De Nora has over 50 years of experience removing nutrients, organic compounds, and solids in tertiary fixed-film biological filters. De Nora’s flagship biofilter with over 300 installations is the DE NORA TETRA Denite® system, which biologically reduces phosphorus and converts soluble nitrates to nitrogen gas in an anoxic environment. Existing De Nora media filters can be easily upgraded to biologically active mode as well.
DE NORA TETRA® Biological Filtration
The robust design of DE NORA TETRA filters creates an ideal environment for simultaneous biological and physical/chemical treatment. Common applications include polishing municipal wastewater effluent to reuse standards and/or regulatory discharge limits. Potable and water reuse applications combine De Nora ozone and biological filtration technologies to oxidize micropollutants and to mitigate disinfection byproduct formation.
Easy to Operate and Maintain
Cost Saving
Reliable and Robust
Regulatory Compliance
What is DE NORA TETRA biological filtration?
Wastewater treatment facilities face both increasing regulations and tightening operating budgets. DE NORA TETRA biofilters can be designed in a variety of configurations to achieve optimal treatment for biological oxidation of organic compounds, nitrification , and denitrification.
With DE NORA TETRA Denite biological denitrification systems, nitrogen, phosphorus, and suspended solids are removed in a single process solution. Ideal where space restrictions exist, the fixed-film process requires only one-tenth of the space needed for suspended growth systems, making it easy to expand or retrofit existing tertiary filtration systems.
In addition to anaerobic systems, DE NORA TETRA ColOX™, SAF, and NSAF are aerobic biofilters that are used for BOD/COD oxidation and nitrification.
Why choose DE NORA TETRA biological filtration?
Simplify your plant operations by removing soluble and particulate contaminants in a single step while increasing removal performance in a compact footprint.
Avoid clogging with the rugged SNAP T® Block underdrain, which will not clog or lift in biological applications.
- • System exhibits excellent distribution of backwash air and water, keepings filter media clean and ensuring efficient operation of the filter.
- • With no small openings, nozzles, screens, or moving parts to clog or wear, filters provide a long service life, maximizing your investment.
Enjoy maximum process flexibility and performance with a system that accommodates a wide range of media types and sizes.
- • Prefabricated modular or build-on-site designs are available to suit specific needs.
Want to know more about our DE NORA TETRA® Biological Filtration Solutions?
Applications
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Discover More
- DE NORA TETRA Denite Brochure ( pdf 6 mb )
- DE NORA TETRA Modular DeepBed Filter brochure ( pdf 2 mb )
- Brochure-DE-NORA-TETRA-ABF-650-0316 ( pdf 2 mb )
- DE NORA TETRA DeepBed Filter Brochure ( pdf 2 mb )
- DE NORA TETRA SNAP-T Brochure ( pdf 2 mb )
- ColOX brochure ( pdf 863 kb )
- DE NORA TETRA SAF/NSAF Brochure ( pdf 633 kb )
- DE NORA TETRA SAF/NSAF (EUROPEAN Brochure) ( pdf 3 mb )