Leopold elimi-NITE® 2.0 denitrification system is an effective method of reducing nitrate nitrogen in the effluent stream of a wastewater treatment plant by converting nitrate nitrogen to nitrogen gas. The biological conversion is done in an attached growth, downflow, deep bed, mono-media filter. Dissolved oxygen is removed to create an anoxic environment for denitrification, and particulate matter is removed so insoluble phosphorous is removed, as well. The system adds supplemental carbon source or microbiological food needed to metabolize the nitrogen.
The elimi-NITE 2.0 system builds on Xylem's original system and offers users increased efficiency and additional features, including feed forward and/or feedback control of the carbon source, several types of level control, media selection, backwash optimization and run time optimization.
Various controls allow for optimum performance. The carbon source can be fed on a mass basis using the filter influent flow rate and nitrate concentration, or using feed-forward control. The feedback portion of the system’s control algorithm allows users to set and hold the optimum desired effluent nitrate concentration. And by using our constant water level control, you can achieve the least amount of dissolved oxygen gain in the feed-water, which lowers the overall amount of carbon source needed to achieve process goals.