White Paper | October 2, 2013

Mounting Evidence Of Denitrification System's Efficacy In Cold Weather

Source: De Nora Technologies

For more than three decades, wastewater treatment plants have faced increasingly stringent regulations regarding total maximum loads for nutrient discharges. During that period, deep bed denitrification filters have proven to be an effective treatment technology used by wastewater plants to meet low total nitrogen (TN) limits. But cold water temperatures in more northern locales have proven to be a challenge to the effectiveness of the denitrification process. Recent wastewater treatment plant operating results, however, have shown that deep bed down flow filters are as reliable as tertiary treatment to remove suspended solids and achieve lower effluent nitrogen levels in cold weather conditions.

The combination of denitrification and solids removal in a deep bed filter process was first patented in 1979, and since then the technology has been responsible for helping improve wastewater quality at treatment plants across the country. When full nitrogen removal is required, one of the available treatment methods is biological denitrification. Nitrate-nitrogen (NO3-N) is biologically converted into nitrogen gas, thus playing an integral role in maintaining the integrity of the wastewater treatment plant's receiving waters.

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