NC Reclamation Facility Boosts Denitrification & Compliance While Reducing MicroC® 2000 Cost

The North Carolina water reclamation facility is designed for a maximum flow of 3.6 MGD, consisting of one anoxic ditch and two oxidation ditches configured as an MLE — a Modified Ludzack-Ettinger process using nitrate produced in the aeration zone as a source of oxygen for treatment bacteria needed in the event of the breakdown of raw wastewater in the anoxic pan.

Historically, the plant treated approximately 3.5MGD of municipal wastewater and discharged the treated effluent to a surface waterway, with a TN(total nitrogen) limit of 40,457 lbs./year, corresponding to 4.0 mg N/L at full design flow. The plant has been using EOSi’s MicroC® 2000 as a supplemental carbon source for several years, with RAS (return activated sludge) and nitrate recirculation flows averaging 3.5 MGD and 35-42MGD, respectively.