.

Indirect/direct Water Reuse: DE NORA TETRA ABF process versus conventional membrane-based process such as the Full Advanced Treatment (FAT) using Microfiltration/Ultrafiltration + Reverse Osmosis + Advanced Oxidation Process.

DE NORA TETRA ABF Active Biological Succes Story: A municipality in North America

The DE NORA TETRA ABF bioactive filter using the Ozone BAF Process was installed in a municipality in North America, and achieved outstanding results:

• O3-BAF effluent avg 47% > TTHM removal than current plant performance - exceeds pilot objective of > 25% 
• Pilot control anthracite had 2.2 times higher effluent TTHM than O3-BAF 

How does the DE NORA TETRA® ABF work?

The DE NORA TETRA ABF bioactive filter employs a Ozone BAF Process which typically refers to a water treatment process that combines Biological Active Filtration (BAF) with ozone treatment. Let's break down what these components mean:

• Biological Active Filtration (BAF): BAF is a biological water treatment process that combines biological treatment (typically using microorganisms like bacteria) with physical filtration. In a BAF system, wastewater is passed through a filter media (such as sand, gravel, or plastic materials) that supports the growth of beneficial microorganisms. These microorganisms break down organic matter and remove pollutants from the water as it passes through the filter bed. BAF is known for its ability to efficiently treat water and remove contaminants. 
• Ozone Treatment: Ozone (O3) is a powerful oxidizing agent and disinfectant. It is used in water treatment to break down organic and inorganic pollutants, disinfect the water, and remove color and odor. Ozone treatment is often used to target compounds that are challenging to degrade through biological processes alone, such as certain pharmaceuticals and industrial chemicals. 

When combined, the Ozone BAF process typically involves the following steps:

1. Water is initially subjected to ozone treatment, where ozone gas is introduced to oxidize and break down pollutants in the water. 

2. After ozone treatment, the water is then directed to a Biological Active Filtration system. Here, the remaining ozone and any byproducts of the ozone treatment are removed or allowed to naturally dissipate. 

3. In the BAF system, the biological treatment continues, with microorganisms on the filter media further breaking down any remaining organic matter and contaminants. 

By combining ozone treatment with BAF, this process can effectively treat a wide range of pollutants in water. The ozone step is particularly useful for the oxidation of difficult-to-treat compounds, while BAF provides efficient biological treatment and filtration. This combined approach can be beneficial for the treatment of industrial and municipal drinking water to meet stringent water quality standards.

*De Nora manufactures devices for the in-situ production of disinfectants. Disinfectants can only be manufactured, placed on the market and used in the European Union exclusively on the basis of an authorization issued under Regulation 528/2012 and/or under the national legislation in force in each Member State. Contact De Nora to receive more information on regulatory compliance status of the specific equipment in your region.